ORCID Profile
0000-0002-4610-0758
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Manufacturing Engineering | Manufacturing Processes and Technologies (excl. Textiles) | Microtechnology
Publisher: Elsevier BV
Date: 02-2015
Publisher: Elsevier BV
Date: 2012
Publisher: Elsevier BV
Date: 06-2011
Publisher: American Chemical Society (ACS)
Date: 04-12-2019
Publisher: Elsevier BV
Date: 04-2020
Publisher: American Chemical Society (ACS)
Date: 20-11-2014
DOI: 10.1021/LA503547N
Abstract: Molecular simulation techniques have revealed that the incorporation of fullerenes within porous aromatic frameworks (PAFs) remarkably enhances methanol uptake while inhibiting water uptake. The highest selectivity of methanol over water is found to be 1540 at low pressure (1 kPa) and decreases gradually with increasing pressure. The adsorption of water is very small compared to methanol, a useful material property for membrane and adsorbent-based separations. Grand canonical Monte Carlo (GCMC) simulations are utilized to calculate the pure component and mixture adsorption isotherms. The water and methanol mixture simulations show that water uptake is further inhibited above the pure component results because of the dominant methanol adsorption. Molecular dynamics (MD) simulations confirm that water diffusivity is also inhibited by strong methanol adsorption in the mixture. Overall, this study reveals profound hydrophobicity in C60@PAF materials and recommends C60@PAFs as suitable applicants for adsorbent and membrane-based separations of methanol/water mixtures and other alcohol/water separation applications.
Publisher: American Chemical Society (ACS)
Date: 26-06-2018
Publisher: Elsevier BV
Date: 07-2023
Publisher: Elsevier BV
Date: 11-2021
Publisher: Wiley
Date: 02-2017
Publisher: Springer Science and Business Media LLC
Date: 10-05-2018
Publisher: Elsevier BV
Date: 11-2020
Publisher: American Chemical Society (ACS)
Date: 29-10-2021
Publisher: Elsevier
Date: 2018
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C7RA12447C
Abstract: Ultrafiltration membranes with improved filtration performance and antifouling properties have been synthesized through blending polyethersulfone with carboxylic acid functionalized polysulfone.
Publisher: Elsevier BV
Date: 04-2013
Publisher: Elsevier BV
Date: 09-2014
Publisher: Springer Science and Business Media LLC
Date: 12-07-2020
Publisher: Elsevier BV
Date: 02-2019
Publisher: Elsevier BV
Date: 02-2021
Publisher: Elsevier BV
Date: 02-2020
Publisher: MDPI AG
Date: 19-08-2020
DOI: 10.3390/MEMBRANES10090193
Abstract: Pervaporation (PV) has been an intriguing membrane technology for separating liquid mixtures since its commercialization in the 1980s. The design of highly permselective materials used in this respect has made significant improvements in separation properties, such as selectivity, permeability, and long-term stability. Mixed-matrix membranes (MMMs), featuring inorganic fillers dispersed in a polymer matrix to form an organic–inorganic hybrid, have opened up a new avenue to facilely obtain high-performance PV membranes. The combination of inorganic fillers in a polymer matrix endows high flexibility in designing the required separation properties of the membranes, in which various fillers provide specific functions correlated to the separation process. This review discusses recent advances in the use of nanofillers in PV MMMs categorized by dimensions including zero-, one-, two- and three-dimensional nanomaterials. Furthermore, the impact of the nanofillers on the polymer matrix is described to provide in-depth understanding of the structure–performance relationship. Finally, the applications of nanofillers in MMMs for PV separation are summarized.
Publisher: Elsevier BV
Date: 11-2022
Publisher: Wiley
Date: 29-04-2022
Abstract: Structured catalytic reactors are gaining considerable attention for integrated chemical synthesis because they offer enhanced mass transfer and easy catalyst recovery. In this paper, a new, cost‐effective design strategy that combines 3D printing and single‐atom catalysis is presented, enabling the construction of an integrated mixer‐based reactor insert, coated with a thin single‐atom catalytic layer. The material has been characterized from the nano to the macro scale to unlock structure‐property relationships. The performance of the catalyst structure was evaluated via hydrogenation of two model compounds used in the flavorings and fragrances industry. The structured catalytic reactor was active, selective, and reusable several times without apparent drop in performance. This immobilized catalyst system removes the need for catalyst separation post‐reaction, and enables modern synthesis options catalyzed over atomically‐precise nanomaterials.
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6EW00156D
Abstract: We examined the synergistic effect of combined fouling in MD process with three organic foulants – alginate, bovine serum albumin, and humic acid – in the presence of colloidal silica particles.
Publisher: American Chemical Society (ACS)
Date: 28-01-2021
Publisher: Springer Science and Business Media LLC
Date: 15-04-2023
DOI: 10.1038/S41467-023-37932-9
Abstract: Engineering different two-dimensional materials into heterostructured membranes with unique physiochemical properties and molecular sieving channels offers an effective way to design membranes for fast and selective gas molecule transport. Here we develop a simple and versatile pyro-layering approach to fabricate heterostructured membranes from boron nitride nanosheets as the main scaffold and graphene nanosheets derived from a chitosan precursor as the filler. The rearrangement of the graphene nanosheets adjoining the boron nitride nanosheets during the pyro-layering treatment forms precise in-plane slit-like nanochannels and a plane-to-plane spacing of ~3.0 Å, thereby endowing specific gas transport pathways for selective hydrogen transport. The heterostructured membrane shows a high H 2 permeability of 849 Barrer, with a H 2 /CO 2 selectivity of 290. This facile and scalable technique holds great promise for the fabrication of heterostructures as next-generation membranes for enhancing the efficiency of gas separation and purification processes.
Publisher: Wiley
Date: 19-06-2021
DOI: 10.1002/JCTB.6816
Abstract: With the increasing environmental pollution issues arising from NO x , the low‐temperature selective catalytic reduction (LT‐SCR) of NO x by NH 3 is becoming more important. Mn/Fe mixed oxides type catalysts have been proven to be particularly effective at low temperature reactions however, the synthesis method can be a key factor determining the SCR activities. A comprehensive study of LT‐SCR was carried out on a series of Mn/Fe mixed oxides catalysts prepared using erse synthesis methods, namely, sonication assisted continuous coprecipitation (SACP), equilibrium adsorption (EA), precipitation method using either NaOH (P‐OH) or Na 2 CO 3 (P‐CO) as precipitant, and one pot hydrothermal synthesis (CA). The morphology, composition, crystal property, oxidation status, and surface property were systematically characterised. LT‐SCR of the NO x performance of prepared Mn/Fe catalysts was conducted in temperatures from 75 to 225 °C. It was demonstrated that, at reaction temperatures under 125 °C, LT‐SCR performance showed the trend of P‐OH SACP EA ~ CA P‐CO meanwhile, the trend was CA SACP P‐OH ~ EA P‐CO at temperatures over 125 °C. However, N 2 selectivity showed the trend SACP CA P‐OH overall. The characterisation results suggested that NO x conversion performance is controlled by several parameters, especially uniformity of materials, high surface area, Mn crystallinity, surface oxygen defects, Fe (III) on the surface these are important parameters to achieve high denitrification performance as shown by P‐OH and SACP under low temperature. At higher temperatures, the stability of materials and high Brønsted acid sites on the surface are important, leading to better performance by CA and SACP.
Publisher: Springer Science and Business Media LLC
Date: 06-01-2022
DOI: 10.1057/S41599-021-01018-Y
Abstract: In Vietnam, a country where religious expression is widespread, many gods and goddesses are commonly worshipped. Among those, Bà Tổ Cô (Family Goddess) is widely worshipped in the North of Vietnam due to her exceptional background as unmarried, young, and having spiritual roots, unlike other national and heroic figures. This article examines the sanctity of the Family Goddess by decoding the terms, worshippers, beliefs and practices, sacred encounters and supports. The research is a final result of decade-long field trips, archival study, and in-depth interviews with various stakeholders. The research findings show that the veneration of the Family Goddess in Northern Vietnam is a continuity of a long-standing tradition of worshipping female deities in Asia and thus emphasising the need to maintain this unique intangible heritage as a crucial part of Vietnamese cultural ersity.
Publisher: American Chemical Society (ACS)
Date: 19-01-2021
Publisher: Wiley
Date: 18-10-2012
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9EW00701F
Abstract: Conducted using multifunctional equipment, this comparative study showed 95% PFAS removal achieved by ozonated air fractionation.
Publisher: Springer Science and Business Media LLC
Date: 28-09-2010
Publisher: Elsevier BV
Date: 04-2014
Publisher: MDPI AG
Date: 28-01-2021
DOI: 10.3390/PR9020243
Abstract: The textile industry is an important contributor to the growth of the global economy. However, a huge quantity of wastewater is generated as a by-product during textile manufacturing, which hinders the ongoing development of textile industry in terms of environmental sustainability. Membrane distillation (MD), which is driven by thermal-induced vapor pressure difference, is being considered as an emerging economically viable technology to treat the textile wastewater for water reuse. So far, massive efforts have been put into new membrane material developments and modifications of the membrane surface. However, membrane wetting, direct feed solution transport through membrane pores leading to the failure of separation, remains as one of the main challenges for the success and potential commercialization of this separation process as textile wastewater contains membrane wetting inducing surfactants. Herein, this review presents current progress on the MD process for textile wastewater treatment with particular focuses on the fundamentals of membrane wetting, types of membranes applied as well as the fabrication or modification of membranes for anti-wetting properties. This article aims at providing insights in membrane design to enhance the MD separation performance towards commercial application of textile wastewater treatment.
Publisher: Elsevier BV
Date: 2012
Publisher: Elsevier BV
Date: 07-2022
Publisher: Wiley
Date: 12-2011
DOI: 10.1002/APP.33397
Publisher: MDPI AG
Date: 21-04-2021
DOI: 10.3390/MEMBRANES11050305
Abstract: The application of membrane technologies for wastewater treatment to recover water and nutrients from different types of wastewater can be an effective strategy to mitigate the water shortage and provide resource recovery for sustainable development of industrialisation and urbanisation. Forward osmosis (FO), driven by the osmotic pressure difference between solutions ided by a semi-permeable membrane, has been recognised as a potential energy-efficient filtration process with a low tendency for fouling and a strong ability to filtrate highly polluted wastewater. The application of FO for wastewater treatment has received significant attention in research and attracted technological effort in recent years. In this review, we review the state-of-the-art application of FO technology for sewage concentration and wastewater treatment both as an independent treatment process and in combination with other treatment processes. We also provide an outlook of the future prospects and recommendations for the improvement of membrane performance, fouling control and system optimisation from the perspectives of membrane materials, operating condition optimisation, draw solution selection, and multiple technologies combination.
Publisher: MDPI AG
Date: 07-04-2020
DOI: 10.3390/MEMBRANES10040065
Abstract: The current situation with the problems associated with the removal of oil from wastewaters by membranes is being explored. Many types of membranes have been investigated—organic polymers, inorganic or ceramic species and hybrids of the two. Polymeric membranes can be designed to facilitate the passage of oil, but the more successful approach is with hydrophilic types that encourage the passage of water. Ceramic membranes have an advantage here as they are less often irreversibly fouled and give a higher recovery of oil, with a lower flux decline. Furthermore, they can be cleaned up by a simple heating procedure. More attention should be given to understanding the mechanism of fouling so that operating conditions can be optimised to further reduce fouling and further decrease the flux decline, as well as assisting in the design of antifouling membranes. Another obstacle to ceramic membrane use is the high cost of manufacture. Cheaper starting materials such as clays have been surveyed.
Publisher: Elsevier BV
Date: 07-2020
Publisher: American Chemical Society (ACS)
Date: 02-10-2009
DOI: 10.1021/IE901025D
Publisher: American Chemical Society (ACS)
Date: 26-10-2017
Abstract: Membrane separation is a promising technology for extracting temperature-sensitive organic molecules from solvents. However, a lack of membrane materials that are permeable toward organic solvents yet highly selective curtails large-scale membrane applications. To overcome the trade-off between flux and selectivity, additional molecular transportation pathways are constructed in ultrathin polyamide membranes using highly hydrostable metal organic frameworks with erse functional surface architectures. Additional passageways enhance water permeance by 84% (15.4 L m
Publisher: MDPI AG
Date: 12-2021
DOI: 10.3390/MEMBRANES11120955
Abstract: Methylcyclohexane (MCH), one of the liquid organic hydrogen carriers (LOHCs), offers a convenient way to store, transport, and supply hydrogen. Some features of MCH such as its liquid state at ambient temperature and pressure, large hydrogen storage capacity, its well-known catalytic endothermic dehydrogenation reaction and ease at which its dehydrogenated counterpart (toluene) can be hydrogenated back to MCH and make it one of the serious contenders for the development of hydrogen storage and transportation system of the future. In addition to advances on catalysts for MCH dehydrogenation and inorganic membrane for selective and efficient separation of hydrogen, there are increasing research interests on catalytic membrane reactors (CMR) that combine a catalyst and hydrogen separation membrane together in a compact system for improved efficiency because of the shift of the equilibrium dehydrogenation reaction forwarded by the continuous removal of hydrogen from the reaction mixture. Development of efficient CMRs can serve as an important step toward commercially viable hydrogen production systems. The recently demonstrated commercial MCH-TOL based hydrogen storage plant, international transportation network and compact hydrogen producing plants by Chiyoda and some other companies serves as initial successful steps toward the development of full-fledged operation of manufacturing, transportation and storage of zero carbon emission hydrogen in the future. There have been initiatives by industries in the development of compact on-board dehydrogenation plants to fuel hydrogen-powered locomotives. This review mainly focuses on recent advances in different technical aspects of catalytic dehydrogenation of MCH and some significant achievements in the commercial development of MCH-TOL based hydrogen storage, transportation and supply systems, along with the challenges and future prospects.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8TA01200H
Abstract: Novel TFN-FO membranes with improved water flux have been synthesized by adding C 60 @PAF 900 into the organic phase of interfacial polymerization.
Publisher: Elsevier BV
Date: 06-2019
Publisher: American Chemical Society (ACS)
Date: 20-06-2023
Publisher: Wiley
Date: 10-04-2017
Abstract: To minimize energy consumption and carbon footprints, pervaporation membranes are fast becoming the preferred technology for alcohol recovery. However, this approach is confined to small-scale operations, as the flux of standard rubbery polymer membranes remain insufficient to process large solvent volumes, whereas membrane separations that use glassy polymer membranes are prone to physical aging. This study concerns how the alcohol affinity and intrinsic porosity of networked, organic, microporous polymers can simultaneously reduce physical aging and drastically enhance both flux and selectivity of a super glassy polymer, poly-[1-(trimethylsilyl)propyne] (PTMSP). Slight loss in alcohol transportation channels in PTMSP is compensated by the alcohol affinity of the microporous polymers. Even after continuous exposure to aqueous solutions of alcohols, PTMSP pervaporation membranes loaded with the microporous polymers outperform the state-of-the-art and commercial pervaporation membranes.
Publisher: Elsevier BV
Date: 05-2023
Publisher: Elsevier BV
Date: 05-2013
Publisher: MDPI AG
Date: 03-09-2018
Abstract: Desalination by pervaporation is a membrane process that is yet to be realized for commercial application. To investigate the feasibility and viability of scaling up, a process engineering model was developed to evaluate the energy requirement based on the experimental study of a hybrid polyvinyl alcohol/maleic acid/tetraethyl orthosilicate (PVA/MA/TEOS) Pervaporation Membrane. The energy consumption includes the external heating and cooling required for the feed and permeate streams, as well as the electrical power associated with pumps for re-circulating feed and maintaining vacuum. The thermal energy requirement is significant (e.g., up to 2609 MJ/m3 of thermal energy) and is required to maintain the feed stream at 65 °C in recirculation mode. The electrical energy requirement is very small ( .2 kWh/m3 of required at 65 °C feed temperature at steady state) with the vacuum pump contributing to the majority of the electrical energy. The energy required for the pervaporation process was also compared to other desalination processes such as Reverse Osmosis (RO), Multi-stage Flash (MSF), and Multiple Effect Distillation (MED). The electrical energy requirement for pervaporation is the lowest among these desalination technologies. However, the thermal energy needed for pervaporation is significant. Pervaporation may be attractive when the process is integrated with waste heat and heat recovery option and used in niche applications such as RO brine concentration or salt recovery.
Publisher: American Chemical Society (ACS)
Date: 26-06-2020
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C8EW00624E
Abstract: Mechanism of the organic selectivity and mass transfer resistance of the dual-layer membrane in vacuum membrane distillation.
Publisher: MDPI AG
Date: 21-06-2022
DOI: 10.3390/MEMBRANES12070639
Abstract: Membranes with excellent separation performance and stability are needed for organic solvent nanofiltration in industrial separation and purification processes. Here we reported a newly PPSU-MoS2/PA-MIL-101(Cr) composite membrane with high permeance, good selectivity and stability. The MIL-101(Cr) was introduced in the polyamide (PA) layer via the PIP/TMC interfacial polymerization process on a microporous PPSU-MoS2 substrate. At a small doping amount of 0.005 wt% MIL-101(Cr), the PPSU-MoS2/PA-MIL-101(Cr) composite membrane exhibited a high methanol permeance of 12.03 L m−2 h−1 bar−1, twice higher than that of the pristine membrane without sacrificing selectivity. Furthermore, embedding MIL-101(Cr) notably enhanced the stability of the composite membrane, with permeance only decreasing by 8% after a long time operation of 80 h (pristine membrane decreased by 25%). This work demonstrated a composite membrane modified by MIL-101(Cr) with superior separation performance, which provides potential application of MOF materials for high-performance membranes in organic solvent nanofiltration and a theoretical foundation for future research in studying MOF’s influence on membrane properties.
Publisher: MDPI AG
Date: 05-02-2023
DOI: 10.3390/SU15042879
Abstract: Due to their stable chemical properties and complex structures, dyes are difficult to be removed from water. Herein, a ZIF-67/SA@PVDF (ZSA3@PVDF) mixed matrix membrane has been fabricated by incorporating silicon aerogel (SA) and zeolitic imidazolate framework material 67 (ZIF-67) nanoparticles in a polyvinylidene fluoride (PVDF) membrane for the removal and degradation of dyes from water. The influence of SA and ZIF-67 on the morphology and structure of the membrane was confirmed using scanning electron microscope (SEM) and atomic force microscope (AFM). In ZSA3@PVDF membrane, both SA and ZIF-67 are highly porous nanomaterials that possess good adsorption capacity, as confirmed by the Brunauer–Emmett–Teller (BET) result. In addition, the cobalt (Co) element of ZIF-67 can catalyze peroxymonosulfate (PMS) to generate strong oxidizing sulfate radicals (SO42−), contributing to improving regeneration capacity of the ZIF-67/SA@PVDF membrane. The water flux of ZSA3@PVDF membrane is 427.6 L m−2 h−1 bar−1, and the Methylene blue (MB) removal rate is higher than 99% when filtrating 100 mL MB solution (5 mg/L). The regeneration test result shows that the removal rate of the ZSA3@PVDF membrane is still above 98% after five cycles of adsorption of MB. The self-cleaning experiment shows that the adsorption of SA in the ZSA3@PVDF membrane promotes the catalytic performance of the membrane, showing a better self-cleaning ability. The ZSA3@PVDF membrane provides a new strategy for the removal of dyes in the advanced purification of dye wastewater.
Publisher: Trans Tech Publications, Ltd.
Date: 07-10-2011
DOI: 10.4028/WWW.SCIENTIFIC.NET/AMR.356-360.1708
Abstract: Two kinds of SnS 2 materials were prepared through the hydrothermal route, respectively using thioacetamide (TAA) and thiourea as the sulfur source. The as-prepared SnS 2 s les were characterized with X-ray diffraction (XRD), scanning electron microscopy (SEM) and N 2 -sorption. The results showed that the SnS 2 s le prepared with TAA had a lengthening shape, a smaller size and surface area, but a better adsorption of rhodamine B (RhB). X-ray photoelectron spectroscopy (XPS) analysis was used to confirm that there was an interaction between RhB molecule and SnS 2 contributing to the strong adsorption of RhB.
Publisher: Elsevier BV
Date: 07-2016
Publisher: Elsevier BV
Date: 12-2021
Publisher: Elsevier BV
Date: 06-2011
Publisher: American Chemical Society (ACS)
Date: 07-2015
Abstract: Nitrogen-functionalized carbon nanofibers (N-CNFs) were prepared by carbonizing polypyrrole (PPy)-coated cellulose NFs, which were obtained by electrospinning, deacetylation of electrospun cellulose acetate NFs, and PPy polymerization. Supercapacitor electrodes prepared from N-CNFs and a mixture of N-CNFs and Ni(OH)2 showed specific capacitances of ∼236 and ∼1045 F g(-1), respectively. An asymmetric supercapacitor was further fabricated using N-CNFs/Ni(OH)2 and N-CNFs as positive and negative electrodes. The supercapacitor device had a working voltage of 1.6 V in aqueous KOH solution (6.0 M) with an energy density as high as ∼51 (W h) kg(-1) and a maximum power density of ∼117 kW kg(-1). The device had excellent cycle lifetime, which retained ∼84% specific capacitance after 5000 cycles of cyclic voltammetry scans. N-CNFs derived from electrospun cellulose may be useful as an electrode material for development of high-performance supercapacitors and other energy storage devices.
Publisher: Elsevier BV
Date: 12-2012
Publisher: Royal Society of Chemistry (RSC)
Date: 2020
DOI: 10.1039/D0RA02947E
Abstract: The surface properties and structures of the polyamide (PA) active layer were suitably tailored by introducing different amounts of NH 2 -SWCNTs into the PA layer.
Publisher: MDPI AG
Date: 08-02-2021
DOI: 10.3390/MEMBRANES11020122
Abstract: In this paper, the transport phenomena in four common membrane distillation (MD) configurations and three popular modelling approaches are introduced. The mechanism of heat transfer on the feed side of all configurations are the same but are distinctive from each other from the membrane interface to the bulk permeate in each configuration. Based on the features of MD configurations, the mechanisms of mass and heat transfers for four configurations are reviewed together from the bulk feed to the membrane interface on the permeate but reviewed separately from the interface to the bulk permeate. Since the temperature polarisation coefficient cannot be used to quantify the driving force polarisation in Sweeping Gas MD and Vacuum MD, the rate of driving force polarisation is proposed in this paper. The three popular modelling approaches introduced are modelling by conventional methods, computational fluid dynamics (CFD) and response surface methodology (RSM), which are based on classic transport mechanism, computer science and mathematical statistics, respectively. The default assumptions, area for applications, advantages and disadvantages of those modelling approaches are summarised. Assessment and comparison were also conducted based on the review. Since there are only a couple of full-scale plants operating worldwide, the modelling of operational cost of MD was only briefly reviewed. Gaps and future studies were also proposed based on the current research trends, such as the emergence of new membranes, which possess the characteristics of selectivity, anti-wetting, multilayer and incorporation of inorganic particles.
Publisher: Elsevier BV
Date: 02-2012
DOI: 10.1016/J.WATRES.2011.10.052
Abstract: In vapour permeation the feed is a vapour, not a liquid as in pervaporation. The process employs a polymeric membrane as a semi-permeable barrier between the feed side under high pressure and the permeate side under low pressure. Separation is achieved by the different degrees to which components are dissolved in and diffuse through the membrane, the system working according to a solution-diffusion mechanism. The materials used in the membrane depend upon the types of compounds being separated, so water transport is favoured by hydrophilic material, whether organic or inorganic. The process is used for the dehydration of natural gas and various organic solvents, notably alcohol as biofuel, as well as the removal of water from air and its recovery from waste steam. Waste steam can be found in almost every plant/factory where steam is used. It is frequently contaminated and cannot be reused. Discharging the spent steam to the atmosphere is a serious energy loss and environmental issue. Recycling the steam can significantly improve the overall energy efficiency of an industry, which is responsible for massive CO(2) emissions. Steam separation at high fluxes and temperatures has been accomplished with a composite poly(vinyl alcohol) membrane containing silica nanoparticles, and also, less efficiently, with an inorganic zeolite membrane.
Publisher: Elsevier BV
Date: 05-2020
Publisher: Elsevier BV
Date: 11-2020
Publisher: American Chemical Society (ACS)
Date: 27-10-2020
Publisher: American Chemical Society (ACS)
Date: 15-02-2023
Publisher: Wiley
Date: 03-02-2017
DOI: 10.1002/APP.44839
Publisher: Elsevier
Date: 2015
Publisher: Elsevier BV
Date: 12-2012
Publisher: Elsevier BV
Date: 11-2011
Publisher: Elsevier BV
Date: 07-2013
Publisher: Springer Science and Business Media LLC
Date: 11-2015
Publisher: Elsevier BV
Date: 04-2009
DOI: 10.1016/J.WATRES.2008.12.052
Abstract: Wastewater containing low levels of ammonia (100 mg/L) has been simulated in experiments with sweep gas membrane distillation at pH 11.5. The effects of feed temperature, gas flow rate and feed flow rate on ammonia removal, permeate flux and selectivity were investigated. The feed temperature is a crucial operating factor, with increasing feed temperature increasing the permeate flux significantly, but reducing the selectivity. The best-performing conditions of highest temperature and fastest gas flow rate resulted in 97% removal of the ammonia, to give a treated water containing only 3.3 mg/L of ammonia.
Publisher: Elsevier BV
Date: 03-2024
Publisher: Elsevier BV
Date: 07-2003
Publisher: American Chemical Society (ACS)
Date: 11-04-2017
Abstract: Membrane materials with high permeability to solvents while rejecting dissolved contaminants are crucial to lowering the energy costs associated with liquid separations. However, the current lack of stable high-permeability materials require innovative engineering solutions to yield high-performance, thin membranes using stable polymers with low permeabilities. Poly[1-(trimethylsilyl)-1-propyne] (PTMSP) is one of the most permeable polymers but is extremely susceptible to physical aging. Despite recent developments in anti-aging polymer membranes, this research breakthrough has yet to be demonstrated on thin PTMSP films supported on porous polymer substrates, a crucial step toward commercializing anti-aging membranes for industrial applications. Here we report the development of scalable, thin film nanocomposite membranes supported on polymer substrates that are resistant to physical aging while having high permeabilities to alcohols. The selective layer is made up of PTMSP and nanoporous polymeric additives. The nanoporous additives provide additional passageways to solvents, enhancing the high permeability of the PTMSP materials further. Through intercalation of polyacetylene chains into the sub-nm pores of organic additives, physical aging in the consequent was significantly hindered in continuous long-term operation. Remarkably we also demonstrate that the additives enhance both membrane permeability and rejection of dissolved contaminants across the membranes, as ethanol permeability at 5.5 × 10
Publisher: Elsevier BV
Date: 08-2021
Publisher: Wiley
Date: 04-12-2020
DOI: 10.1002/JCTB.6612
Publisher: Elsevier BV
Date: 07-2014
Publisher: Elsevier BV
Date: 03-2018
DOI: 10.1016/J.WATRES.2017.12.002
Abstract: Colloidal silica involved fouling behaviors in direct contact membrane distillation (DCMD), vacuum membrane distillation (VMD) and sweeping gas membrane distillation (SGMD) were studied. Three foulants were used in the experiments, including colloidal silica as representative of particulate foulants, calcium bicarbonate as dissolved inorganic foulant, and NOM (humic acid + alginate + BSA) as the dissolved organic foulant. The three types of fouants were combined to produce four different feed waters: silica alone silica + calcium bicarbonate silica + NOM and silica + calcium bicarbonate + NOM. With 25% feed recovery, it was found that VMD showed the worst performance for most of the foulant combinations due to turbulence dead zones caused by the membrane deformation that increased foulant deposition. For the silica + calcium bicarbonate + NOM feed DCMD had the greatest fouling rate, although DCMD also had the highest flux of all configurations. SGMD showed the best fouling resistance of all configurations, although it was inclined to calcium carbonate fouling because carbon dioxide was removed in the permeate leading to calcium carbonate precipitation and could be alleviated by using air as sweeping gas. For feeds containing high-concentration calcium bicarbonate or carbonate foulants, VMD should be avoided to lower the formation of carbonate precipitants on the membrane surface if scale inhibitors are not used.
Publisher: Elsevier BV
Date: 2022
Publisher: Elsevier BV
Date: 12-2022
Publisher: American Chemical Society (ACS)
Date: 17-12-2021
Publisher: Elsevier BV
Date: 09-2021
Publisher: Royal Society of Chemistry (RSC)
Date: 2014
DOI: 10.1039/C4SM00589A
Abstract: A sufficient and well dispersed silica network stabilizes the nanostructure in cross-linked poly(ethylene glycol) diacrylate templated from hexagonal lyotropic liquid crystals (LLC).
Publisher: Royal Society of Chemistry (RSC)
Date: 2012
DOI: 10.1039/C1SM06526B
Publisher: Elsevier BV
Date: 07-2020
Publisher: Elsevier BV
Date: 09-2009
Publisher: Elsevier BV
Date: 03-2011
Publisher: Elsevier BV
Date: 12-2021
Publisher: Elsevier BV
Date: 2023
Publisher: Springer Science and Business Media LLC
Date: 10-07-2023
DOI: 10.1038/S41467-023-39533-Y
Abstract: Covalent modification is commonly used to tune the channel size and functionality of 2D membranes. However, common synthesis strategies used to produce such modifications are known to disrupt the structure of the membranes. Herein, we report less intrusive yet equally effective non-covalent modifications on Ti 3 C 2 T x MXene membranes by a solvent treatment, where the channels are robustly decorated by protic solvents via hydrogen bond network. The densely functionalized (-O, -F, -OH) Ti 3 C 2 T x channel allows multiple hydrogen bond establishment and its sub-1-nm size induces a nanoconfinement effect to greatly strengthen these interactions by maintaining solvent-MXene distance and solvent orientation. In sub-1-nm ion sieving and separation, as-decorated membranes exhibit stable ion rejection, and proton-cation (H + /M n+ ) selectivity that is up to 50 times and 30 times, respectively, higher than that of pristine membranes. It demonstrates the feasibility of non-covalent methods as a broad modification alternative for nanochannels integrated in energy-, resource- and environment-related applications.
Publisher: Elsevier BV
Date: 02-2021
Publisher: Elsevier BV
Date: 2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2019
DOI: 10.1039/C9TA04031E
Abstract: Hydrophilic pervaporation (PV) membranes with ultrahigh throughput and outstanding separation ability are highly beneficial for efficient separation of aqueous mixtures.
Publisher: Public Library of Science (PLoS)
Date: 09-06-2016
Publisher: Elsevier BV
Date: 06-2016
Publisher: Elsevier BV
Date: 11-2018
Publisher: Elsevier BV
Date: 12-2001
Publisher: American Chemical Society (ACS)
Date: 06-07-2019
Publisher: Elsevier BV
Date: 06-2022
DOI: 10.1016/J.SCITOTENV.2022.154310
Abstract: This study investigated a gas fractionation enhanced soil washing method for poly-and perfluoroalkyl substances (PFAS) removal from contaminated soil. With the assistance of gas fractionation, PFAS removal was increased by a factor of 9, compared to the conventional soil washing method. Pre-extraction (pre-treatment) of the soil with water before gas fractionation enhanced PFAS removal from soil. The optimum extraction time varied based on the soil particle size, since it will change the swelling time of the soil. The influence of various operational conditions such as water to soil mass ratio (W:S ratio), gas type in fractionation, gas flowrate, fractionation time and soil pre-treatment condition have been studied to identify the critical influencing factors. Among various W:S ratios (2, 4, 5, 6, 8, and 10) studied, higher W:S ratio resulted in better PFAS removals, but PFAS removal began to plateau as the W:S ratio increased. PFAS removal could be improved by repeated treatment with low water consumption. Air, oxygen, and ozone generated by air and oxygen were used, in which ozone generated by oxygen achieved the highest PFAS removals of 55.9%. Among different fractionation times (10 min, 20 min and 30 min), a fractionation time of 20 min achieved better total PFAS removal for studied soil, because PFOS was the dominant species in the total PFAS. However, the removal of some PFAS species, such as PFHxS, would be increased with extended fractionation time. With constant fractionation time (10 min), PFAS removal performance improved with the increasing gas flowrate.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8RA03166E
Abstract: Incorporation of dopamine enhanced selectivity and antifouling properties of novel TFC polyamide FO membranes.
Publisher: American Chemical Society (ACS)
Date: 16-09-2021
Publisher: Elsevier BV
Date: 08-2020
No related organisations have been discovered for Zongli Xie.
Start Date: 06-2020
End Date: 09-2023
Amount: $550,000.00
Funder: Australian Research Council
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