ORCID Profile
0000-0003-1700-297X
Current Organisation
University of Melbourne
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In Research Link Australia (RLA), "Research Topics" refer to ANZSRC FOR and SEO codes. These topics are either sourced from ANZSRC FOR and SEO codes listed in researchers' related grants or generated by a large language model (LLM) based on their publications.
Chemical Engineering | Physical Chemistry of Materials | Carbon Capture Engineering (excl. Sequestration) | Process Control and Simulation | Membrane and Separation Technologies | Separation Science | Chemical Thermodynamics and Energetics | Heat and Mass Transfer Operations | Petroleum and Reservoir Engineering
Expanding Knowledge in Engineering | Expanding Knowledge in the Chemical Sciences | Energy Storage, Distribution and Supply not elsewhere classified | Oil and Gas Refining | Oil and Gas Extraction | Management of Greenhouse Gas Emissions from Mineral Resource Activities | Management of Greenhouse Gas Emissions from Energy Activities (excl. Electricity Generation) |
Publisher: American Chemical Society (ACS)
Date: 09-02-2023
Publisher: American Chemical Society (ACS)
Date: 15-05-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2017
DOI: 10.1039/C6SC03533G
Abstract: A type B radical-SAM methylase homologue catalyses thiazoline C-methylation as the final step of watasemycin biosynthesis in Streptomyces venezuelae ATCC10712.
Publisher: Royal Society of Chemistry (RSC)
Date: 2018
DOI: 10.1039/C8CC00634B
Abstract: Molecular trapdoor chabazites with lowered Si/Al ratios show elevated operating temperatures for carbon capture and significantly improved separation power.
Publisher: Wiley
Date: 03-12-2022
Abstract: The need for effective and adaptive technologies for carbon dioxide (CO 2 ) mitigation targeting global net‐zero carbon emissions is critically growing. Hence, innovative technologies for CO 2 reduction have attracted worldwide interest from scientific research communities. The use of liquid metals for the conversion of CO 2 into carbon or solid carbonaceous products has gained increasing attention in recent years due to their high activity and resistance to coking. Here, a facile approach for the reduction of CO 2 to solid carbon using liquid Mg at and near room temperature, and atmospheric pressure is presented. In this process, magnesium (Mg) plays a major role in driving the dissociation of CO 2 to its elemental constituents, carbon and oxygen. During the reaction process, Mg ions dissolve in gallium (Ga) liquid metal alloy, diffuse to the gas–liquid interface, and reduce CO 2 to carbon while undergoing an oxidation reaction. The electrochemical method ensures a sustainable cyclic process by reducing Mg and Ga ions back to their metallic counterpart. The use of liquid metal alloys for CO 2 reduction reactions can enable to achieve CO 2 capture and storage at room temperature, setting a new foundation for the future exploration of efficient CO 2 mitigation issues.
Publisher: American Chemical Society (ACS)
Date: 11-03-2022
Abstract: Active regulation of pore accessibility in microporous materials by external stimuli has aroused great attention in recent years. Here, we show the first experimental proof that guest adsorption in a dielectric microporous material can be regulated by a moderate external E-field below the gas breakdown voltage. CO
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3TA00408B
Abstract: Gallium as a solvent liquid metal catalyst is used in an energy efficient, high yield and controlled reaction between lithium and CO 2 . A liquid metal electrode and the naturally formed surface products are used as a supercapacitor.
Publisher: Springer Science and Business Media LLC
Date: 25-09-2019
DOI: 10.1038/S41467-019-12285-4
Abstract: The shape-selective catalysis enabled by zeolite micropore’s molecular-sized sieving is an efficient way to reduce the cost of chemical separation in the chemical industry. Although well studied since its discovery, HZSM-5′s shape-selective capability has never been fully exploited due to the co-existence of its different-sized straight channels and sinusoidal channels, which makes the shape-selective p -xylene production from toluene alkylation with the least m -xylene and o -xylene continue to be one of the few industrial challenges in the chemical industry. Rather than modifications which promote zeolite shape-selectivity at the cost of stability and reactivity loss, here inverse Al zoned HZSM-5 with sinusoidal channels predominantly opened to their external surfaces is constructed to maximize the shape-selectivity of HZSM-5 sinusoidal channels and reach 99 % p -xylene selectivity, while keeping a very high activity and good stability ( 220 h) in toluene methylation reactions. The strategy shows good prospects for shape-selective control of molecules with tiny differences in size.
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D3CP01834B
Abstract: Na + cations change the 8MR pore aperture and limit the accessibility of different gas molecules to the internal pores of ZSM-25.
Publisher: Wiley
Date: 06-2023
Abstract: The traditional CO 2 hydrogenation reaction in gas phase always requires harsh reaction conditions to activate CO 2 , resulting in huge energy consumption. However, with the assistance of 1‐butanol solvent, catalytic CO 2 hydrogenation can be proceeded at a mild condition of 170 °C and 30 bars. To further improve the catalytic performance of the widely studied Cu‐ZnO‐ZrO 2 catalyst (CZZ), the catalysts were modified by incorporating hydrotalcite (HTC) as a support material. The addition of HTC significantly improved the copper dispersion and surface area of the catalyst. The performance of CZZ‐HTC catalysts was investigated at varying weight percentages of HTC, and all showed higher space‐time yield of methanol (STY MeOH ) compared to the commercial catalyst. Notably, CZZ‐6HTC exhibited the highest methanol selectivity, further highlighting the beneficial role of HTC as a support material.
Publisher: Springer Science and Business Media LLC
Date: 09-06-2017
DOI: 10.1038/NCOMMS15777
Abstract: While it has long been known that some highly adsorbing microporous materials suddenly become inaccessible to guest molecules below certain temperatures, previous attempts to explain this phenomenon have failed. Here we show that this anomalous sorption behaviour is a temperature-regulated guest admission process, where the pore-keeping group’s thermal fluctuations are influenced by interactions with guest molecules. A physical model is presented to explain the atomic-level chemistry and structure of these thermally regulated micropores, which is crucial to systematic engineering of new functional materials such as tunable molecular sieves, gated membranes and controlled-release nanocontainers. The model was validated experimentally with H 2 , N 2 , Ar and CH 4 on three classes of microporous materials: trapdoor zeolites, supramolecular host calixarenes and metal-organic frameworks. We demonstrate how temperature can be exploited to achieve appreciable hydrogen and methane storage in such materials without sustained pressure. These findings also open new avenues for gas sensing and isotope separation.
Publisher: American Chemical Society (ACS)
Date: 08-02-2022
Publisher: Royal Society of Chemistry (RSC)
Date: 2023
DOI: 10.1039/D2GC04877A
Abstract: Post-combustion carbon capture from fossil fuels for concentrated sources such as power plants is considered as one of the efficient ways to mitigate CO 2 emissions.
Publisher: American Chemical Society (ACS)
Date: 13-09-2021
DOI: 10.1021/JACS.1C06230
Publisher: Elsevier BV
Date: 08-2016
Publisher: Springer Science and Business Media LLC
Date: 06-09-2023
Publisher: American Chemical Society (ACS)
Date: 10-01-2023
Publisher: Wiley
Date: 17-01-2022
DOI: 10.1002/AIC.17569
Abstract: Conventional pressure swing adsorption (PSA) processes can only produce one high purity product in a single stage, whereas the state‐of‐art dual‐reflux PSA (DR‐PSA) can produce two high purity products simultaneously. However, multicomponent gas separation is often required in the industry, targeting at recovering several valued products at the same time. In this study, we propose a novel adsorption process, namely triple‐reflux PSA (TR‐PSA), to separate three components simultaneously. A middle product outlet and a middle reflux stream were introduced to the adsorption columns of a conventional DR‐PSA process to separate ternary mixtures of nitrogen, methane, and helium. Nonisothermal dynamic models were built to investigate the impacts of operating parameters particularly the location of the middle reflux roduct stream and the middle reflux flow rates. Results showed that the TR‐PSA process successfully separated ternary mixtures obtaining three enriched products simultaneously in a single stage, yielding a separation performance comparable to that of the double‐stage DR‐PSA with significantly lower capital and energy cost.
Publisher: Wiley
Date: 08-03-2022
DOI: 10.1002/AIC.17668
Abstract: The separation of methane (CH 4 ) and nitrogen (N 2 ) is a significant challenge to the enrichment and utilization of low concentration CH 4 due to the similarity in the physical and chemical properties of the two molecules. In this work, we investigated the separation of CH 4 from N 2 using 100 kg of a new ionic liquidic zeolite (ILZ) material in a 6‐bed pilot‐scale pressure swing adsorption process. Feed gases with CH 4 concentrations of 5.0% and 16.1% were upgraded to 11.5% and 34.6%, respectively, with CH 4 recoveries higher than 80%. The pilot test results were used to anchor a numerical model that then allowed the efficient investigation of multiple operational parameters including desorption pressure and feed gas flow rates. The numerical model produced CH 4 concentrations for both product streams consistent with those measured in the pilot experiments, with root mean square deviations below 2%. The modeling results revealed that sufficiently low desorption pressures can unexpectedly lead to lower heavy product purities under limited feed gas flow conditions. Furthermore, the optimum feed gas flow rate under which maximum heavy product purity is achieved increases with lower desorption pressure. The maximum CH 4 concentrations increased from 31.8% to 41.5%, as desorption pressures decreased from 22.8 to 12.2 kPa for optimum feed flow rates between 78.2 and 105.5 mol/h. We also demonstrate a method of process optimization based on the bed capacity ratio, ℂ, which provides a scale‐independent measure of the degree to which the column is being used effectively. By varying feed flow rate and/or desorption pressure, ℂ values between 0.2 and 0.8 were explored, with maxima in the combined separation performance metric (methane recovery) × (methane purity) occurring for values of ℂ in the range 0.29–0.36. This separation performance optimization by adjusting ℂ provides an effective strategy for integrating and understanding the impact of multiple operating parameters.
Publisher: American Chemical Society (ACS)
Date: 31-08-2021
Publisher: Elsevier BV
Date: 09-2019
Publisher: American Chemical Society (ACS)
Date: 04-03-2021
Publisher: American Chemical Society (ACS)
Date: 28-02-2023
Publisher: American Chemical Society (ACS)
Date: 06-01-2020
Abstract: Normal temperature catalytic ozonation (NTCO) is a promising yet challenging method for the removal of volatile organic compounds (VOCs) because of limited activity of the catalysts at ambient temperature. Here, we report a series of Pt/FeO
Publisher: Wiley
Date: 16-08-2021
DOI: 10.1002/AIC.17390
Abstract: Dual‐reflux pressure swing adsorption (DR‐PSA) is a state‐of‐art adsorption technology claiming to achieve both high product purity and recovery. However, its performance is inevitably limited by the gas mixing problem at the feed inlet position in adsorption columns, where a discontinuity in the columns' axial concentration profiles disturbs the separation. Here, we developed a dynamic‐feed DR‐PSA (DF‐DR‐PSA) process to solve the mixing problem and obtain better separation performance by introducing multiple feed inlets along the column. The DF‐DR‐PSA process was demonstrated by enrichment methane (CH 4 ) from a binary gas mixture containing 2.4 mol.% CH 4 in nitrogen (N 2 ) using activated carbon material. Non‐isothermal dynamic models were constructed to investigate the effects of operating parameters on the separation performance. The results showed the DF‐DR‐PSA process achieved both higher methane purity (53.5% vs. 47.5%) and recovery (81.1% vs. 72.2%) over the conventional DR‐PSA process at the same energy consumption.
Publisher: American Chemical Society (ACS)
Date: 28-04-2023
Publisher: Royal Society of Chemistry (RSC)
Date: 2021
DOI: 10.1039/D0CP04690F
Abstract: Lithium (Li)-doped polycyclic aromatic hydrocarbons showed a high potential for N 2 removal from natural gas. Li doping significantly increases the gas adsorption energies resulting in considerable N 2 adsorption selectivity.
Publisher: Research Square Platform LLC
Date: 15-07-2021
DOI: 10.21203/RS.3.RS-691931/V1
Abstract: Hydrogen gas (H 2 ) produced by water splitting using renewable energy, namely green hydrogen, is the most promising energy carrier of the low-carbon economy 1–6 . However, the geographic mismatch between renewables distribution and freshwater availability poses a significant challenge to green hydrogen production 7–9 . Here, we demonstrate a method of directly producing H 2 from the air, namely, capturing freshwater from the atmosphere using hygroscopic electrolyte and converting it to H 2 by electrolysis powered by solar energy. A prototype H 2 generator has been successfully established and operated for 12 consecutive days with a stable performance at an average Faradaic efficiency around 95%. This so-called direct air electrolysis (DAE) module can work under low relative humidity (20%) environment, overcoming water supply issues and producing green hydrogen sustainably with minimal impact to the environment. The DAE modules can be easily scaled to provide H 2 to remote, arid/semi-arid, and scattered areas.
Publisher: Springer Science and Business Media LLC
Date: 06-09-2022
DOI: 10.1038/S41467-022-32652-Y
Abstract: Green hydrogen produced by water splitting using renewable energy is the most promising energy carrier of the low-carbon economy. However, the geographic mismatch between renewables distribution and freshwater availability poses a significant challenge to its production. Here, we demonstrate a method of direct hydrogen production from the air, namely, in situ capture of freshwater from the atmosphere using hygroscopic electrolyte and electrolysis powered by solar or wind with a current density up to 574 mA cm −2 . A prototype of such has been established and operated for 12 consecutive days with a stable performance at a Faradaic efficiency around 95%. This so-called direct air electrolysis (DAE) module can work under a bone-dry environment with a relative humidity of 4%, overcoming water supply issues and producing green hydrogen sustainably with minimal impact to the environment. The DAE modules can be easily scaled to provide hydrogen to remote, (semi-) arid, and scattered areas.
Start Date: 2014
End Date: 12-2016
Amount: $376,970.00
Funder: Australian Research Council
View Funded ActivityStart Date: 02-2019
End Date: 04-2023
Amount: $646,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 03-2019
End Date: 09-2024
Amount: $600,000.00
Funder: Australian Research Council
View Funded ActivityStart Date: 04-2016
End Date: 12-2021
Amount: $4,571,797.00
Funder: Australian Research Council
View Funded Activity