ORCID Profile
0000-0002-4888-156X
Current Organisation
Edith Cowan University
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Publisher: Informa UK Limited
Date: 05-2007
DOI: 10.1080/09593332808618810
Abstract: Activated carbon with large specific surface area and well-developed porosity was prepared from pyrolysis of K2CO3-impregnated lignin precipitated from reed pulp black liquors. The impregnation ratio was 1:1. The effect of activation temperature upon the Brunauer-Emmett-Teller (BET) specific surface area and pore volume of the carbon was closely investigated. Increasing activation temperature led to an opening and widening of the porous structure below 800'C. Above 800'C, the excess widening of pore led to the decrease of BET surface area and micropore volume. The BET surface area and pore volume of the carbon activated at 800 degrees C were 1395 m(2) g(-1) and 0.7702 ml g(-1) , respectively. The potential application of the carbon activated at 800 degrees C for removal of Cr (VI) was also investigated. The experimental results showed that it had good adsorption capacity.
Publisher: Elsevier BV
Date: 02-2016
Publisher: Hindawi Limited
Date: 06-12-2019
DOI: 10.1002/ER.5030
Publisher: Elsevier BV
Date: 09-2010
Publisher: Elsevier BV
Date: 09-2011
Publisher: Hindawi Limited
Date: 21-12-2018
DOI: 10.1002/ER.4342
Publisher: Elsevier BV
Date: 02-2022
Publisher: Elsevier BV
Date: 08-2021
Publisher: Springer Science and Business Media LLC
Date: 10-2016
Publisher: Wiley
Date: 23-02-2016
DOI: 10.1002/APJ.1983
Publisher: Informa UK Limited
Date: 2010
DOI: 10.1080/09593330903338411
Abstract: Activated carbon was produced by fast precarbonization of cornstalk lignin in a fluidized bed followed by K2CO3 activation. The results showed that the product is essentially microporous carbon whose Brunauer-Emmett-Teller surface area and pore volume when the carbon was activated at 800 degrees C were 1410 m2/g and 0.77 mL/g, respectively. The potential usefulness of the resultant carbons for removal of phenol from water and their subsequent bioregeneration capabilities were also investigated. The kinetics study showed that all the carbons exhibited a fast adsorption rate and the carbon activated at 800 degrees C had the largest amount of phenol adsorbed due to its greater specific surface area and pore volume. The adsorption isotherms by applying the Langmuir method showed that the monolayer adsorption capacity of carbon activated at 800 degrees C could reach 110.9 mg/g.
Publisher: Elsevier BV
Date: 09-2022
Publisher: National Library of Serbia
Date: 2012
Abstract: The self-made KOH together with NH4OH pulping of corn stover was investigated. The combined alkaline system could effectively remove lignin during pulping. There are three stages of lignin removal during delginification. Approximately 90% of lignin could be removed after temperature reached 150?C for over 30 minutes. The p-hydroxyl phenol groups in lignin could be completely removed during the delignification reaction. The tendency of the increase of the crystalline degree of cellulose is observed with increase of reaction temperature. The kinetics of delignification is found to be the first order with respect to the remained lignin and the 0.4 order with respect to the remained hydroxide concentration. The activation energy of delignification is 23 kJ/mol. The solution obtained from precipitation of lignin is rich in nitrogen, phosphorous, potassium elements and organic matters. Various techniques including FT-IR, GPC, DSC, were applied to characterize the acid precipitated lignin. The result shows that the lignin with the polydispersity of 1.4 still maintains the p-coumaryl, coniferyl, and sinapyl units in its matrix.
Publisher: Wiley
Date: 07-07-2011
DOI: 10.1002/APJ.605
Publisher: American Chemical Society (ACS)
Date: 04-10-2021
Publisher: American Chemical Society (ACS)
Date: 05-07-2011
DOI: 10.1021/IE1024003
Publisher: American Chemical Society (ACS)
Date: 24-05-2021
Publisher: MDPI AG
Date: 07-07-2021
DOI: 10.3390/J4030022
Abstract: The current hydrogen generation technologies, especially biomass gasification using fluidized bed reactors (FBRs), were rigorously reviewed. There are involute operational parameters in a fluidized bed gasifier that determine the anticipated outcomes for hydrogen production purposes. However, limited reviews are present that link these parametric conditions with the corresponding performances based on experimental data collection. Using the constructed artificial neural networks (ANNs) as the supervised machine learning algorithm for data training, the operational parameters from 52 literature reports were utilized to perform both the qualitative and quantitative assessments of the performance, such as the hydrogen yield (HY), hydrogen content (HC) and carbon conversion efficiency (CCE). Seven types of operational parameters, including the steam-to-biomass ratio (SBR), equivalent ratio (ER), temperature, particle size of the feedstock, residence time, lower heating value (LHV) and carbon content (CC), were closely investigated. Six binary parameters have been identified to be statistically significant to the performance parameters (hydrogen yield (HY)), hydrogen content (HC) and carbon conversion efficiency (CCE) by analysis of variance (ANOVA). The optimal operational conditions derived from the machine leaning were recommended according to the needs of the outcomes. This review may provide helpful insights for researchers to comprehensively consider the operational conditions in order to achieve high hydrogen production using fluidized bed reactors during biomass gasification.
Publisher: Hindawi Limited
Date: 22-11-2019
DOI: 10.1002/ER.4990
Publisher: Wiley
Date: 09-08-2020
DOI: 10.1002/EP.13485
Publisher: Wiley
Date: 17-03-2017
DOI: 10.1002/EP.12591
Publisher: Elsevier BV
Date: 06-2023
Publisher: Informa UK Limited
Date: 10-03-2016
DOI: 10.1080/09593330.2016.1151463
Abstract: The biochar was produced from fast pyrolysis of reed black liquor using fluidized bed. Response surface methodology and the central composite design (CCD) were employed for determining optimal adsorbents with maximum H2S removal capacity. The operational parameters such as carbonization temperature (°C), duration (min) and space velocity (SV, L min(-1) kg(-1)) were chosen as independent variables in CCD. The statistical analysis indicates that the effects of carbonization temperature, duration, SV and combined effect of carbonization temperature and duration are all significant to the H2S removal capacity. The optimal condition for achieving the maximum H2S adsorption capacity for biochar is obtained as the follows: carbonization temperature (500°C), duration (5.7 min), SV (7300 L min(-1) kg(-1)) with H2S removal reaching 60 mg g(-1). The dynamic experimental results indicate a good performance in H2S removal by the produced biochar.
Publisher: Elsevier BV
Date: 10-2022
Publisher: Elsevier BV
Date: 06-2016
Publisher: National Library of Serbia
Date: 2014
Abstract: The hydrolysis of corn stover using hydrochloric acid was studied. The kinetic parameters of the mathematical models for predicting the yields of xylose, glucose, furfural and acetic acid were obtained, and the corresponding xylose generation activation energy of 100 kJ/mol was determined. The characterization of corn stover using with different techniques during hydrolysis indicated an effective removal of xylan and the slightly alteration on the structures of cellulose and lignin. A 23five levels Central Composite Design (CCD) was used to develop a statistical model for the optimization of process variables including acid concentration, pretreatment temperature and time. The optimum conditions determined by this model were found to be 108?C for 80 minutes with acid concentration of 5.8%. Under these conditions, the maximised results are the following: xylose 19.93 g/L, glucose 1.2 g/L, furfural 1.5 g/L, acetic acid 1.3 g/L. The validation of the model indicates a good agreement between the experimental results and the predicted values.
Publisher: Wiley
Date: 02-09-2014
DOI: 10.1002/EP.11828
Publisher: Springer Science and Business Media LLC
Date: 30-07-2016
Publisher: Elsevier BV
Date: 04-2017
Publisher: Elsevier BV
Date: 02-2022
DOI: 10.1016/J.JHAZMAT.2021.127583
Abstract: Catalytic oxidation is a promising approach to eliminating formaldehyde (HCHO) to improve indoor air quality. Herein, CeO
Publisher: American Chemical Society (ACS)
Date: 07-07-2022
Publisher: Elsevier BV
Date: 06-2016
Publisher: Elsevier BV
Date: 05-2018
Publisher: Wiley
Date: 06-06-2023
Abstract: Volatile organic compounds (VOCs) are prominent air pollutants, hazardous to human health and the environment. Sunlight is a sustainable energy source capable of meeting the demands for heterogeneous catalysis. Photothermal catalysis has emerged as an energy‐efficient technology for VOCs oxidation by merging the advantages of thermochemistry and photocatalysis. This review examines the advantages of the photothermal catalytic system, such as the absorption and conversion of solar light, accelerated reaction rates, and improved product selectivity. The photothermal catalytic system is clearly categorized according to the significant contributions of light and thermal energy to the reaction. As a result of the direct conversion of photons into thermal energy to surpass the light‐off temperature and drive the catalytic reaction, an le discussion of light‐induced thermal catalytic processes is presented. Furthermore, the participation of the localized surface plasmon resonance effect and oxygen vacancies in the surface reaction under irradiation and thermal energy are spotlighted. A comprehensive discussion is provided for the various photothermal active nanostructures. The underlying superior resistance mechanism to water vapour and coke formation as well as high oxygen concentrations in photothermal catalytic system are emphatically highlighted. Finally, current research trends and prospects are discussed.
Publisher: Wiley
Date: 15-12-2011
Publisher: Wiley
Date: 19-01-2007
DOI: 10.1002/EP.10181
Publisher: Elsevier BV
Date: 03-2012
DOI: 10.1016/J.JHAZMAT.2012.01.053
Abstract: The use of an industry waste, brown coal fly ash collected from the Latrobe Valley, Victoria, Australia, has been tested for the post-combustion CO(2) capture through indirect minersalization in acetic acid leachate. Upon the initial leaching, the majority of calcium and magnesium in fly ash were dissolved into solution, the carbonation potential of which was investigated subsequently through the use of a continuously stirred high-pressure autoclave reactor and the characterization of carbonation precipitates by various facilities. A large CO(2) capture capacity of fly ash under mild conditions has been confirmed. The CO(2) was fixed in both carbonate precipitates and water-soluble bicarbonate, and the conversion between these two species was achievable at approximately 60°C and a CO(2) partial pressure above 3 bar. The kinetic analysis confirmed a fast reaction rate for the carbonation of the brown coal ash-derived leachate at a global activation energy of 12.7 kJ/mol. It is much lower than that for natural minerals and is also very close to the potassium carbonate iperazine system. The CO(2) capture capacity of this system has also proven to reach maximum 264 kg CO(2)/ton fly ash which is comparable to the natural minerals tested in the literature. As the fly ash is a valueless waste and requires no comminution prior to use, the technology developed here is highly efficient and energy-saving, the resulting carbonate products of which are invaluable for the use as additive to cement and in the paper and pulp industry.
Publisher: Wiley
Date: 05-10-2019
DOI: 10.1002/EP.13053
Publisher: Springer Science and Business Media LLC
Date: 13-01-2022
DOI: 10.1007/S10532-021-09969-4
Abstract: Petroleum-based plastics (PBP) with different properties have been developed to suit various needs of modern lives. Nevertheless, these well-developed properties also present the double-edged sword effect that significantly threatens the sustainability of the environment. This work focuses on the impact of microbial cultivating conditions (the elementary compositions and temperature) to provide insightful information for the process optimization of microbial degradation. The major elementary compositions in cultivation media and temperature from the literature were radically reviewed and assessed using the constructed supervised machine learning algorithm. Fifty-two literatures were collected as a training dataset to investigate the impact of major chemical elements and cultivation temperature upon PBP biodegradation. Among six singular parameters (NH
Publisher: Wiley
Date: 20-04-2016
DOI: 10.1002/EP.12365
Publisher: Elsevier BV
Date: 06-2022
Publisher: Elsevier BV
Date: 2016
Publisher: Wiley
Date: 20-10-2010
DOI: 10.1002/EP.10503
Publisher: Wiley
Date: 24-05-2017
DOI: 10.1002/APJ.2094
Publisher: Elsevier BV
Date: 12-2017
Publisher: MDPI AG
Date: 13-05-2020
DOI: 10.3390/EN13102451
Abstract: This paper reviews the current technological development of bio-hydrogen (BioH2) generation, focusing on using lignocellulosic feedstock via dark fermentation (DF). Using the collected reference reports as the training data set, supervised machine learning via the constructed artificial neuron networks (ANNs) imbedded with feed backward propagation and one cross-out validation approach was deployed to establish correlations between the carbon sources (glucose and xylose) together with the inhibitors (acetate and other inhibitors, such as furfural and aromatic compounds), hydrogen yield (HY), and hydrogen evolution rate (HER) from reported works. Through the statistical analysis, the concentrations variations of glucose (F-value = 0.0027) and acetate (F-value = 0.0028) were found to be statistically significant among the investigated parameters to HY and HER. Manipulating the ratio of glucose to acetate at an optimal range (approximate in 14:1) will effectively improve the BioH2 generation (HY and HER) regardless of microbial strains inoculated. Comparative studies were also carried out on the evolutions of electron equivalent balances using lignocellulosic biomass as substrates for BioH2 production across different reported works. The larger electron sinks in the acetate is found to be appreciably related to the higher HY and HER. To maintain a relative higher level of the BioH2 production, the biosynthesis needs to be kept over 30% in batch cultivation, while the biosynthesis can be kept at a low level (2%) in the continuous operation among the investigated reports. Among available solutions for the enhancement of BioH2 production, the selection of microbial strains with higher capacity in hydrogen productions is still one of the most phenomenal approaches in enhancing BioH2 production. Other process intensifications using continuous operation compounded with synergistic chemical additions could deliver additional enhancement for BioH2 productions during dark fermentation.
Publisher: American Chemical Society (ACS)
Date: 11-07-2022
Publisher: Elsevier BV
Date: 10-2017
Publisher: Wiley
Date: 23-04-2023
Abstract: All‐solid‐state lithium‐oxygen (Li‐O 2 ) battery is considered to be a promising next‐generation energy storage system to address the issues related to low specific capacity, unsafety and unstable electrochemistry that exist in conventional liquid Li‐O 2 batteries. However, current solid‐state Li‐O 2 batteries still encounter the challenge of high impedance at the electrode/electrolyte interface. In addition, the deficiency of triple‐phase boundaries (containing Li + , e − and O 2 ) limits the active sites for electrochemical reaction in the battery cathode. Herein, an integrated architecture based on a garnet electrolyte Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) and a porous composite cathode for high‐performance all‐solid‐state Li‐O 2 batteries is developed. The unique internal structure effectively reduces the interfacial impedance of the battery, provides a large number of active sites at triple‐phase boundaries and increases the electrochemical stability. As a result, the obtained batteries can deliver a superior high full discharge capacity of 13.04 mA h cm −2 and an excellent cyclic performance (86 cycles). In addition, X‐ray photoelectron spectroscopy, differential electrochemical mass spectrometry and theoretical calculations further demonstrate the effectiveness of this design in enhancing the interfacial performance, electrochemical performance, and stability of the battery. This study is thus expected to facilitate practical applications for truly all‐solid‐state Li‐O 2 batteries, and even for other systems of metal‐oxygen (air) batteries.
Publisher: Wiley
Date: 15-07-2017
DOI: 10.1002/EP.12696
Publisher: MDPI AG
Date: 11-04-2019
DOI: 10.3390/CATAL9040353
Abstract: Bio-hydrogen production (BHP) produced from renewable bio-resources is an attractive route for green energy production, due to its compelling advantages of relative high efficiency, cost-effectiveness, and lower ecological impact. This study reviewed different BHP pathways, and the most important enzymes involved in these pathways, to identify technological gaps and effective approaches for process intensification in industrial applications. Among the various approaches reviewed in this study, a particular focus was set on the latest methods of chemicals/metal addition for improving hydrogen generation during dark fermentation (DF) processes the up-to-date findings of different chemicals/metal addition methods have been quantitatively evaluated and thoroughly compared in this paper. A new efficiency evaluation criterion is also proposed, allowing different BHP processes to be compared with greater simplicity and validity.
Publisher: Elsevier BV
Date: 02-2015
Publisher: Wiley
Date: 28-08-2023
Abstract: Solid‐state lithium‐air batteries (SSLABs) are attracting widespread research interest as emerging energy storage systems with ultra‐high theoretical energy density. However, due to their relatively short development history, the practical capacity and cyclic performance of SSLABs still fail to meet application requirements. The selection of solid electrolytes and the design and optimization of air cathodes are key factors for developing high‐performance solid‐state lithium‐air batteries. In this review, we focus on recent scientific advances and challenges in SSLABs, providing a comprehensive overview of solid electrolytes, air cathodes, and interface issues. Strategies such as electrolyte modification, composite cathodes, interface engineering, and the addition of catalysts which have been effective in addressing issues related to low ionic conductivity of electrolytes, high interfacial impedance, sluggish kinetics of electrochemical reactions, and poor cycling stability, were reviewed and discussed. Furthermore, this review also discusses the prospects of SSLABs, aiming to inspire and provide references for the development of solid‐state lithium‐air batteries, as well as other metal‐air batteries.
No related grants have been discovered for Yong Sun.