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Active Fischer-Tropsch synthesis Fe-Cu-K/SiO_2 catalysts prepared by autocombustion method without a reduction step

Journal of Energy Chemistry 2018年第2期27卷 432-438页

作者： Suthasinee Pengnarapat Peipei Ai prasert reubroycharoen Tharapong Vitidsant Yoshiharu Yoneyama Noritatsu Tsubaki Program in Petrochemistry Faculty of ScienceChulalongkorn University Department of Applied Chemistry School of EngineeringUniversity of Toyama Department of Chemical Technology Faculty of ScienceChulalongkorn University

The purpose of this study was to prepare iron-based catalysts supported on silica by autocombustion method for directly using for Fischer-Tropsch synthesis（FTS） without a reduction step. The effect of different citric acid（CA）：iron nitrate（N） molar ratios and acid types on the FTS performance of catalysts were investigated. The CA：N molar ratios had an important influence on the formation of iron active phases and FTS activity. The iron carbide（FexC）, which is known to be one of the iron active phases, was demonstrated by the X-ray diffraction and X-ray photoelectron spectroscopy. Increasing the CA：N molar ratios up to 0.1 increased CO conversion of catalyst to 86.5%, which was then decreased markedly at higher CA：N molar ratios. An excess of CA resulted in carbon residues covering the catalyst surface and declined FTS activity. The optimal catalyst（CA：N molar ratio = 0.1） achieved the highest CO conversion when compared with other autocombustion catalysts as well as reference catalyst prepared by impregnation method, followed by a reduction step. The autocombustion method had the advantage to synthesize more efficient catalysts without a reduction step. More interestingly, iron-based FTS catalysts need induction duration at the initial stage of FTS reaction even after reduction, because metallic iron species need time to be transformed to FexC. But here, even if without reduction, FexC was formed directly by autocombustion and induction period was eliminated during FTS reaction.

关键词： Fischer-Tropsch synthesis Iron-based catalysts Autocombustion Iron carbide SiO2

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Analysis on the relationship between water resources and environmental change in Northern Thailand

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Global Energy Interconnection 2019年第3期2卷 270-275页

作者： Kensuke Yamaguchi Manaskorn Rachakarakij prasert reubroycharoen Institute for Future Initiatives The University of Tokyo 7-3-1 Hongo Bunkyo-ku Tokyo 113-0033 Japan Department of Environmental Engineering Chulalongkorn University Phyathai Rd. Pathumwan Bangkok 10330 Thailand Department of Chemical Technology Chulalongkorn University Phyathai Rd. Pathumwan Bangkok 10330 Thailand

How do people perceive environmental change when coping with scarcity? Previous studies on scarcity tend to overlook the aspect of perception. By analyzing repeated water conflicts in northern Thailand, this study she... 详细信息

关键词： Water conflict Water shortage Perception Social power

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Nanocellulose:Extraction and application

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Carbon Resources Conversion 2018年第1期1卷 32-43页

作者： Patchiya Phanthong prasert reubroycharoen Xiaogang Hao Guangwen Xu Abuliti Abudula Guoqing Guan Graduate School of Science and Technology Hirosaki University1-BunkyochoHirosaki 036-8560Japan Department of Renewable Energy Institute of Regional Innovation(IRI)Hirosaki University2-1-3MatsubaraAomori 030-0813Japan Department of Chemical Technology Chulalongkorn UniversityBangkok 10330Thailand Department of Chemical Engineering Taiyuan University of TechnologyTaiyuan 030024China Institute of Industrial Chemistry and Energy Technology Shenyang University of Chemical Technology(SYUCT)Shenyang 110142China

Recently,nanocellulose and its applications gain high attraction in both research and industrial areas due to its attractive properties such as excellent mechanical properties,high surface area,rich hydroxyl groups for modification,and natural properties with 100%environmental *** this review,the background of nanocellulose originated from lignocellulosic biomass and the typical extraction methods and general applications are summarized,in which the nanocellulose extraction methods related to ball milling are mainly ***,an outlook on its future is *** is expected to provide guidance on the effective extraction of nanocellulose from biomass and its most possible applications in the future.

关键词： Biomass Cellulose Nanocellulose fiber Extraction Application Outlook

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Ethanol steam reforming over Ni/ZSM-5 nanosheet for hydrogen production

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Chinese Journal of Chemical Engineering 2024年第3期67卷 247-256页

作者： Porapak Suriya Shanshan Xu Shengzhe Ding Sarayute Chansai Yilai Jiao Joseph Hurd Daniel Lee Yuxin Zhang Christopher Hardacre prasert reubroycharoen Xiaolei Fan Department of Chemical Engineering School of EngineeringThe University of ManchesterManchester M139PLUnited Kingdom Program of Petrochemistry and Polymer Science Faculty of ScienceChulalongkorn UniversityBangkok10330Thailand Shenyang National Laboratory for Materials Science Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China Liaoning Academy of Materials Shenyang 110167China Center of Excellence in Catalysis for Bioenergy and Renewable Chemicals(CBRC) andDepartment of Chemical TechnologyFaculty of ScienceChulalongkorn UniversityBangkok 10330Thailand Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo ChinaNingbo315100China

Compared to reforming reactions using hydrocarbons,ethanol steam reforming(ESR)is a sustainable alternative for hydrogen(H_(2))production since ethanol can be produced sustainably using *** work explores the catalyst design strategies for preparing the Ni supported on ZSM-5 zeolite catalysts to promote ***,two-dimensional ZSM-5 nanosheet and conventional ZSM-5 crystal were used as the catalyst carriers and two synthesis strategies,i.e.,in situ encapsulation and wet impregnation method,were employed to prepare the *** on the comparative characterization of the catalysts and comparative catalytic assessments,it was found that the combination of the in situ encapsulation synthesis and the ZSM-5 nanosheet carrier was the effective strategy to develop catalysts for promoting H_(2) production via ESR due to the improved mass transfer(through the 2-D structure of ZSM-5 nanosheet)and formation of confined small Ni nanoparticles(resulted via the in situ encapsulation synthesis).In addition,the resulting ZSM-5 nanosheet supported Ni catalyst also showed high Ni dispersion and high accessibility to Ni sites by the reactants,being able to improve the activity and stability of catalysts and suppress metal sintering and coking during ESR at high reaction ***,the Ni supported on ZSM-5 nanosheet catalyst prepared by encapsulation showed the stable performance with~88% ethanol conversion and~65% H_(2) yield achieved during a 48-h longevity test at 550-C.

关键词： ZSM-5 nanosheet In situ encapsulation Ni catalyst Ethanol steam reforming Hydrogen production

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Fabrication of fluoroalkylsilane/zeolitic imidazolate framework composites for highly efficient superhydrophobic coating

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Carbon Resources Conversion 2022年第1期5卷 26-34页

作者： Preyaphan Kheaw-in Chanatip Samart Narong Chanlek Phakkhananan Pakawanit prasert reubroycharoen Guoqing Guan Suwadee Kongparakul Suda Kiatkamjornwong Department of Chemistry Faculty of Science and TechnologyThammasat UniversityPathumthani 12120Thailand Bioenergy and Biochemical Refinery Technology Program Faculty of Science and TechnologyThammasat University12120Thailand Synchrotron Light Research Institute(Public Organization) 111 University AvenueMuang DistrictNakhon Ratchasima 30000Thailand Department of Chemical Technology Faculty of ScienceChulalongkorn University254 Phyathai RoadWangmaiPatumwanBangkok 10330Thailand Institute of Regional Innovation Hirosaki UniversityAomori 030-0813Japan Office of University Research Affairs Chulalongkorn University254 Phyathai RoadWangmaiPatumwanBangkok 10330Thailand FRST Academy of ScienceOffice of the Royal SocietySanam Suea PaKhet DusitBangkok 10300Thailand

Superhydrophobic bagasse paper was successfully engineered by facile spray coating with a zeolitic imidazolate framework composite modified by 3,3,3-trifluoropropyltrimethoxysilane(FAS)and used as a filter membrane with special wettability for oil/water *** characteristics such as surface morphology,surface moieties,roughness,and wettability were *** addition of FAS decreased the apparent surface energy between solid surfaces and liquids with a polar contribution of surface free energy as low as 0 mN m−*** formation of the FAS layer was confirmed by transmission electron microscopy and X-ray photoelectron spectroscopy core-level ***-dimensional surface topography revealed an increase in the spray coating cycle that enhanced the hydrophobicity of the coated *** results confirmed that not only microstructures but also the presence of functional groups with low surface energy(such as FAS)can promote surface *** spray-coated paper with FAS/ZIF in the presence of a small amount of nanocellulose provided a superhydrophobic surface after the first spray *** separation efficiency was up to 85%and was slightly affected by oil ***,this can be used as a filter membrane for water-in-oil *** the present work,simple spray-coated paper is a promising candidate material for gravity-driven oil/water separation and water repellent coating.

关键词： Superhydrophobic surface Spray-coating Zeolitic imidazolate framework Oil/water separation

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Glycerol valorization through production of di-glyceryl butyl ether with sulfonic acid functionalized KIT-6 catalyst

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Carbon Resources Conversion 2020年第1期3卷 182-189页

作者： Thi Tuong Vi Tran Maytinee Obpirompoo Suwadee Kongparakul Surachai Karnjanakom prasert reubroycharoen Guoqing Guan Narong Chanlek Chanatip Samart Department of Chemistry Faculty of Science and TechnologyThammasat UniversityPathumthani 12120Thailand Thammasat University Research Unit in Bioenergy and Catalysis(BCRU) Thammasat UniversityPathumtani 12120Thailand Department of Chemistry Faculty of ScienceRangsit UniversityPathumthani 12000Thailand Department of Chemical Technology Faculty of ScienceChulalongkorn UniversityBangkok 10330Thailand Institute of Regional Innovation Hirosaki UniversityAomori 030-0813Japan Synchrotron Light Research Institute(SLRI) 111 University AvenueMuang DistrictNakhon Ratchasima 30000Thailand

In this work,the etherification of glycerol with n-butanol catalyzed by sulfonic acid functionalized on KIT-6 mesoporous silica(SO_(3)H-KIT-6)was investigated for the production of valuable fuel *** SO_(3)H-KIT-6 catalyst was synthesized by co-condensation with different molar ratios of tetraethoxysilane and 3-mercaptopropyl(methyl)di-methoxy *** etherification reaction was systematically examined to determine the optimal reaction temperature,reaction time,catalyst loading,and glycerol to n-butanol ratio under autogenous *** maximum glycerol conversion and di-glyceryl n-butyl ether(di-GNBE)selectivity were 59.09 and 51.50%,respectively,when the SO_(3)H-KIT-6 catalyst with the highest acidity was ***,the presence of a methyl group on the catalyst surface prevented glycerol adsorption during the reaction process,leading to the inhibition of undesired product *** SO_(3)H-KIT-6 catalyst could be reused up to three times,with only a 13%decrease in glycerol conversion being ***,the superior performance of the SO_(3)H-KIT-6 catalyst for di-GNBE production was also demonstrated compared with conventional solid acid catalysts including HZSM-5,H-beta zeolite,Amberlyst-35,and Amberlyst-36.

关键词： Etherification Glycerol SO_(3)H-KIT-6 catalyst Valuable fuel additive di-GNBEs

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Catalytic conversion of bioethanol to value-added chemicals and fuels:A review

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Resources Chemicals and Materials 2022年第1期1卷 47-68页

作者： Huan Xiang Ruojia Xin Natthawan Prasongthum Paweesuda Natewong Tawan Sooknoi Jiawei Wang prasert reubroycharoen Xiaolei Fan Department of Chemical Engineering and Analytical Science School of EngineeringThe University of ManchesterManchester M139PLUnited Kingdom Department of Chemical Engineering and Applied Chemistry Aston UniversityBirminghamB47ETUnited Kingdom Expert Centre of Innovative Clean Energy and Environment Thailand Institute of Scientific and Technological Research(TISTR)35 Mu 3Khlong HaKhlong LuangPathum Thani 12120Thailand Clean Energy Technologies Research Institute(CETRI) Faculty of Engineering&Applied ScienceUniversity of ReginaReginaSaskatchewanS4S0A2Canada Department of Chemistry Faculty of ScienceKing Mongkut’s Institute of Technology LadkrabangBangkok 10520Thailand Center of Excellence in Catalysis for Bioenergy and Renewable Chemicals(CBRC) Faculty of ScienceChulalongkorn UniversityBangkok 10330Thailand

Bioethanol produced via valorisation of renewable biomass is of great interest to many *** increased availability and decreased cost of bioethanol make it a promising platform molecule to produce a wide range of value-added chemicals and fuels via the catalytic *** paper provides a comprehensive review of catalytic conversions of bioethanol to a variety of chemicals/fuels such as hydrogen,C_(2)-C_(4)olefins,gasoline and small ***,the focus was placed on the relationship between the catalyst property(such as pore structure,acidity,active metal sites,and catalyst supports)and the catalytic performance(including catalyst activity and stability),as well as the reaction mechanisms *** research avenues on the catalyst design for improving catalytic valorisation of bioethanol are also discussed.

关键词： Bioethanol Catalysis Hydrogen C_(2)-C_(4)olefins Gasoline Oxygenates

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Fischer–Tropsch synthesis on impregnated cobalt-based catalysts:New insights into the effect of impregnation solutions and pH value

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Journal of Energy Chemistry 2016年第6期25卷 994-1000页

作者： Chuang Xing Peipei Ai Peipei Zhang Xinhua Gao Ruiqin Yang Noriyuki Yamane Jian Sun prasert reubroycharoen Noritatsu Tsubaki School of Biological and Chemical Engineering Zhejiang University of Science and Technology Department of Applied Chemistry Graduate School of Engineering University of Toyama Advanced Technology Research 20-1 Laboratories Nippon Steel & Sumitomo Metal Corporation Dalian National Laboratory for Clean Energy (DNL) Dalian Institute of Chemical Physics Chinese Academy of Sciences Department of Chemical Technology Faculty of Science Chulalongkorn University

The Co-based catalysts were prepared with different cobalt acetate solutions. Effects of pH value were studied deeply on Fischer–Tropsch synthesis (FTS) through a semi-batch reactor. Among all impregnation solutions (water, butanol, amyl alcohol, acetic acid, nitric acid and ammonium nitrate), the catalyst prepared by NH4NO3solution showed the highest catalytic activity due to its small particle size and high reduction degree. However, the catalyst with the smallest particle size derived from water as impregnation solution exhibited low activity as well as high methane selectivity since it was difficult to be reduced and inactive in FTS. According to FT-IR spectra results, the low intensity of absorbed CO on the catalyst prepared from water solution resulted in low FTS activity. Whereas, the high activity of catalysts prepared from NH4NO3solution could be explained by the high intensity of absorbed CO on the catalysts. The cobalt species on the catalysts prepared under lower pH conditions exhibited smaller particle size distribution as well as lower CO conversion than those prepared at higher pH value. © 2016 Science Press

关键词： Batch reactors Catalyst selectivity Catalysts Cobalt Impregnation Particle size Particle size analysis pH pH effects

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Fe基催化剂物相演变及CO_(2)加氢反应性能影响

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燃料化学学报 2022年第12期50卷 1573-1580页

作者：梁洁王欣宇高新华田菊梅段斌张伟江永军 prasert reubroycharoen 张建利赵天生宁夏大学化学化工学院省部共建煤炭高效利用与绿色化工国家重点实验室宁夏银川750021 国家能源集团宁夏煤业有限责任公司煤炭化学工业技术研究院宁夏银川750411 宁夏计量质量检验检测研究院国家煤及煤化工产品质量检验检测中心(宁夏) 宁夏银川750200 朱拉隆功大学理学院化学工艺系生物能源和可再生化学品催化卓越中心泰国曼谷10330

本研究使用原位X射线衍射(in-situ XRD)技术,对Na/Fe_(2)O_(3)样品的还原及活化过程进行了原位表征,探究了Na含量、预处理气氛对Fe基催化剂物相的影响,并研究了铁氧化合物与铁碳化合物在CO_(2)加氢过程中的协同作用。结合H_(2)-TPR、CO+... 详细信息

本研究使用原位X射线衍射(in-situ XRD)技术,对Na/Fe_(2)O_(3)样品的还原及活化过程进行了原位表征,探究了Na含量、预处理气氛对Fe基催化剂物相的影响,并研究了铁氧化合物与铁碳化合物在CO_(2)加氢过程中的协同作用。结合H_(2)-TPR、CO+H_(2)-TPSR-MS手段对催化剂样品进行了物化性质表征。结果表明,还原气氛为H_(2)时,Na助剂修饰会抑制Fe_(2)O_(3)催化剂还原;然而还原气氛为合成气(CO/H_(2)=1∶2)时,适量Na助剂会降低还原和活化温度,提高碳化铁含量。采用H_(2)和合成气分别对Fe基催化剂进行还原处理,低碳烯烃选择性由0.3%提高至20.2%,CO_(2)转化率由7.3%提升至25.8%;与纯Fe_(2)O_(3)相比,Na修饰后催化剂Fe_(5)C_(2)含量从8.5%提高到38.4%,C_(5+)选择性由7.8%提升至37.0%,CH_(4)选择性从43.2%降至14.9%。催化剂通过调节还原气氛和Na助剂修饰量有效调控Fe_(3)O_(4)和Fe_(5)C_(2)物相比例,提升Fe基催化剂CO_(2)加氢活性和产物选择性。

关键词： in-situ XRD Fe基催化剂 Na助剂还原气氛物相变化

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Batch studies of adsorption of copper and lead on activated carbon from Eucalyptus camaldulensis Dehn. bark

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Journal of Environmental Sciences 2008年第9期20卷 1028-1034页

作者： Phussadee Patnukao Apipreeya Kongsuwan prasert Pavasant National Center of Excellence for Environmental and Hazardous Waste Management Chulalongkorn University Department of Chemical Engineering Faculty of Engineering Chulalongkorn University

Powdered activated carbon (PAC) prepared from Eucalyptus camaldulensis Dehn. bark was tested for its adsorption capacity for Cu(Ⅱ) and Pb(Ⅱ). The experiment was conducted to investigate the effects of pH, contact time, initial metal concentration, and temperature. The best adsorption of both Cu(Ⅱ) and Pb(Ⅱ) occurred at pH 5, where the adsorption reached equilibrium within 45 min for the whole range of initial heavy metal concentrations (0.1-10 mmol/L). The adsorption kinetics was found to follow the pseudo-...

关键词： heavy metal removal isotherm kinetics enthalpy of adsorption sorption

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