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Plasma-Catalyzed One-Step Highly Selective Methane to Methanol Conversion Over Surface-Oxygen-Riched Ni/S-1

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SSRN 2023年

作者： Wang, Zikun Ji, Yufei Liu, Meiyin Chen, Gui Chen, Xiaomai Zhang, Yanshi Chen, Longwen Wu, Kang Ye, Daiqi Wu, Junliang School of Environment and Energy South China University of Technology Guangzhou510006 China Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control National Engineering Laboratory for VOCs Pollution Control Technology and Equipment Guangzhou510006 China

Plasma-catalyzed one-step conversion of methane to value-added liquid products has great potential for energy transformation and carbon-emission reduction. In present work, Ni/S-1 synergized with plasma exhibits the highest methane conversion and methanol selectivity with great improved energy efficiency, which is of application value. The excellent low-temperature redox activity, high specific surface area and high chemisorbed oxygen content of Ni/S-1 jointly contribute to the remarkable plasma catalytic performance. Mechanistic studies show that the plasma-excited oxygen was easily absorbed on the catalyst surface, and form Ni/S-1 with high content of surface oxygen, which drives the continuous methane partial oxidation reaction with high selectivity. It is anticipated that this work will stimulate the practical development of the methane-containing substances one-step conversion to liquid oxygenates with oxygen as oxidant under ambient conditions. © 2023, The Authors. All rights reserved.

关键词： Methane

Electrochemical deposited amorphous FeNi hydroxide electrode for oxygen evolution reaction

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Journal of Energy Chemistry 2022年第6期31卷 585-592,I0016页

作者： Zhengzhi Yin Runze He Yongcai Zhang Ligang Feng Xiang Wu Thomas Wågberg Guangzhi Hu College of Biological Chemical Sciences and EngineeringJiaxing UniversityJiaxing 314001ZhejiangChina School of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002JiangsuChina School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870LiaoningChina Institute for Ecological Research and Pollution Control of Plateau Lakes School of Ecology and Environmental ScienceYunnan UniversityKunming 650504LiaoningChina National Local Joint Engineering Laboratory to Functional Adsorption Material Technology for the Environmental Protection Soochow UniversitySuzhou 215123JiangsuChina Department of Physics UmeåUniversity90187 UmeåSweden

The electrodeposition approach is significant in electrode fabrication for practical ***,the electrodeposited amorphous NiFe hydroxide species for oxygen evolution reaction (OER) in water splitting reaction is demonstrated by revealing the synergistic effect influenced by the support electrode of Fe and Ni foil and the contents of Fe and Ni in the *** the electrodeposited samples have an amorphous structure and similar profiles of binding energy and chemical states for Fe and Ni as characterized by the spectroscopic *** the support effect and Fe/Ni synergistic effect are indeed observed for the varied catalytic performances observed for the different electrodes;the Ni foil supported catalyst exhibits much higher performance than that of the Fe foil supported catalyst,and the different redox potentials of Ni species in the different Fe/Ni electrode resulting from the Fe–Ni synergism are observed in the cyclic voltammetry curve *** surface roughness and the electrochemical surface area are also influenced by the support effect and the Fe/Ni ratio in the plating *** optimal electrode shows a very low overpotential of~200 mV to reach 10 mA cm^(-2),and very high catalytic stability by the consecutive cyclic voltammetry measurements and 20 h stability *** it has the largest electrochemical surface area,the highest catalytic efficiency for these active sites is also indicated by the specific activity and turnover frequency polarization *** current work shows the effective experience for the electrodeposited Fe/Ni based catalysts in large-scale fabrication,which can be more practical for hydrogen generation in the alkaline water electrolysis.

关键词： Electrodeposition Amorphous structure NiFe hydroxide Oxygen evolution reaction Alkaline water electrolysis

Volatile Organic Compounds (vocs) Emissions from Internal Floating-Roof Tank in Oil Depots in Beijing: Influencing Factors and Emission Reduction Strategies Analysis

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SSRN 2023年

作者： Yang, Hongling Ren, Biqi Huang, Yuhu Zhang, Zhongshen Hu, Wei Liu, Mingyu Zhao, Huan Jiang, Guoxia Hao, Zhengping Beijing Key Laboratory for VOCs Pollution Prevention and Treatment Technology Application of Urban Air Beijing Municipal Research Institute of Eco-Environmental Protection Beijing100037 China National Engineering Laboratory for VOCs Pollution Control Material & Technology Research Center for Environmental Material and Pollution Control Technology University of Chinese Academy of Sciences Beijing101408 China School of Environmental Science and Engineering Tianjin University Tianjin300027 China Beijing Vehicle Emission Management Center Beijing100176 China

The internal floating-roof tank is the main type of storage tank for refined oil products. The volatile organic compounds (vocs) emission from the internal floating-roof tank plays a dominant role in the unorganized emission source of the oil depot. In this study, we selected six typical oil depots in Beijing to investigate VOC emission characteristics from the tank top vent hole using infrared imaging technology and flame ionization detector (FID). The results reveal that infrared thermal imager is efficient in quickly identifying the emission level of the tank discharge point. The ambient temperature and wind speed have a direct effect on sealing loss, the turnover can greatly influence the wall hanging loss, and the concentration of vocs emitted from the tank top vent hole is negatively correlated with liquid height. Furthermore, the influence of accessories type of the internal floating-roof tank on the concentration of vocs emission from the top vent hole is also studied when other parameters remain unchanged, and find the the floating deck type and sealing mode have a significant influence on their vocs emissions, of which the combination of pontoon type floating deck and secondary seal are effective in controlling the concentration of vocs emitted from the tank top vent hole. Finally, based on our experimental results, several feasible emission reduction strategies are proposed in terms of source prevention and process control in order to achieve the fine management of the whole process. This paper provides important technical support and policy thoughts for vocs emission control during oil storage. © 2023, The Authors. All rights reserved.

关键词： Volatile organic compounds

Cr(Vi) Secondary pollution in Cr(Iii)-Containing Waste Residue Triggered by Sulfite Under Visible Light Irradiation: The Formation of •Oh and Fe(V)

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SSRN 2022年

作者： Lei, Dashi Gui, Wanting Zhang, Shuai Peng, Xiangyu Xiao, Wei Zhang, Jing Xue, Juanqin Wang, Yubin School of Resources Engineering Xi’an University of Architecture and Technology Xi’an710055 China Department of Chemical Engineering Xi’an University of Architecture and Technology Xi’an710055 China National Engineering Laboratory for VOCs Pollution Control Materials & Technology Research Center for Environmental Material and Pollution Control Technology University of Chinese Academy of Sciences Beijing101408 China

The reduced chromite ore processing residue (rCOPR) deposited in environments causes reoccurrence of Cr(VI), resulting in serious secondary pollution. In this work, we studied the release and oxidation behaviors of Cr(III)–Fe(III) hydroxide under visible light, in presence of sulfite, the common reductant in rCOPR. At acidic conditions, only Cr(III) released from CrxFe1−x(OH)3 under light, while a large amount of Cr(VI) was produced after adding sulfite. At basic pH of 9, there is still 1.71 μM Cr(VI) released into environment. Radicals fitting results reveal that sulfite triggers radical chain reactions and promotes hydroxyl radical (•OH) production, which is responsible for Cr(III) oxidation and dissolution at acidic conditions. XANES and HPLC-MS analysis demonstrate the formation of Fe(V) on solid surface, which leads to the oxidation of Cr(III) into Cr(VI) through non-radical mechanism. Moreover, coarsening grain size was proposed to enhance solid stability, and Cr(VI) release efficiency significantly decreased 93.57%. © 2022, The Authors. All rights reserved.

关键词： Oxidation

Synthesis and characterization of biphenyldicarboxylic acid-modified poly(1,4-cyclohexylenedimethylene terephthalate) copolyesters

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Journal of Macromolecular Science, Part A 2022年第2期59卷 148-157页

作者： Tao Song Qingyin Wang Jianguo Li Xuejun Chen Shaoying Liu Gongying Wang a Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu Sichuan Chinab National Engineering Laboratory for VOCs Pollution Control Material & Technology University of Chinese Academy of Sciences Beijing China a Chengdu Institute of Organic Chemistry Chinese Academy of Sciences Chengdu Sichuan China

A new copolyesters of poly(1,4-cyclohexylenedimethylene terephthalate-co-4,4’-biphenydicarboxylate) (PCTB) with different compositions were synthesized from terephthalic acid, 1,4-cyclohexanedimethanol and 4,4’-biphenyldicarboxylic acid (BDA) via esterification-polycondensation reaction. The synthesized copolyesters were analyzed by1H-NMR,13C-NMR, FT-IR, GPC, intrinsic viscosity, DSC, TGA and tensile testing, respectively. The1H-NMR,13C-NMR and FT-IR results verify the successful introduction of BDA into poly(1,4-cyclohexylenedimethylene terephthalate (PCT) chains. The introduction of BDA into PCT chains can effectively lower the melting point of PCT, making it easier to process. The glass transition temperature of PCTB is higher than 103 °C and its thermal stability is better than that of PCT. The rheological tests confirm the enhanced melting stability of PCT after introducing BDA into PCT chains. Furthermore, the PCTB, which owns the comparable mechanical properties to PCT, is a tough polymer with the higher Young’s modulus (above 230 MPa), the higher tensile strength (above 41 MPa) and the higher elongation at break (above 159%).Graphical Abstract

关键词： Terephthalic acid 1 4-cyclohexanedimethanol 4 4’-biphenyldicarboxylic acid copolyesters processibility

Insight to the Reaction Routes of Co2 Oxidative Dehydrogenation of Ethane to Ethylene: Analysis Driven by Experimental Data and Simplified Through Tandem-Reaction Couplings

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SSRN 2023年

作者： Wang, Ying Jin, Yuxin Chen, Ming Zhong, Zhiyong Zhao, Yun Huang, Haomin Ye, Daiqi Chen, Limin Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control School of Environment and Energy South China University of Technology Guangzhou510006 China National Engineering Laboratory for VOCs Pollution Control Technology and Equipment South China University of Technology Guangzhou510006 China

The complicated reaction networks of ethane oxidative dehydrogenation with CO2 (CO2-ODHE) significantly inhibit the researchers to clearly understand the intrinsic catalytic behaviors, causing the irrational catalyst design. The tandem-reaction couplings have been proposed to intuitively, clearly, accurately and quantitatively reveal ethane and CO2 reaction routes in CO2-ODHE. The application scope of the proposed calculation method has been investigated and defined;the rationality has been confirmed as well;finally, the rational optimization strategy of Co-SSZ-13 catalyst has been put forward according to the catalytic properties obtained. The experimental data combined with tandem-reaction coupling simplification reaction route analysis method can be extended to other similar complicated reaction systems which is essential to effectively guide the rational design of the highly efficient catalysts for complex reaction systems. © 2023, The Authors. All rights reserved.

关键词： Carbon dioxide

Highly efficient Cu/anatase TiO2 {001}-nanosheets catalysts for methanol synthesis from CO2

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Journal of Energy Chemistry 2018年第2期27卷 381-388页

作者： Yunfeng Bao Chunlei Huang Limin Chen Yu dong Zhang Long Liang Jinjun Wen Mingli Fu Junliang Wu Daiqi Ye National Engineering Laboratory for VOCs Pollution Control Technology and Equipment Guangzhou Higher Education Mega Centre South China University of Technology Guangzhou 510006 Guangdong China Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control School of Environment and Energy Guangzhou Higher Education Mega Centre South China University of Technology Guangzhou 510006 Guangdong China Guangdong Provincial Engineering and Technology Research Center for Environmental Risk Prevention and Emergency Disposal. Guangzhou Higher Education Mega Centre South China University of Technology Guangzhou 510006 Guangdong China

Anatase TiO2 nanosheets（-ns-） with dominant exposed {001} facets were used as support to load copper,and the synthesized Cu/TiO2-ns catalysts were evaluated for CO2 hydrogenation to methanol. Under the reaction conditions, P = 3.0 MPa, T = 260 ℃, V（N2）：V（H2）：V（CO2） = 8：69：23 and gas hourly space velocity（GHSV） = 3600 mL g-1h-1, the methanol yield reached an appealing high value, 5.6%. Copper-loading amount, calcination temperature and reduction atmosphere have been investigated in this work, which significantly influence the particle sizes of copper and/or the defect concentration in TiO2, then leading to different catalytic performance. Characterizations of XRD, EPR, CO2-TPD and FTIR demonstrate that higher specific surface area of Cu is good for the hydrogenation of CO2 and adequate amount of Ti3＋ plays important roles in CO2 activation. Both of them facilitate high turnover frequency（TOF） of methanol formation.

关键词： TiO2 nanoshees Ti3+ Copper Carbon dioxide hydrogenation Methanol synthesis

3D Printed Integrated Gradient-Conductive MXene/CNT/Polyimide Aerogel Frames for Electromagnetic Interference Shielding with Ultra-Low Reflection

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Nano-Micro Letters 2023年第3期15卷 332-345页

作者： Tiantian Xue Yi Yang Dingyi Yu Qamar Wali Zhenyu Wang Xuesong Cao Wei Fan Tianxi Liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua University2999 North Renmin RoadShanghai 201620People’s Republic of China Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi 214122People’s Republic of China Institute of Environmental Processes and Pollution Control School of Environment and Civil EngineeringJiangnan UniversityWuxi 214122People’s Republic of China NUTECH School of Applied Sciences&Humanities National University of TechnologyIslamabad 44000Pakistan

Construction of advanced electromagnetic interference(EMI)shielding materials with miniaturized,programmable structure and low reflection are promising but ***,an integrated transition-metal carbides/carbon nanotube/polyimide(gradient-conductive MXene/CNT/PI,GCMCP)aerogel frame with hierarchical porous structure and gradient-conductivity has been constructed to achieve EMI shielding with ultra-low *** gradient-conductive structures are obtained by continuous 3D printing of MXene/CNT/poly(amic acid)inks with different CNT contents,where the slightly conductive top layer serves as EM absorption layer and the highly conductive bottom layer as reflection *** addition,the hierarchical porous structure could extend the EM dissipation path and dissipate EM by multiple ***,the GCMCP aerogel frames exhibit an excellent average EMI shielding efficiency(68.2 dB)and low reflection(R=0.23).Furthermore,the GCMCP aerogel frames with miniaturized and programmable structures can be used as EMI shielding gaskets and effectively block wireless power transmission,which shows a prosperous application prospect in defense industry and aerospace.

关键词： 3D printing MXene/CNT/Polyimide aerogel Gradient-conductive Electromagnetic interference shielding

Characteristics and interactions of bioaerosol microorganisms from wastewater treatment plants

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Characteristics and interactions of bioaerosol microorganism...

第十六届海峡两岸气溶胶技术研讨会

作者： Yunping Han Tang Yang Guangsu Xu Lin Li Junxin Liu State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences National Engineering Laboratory for VOCs Pollution Control Material & Technology University of Chinese Academy of Sciences School of Resources and Environmental Engineering Ludong University

Bacteria and fungi are abundant and ubiquitous in bioaerosols from wastewater treatment plants（WWTPs）. However, the specificity and interactions of bioaerosol microorganism, particularly of potential pathogens, from WWTPs are still poorly understood. In this study, we investigated 9 full-scale WWTPs in different areas of China for 3 years, and found microbial variations in bioaerosols to be associated with region, season, and process. Relative humidity, total suspended particulates, wind speed, temperature, total organic carbon, NH, Cl and Ca were the major factors influencing this variation, and meteorological factors were more strongly associated with the variation than chemical composition. In total, 95 and 22 potential bacterial and fungal pathogens were detected in bioaerosol, respectively. The linear discriminant analysis effect size method suggested that Serratia, Yersinia, Klebsiella, and Bacillus were discriminative genera in bioaerosols on the whole, and were also hub niches in the interactions within potential bacterial pathogens, based on network analysis. Strong co-occurrences such as Serratia-Bacillus and Staphylococcus-Candida, and co-exclusion such as Rhodotorula-Cladosporium and Pseudomonas-Candida, were found within and between potential bacterial and fungal pathogens in bioaerosols from WWTPs. This study furthers our understanding of the biology and ecology of bioaerosols from WWTPs, and offers a theoretical basis for determining bioaerosol control.

关键词： Wastewater treatment plants Bioaerosols Potential pathogens Discriminative taxa Interactions