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Cascade electrolysis and thermocatalysis: a reliable system for upgrading C1 to C4 hydrocarbons

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Rare Metals 2024年第1期43卷 410-412页

作者： Chao-Yue Sun Wen Li Hai-Qing Wang Institute for Advanced Interdisciplinary Research(iAIR) College of Chemistry and Chemical EngineeringUniversity of JinanJinan 250022China

The carbon cycle is important for maintaining a stable climate and carbon balance on Earth. Renewable-electricitydriven upcycling of carbon dioxide (CO_(2)) into value-added multi-carbon molecules is a potentially sus... 详细信息

关键词： cycling hydrocarbons enable

Efficient upcycling of high-density polyethylene into separable cyclic hydrocarbons

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Science China Chemistry 2024年第4期67卷 1049-1050页

作者： Shenglu Lu Yanqin Wang State key laboratory of green chemical engineering and industrial catalysis Research Institute of Industrial CatalysisSchool of Chemistry and Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China

This highlight is inspired by a recent article in Nature Nanotechnology in which Zeng and co-workers[1]from the University of Science and Technology of China reported a strategy for upcycling high-density polyethylene(HDPE)into separable cyclic hydrocarbons under solvent-and hydrogen-free *** work made a significant progress in plastic recycling.

关键词： hydrocarbons cycling high

Investigation of the effect of hydrocarbons and monoesters in the gelators’composition on the properties of edible oleogel

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Grain & Oil Science and Technology 2024年第2期7卷 96-104页

作者： Yuliya Frolova Roman Sobolev Varuzhan Sarkisyan Alla Kochetkova Federal Research Centre of Nutrition Biotechnology and Food Safety2/14 Ustyinsky ProyezdMoscow 109240Russia

Natural wax gelators have different compositions of compounds(hydrocarbons,wax esters,free fatty alcohols,and free fatty acids),which results in oleogels with varying *** maintain a consistent composition,the individual components can be added to the original wax *** content of hydrocarbons and wax esters greatly affects the structuring process of liquid edible oils with *** aim of this study was to evaluate the possibility of modifying the properties of beeswax as a gelling agent by adding hydrocarbons or monoesters to obtain oleogels with specific *** tests were conducted to assess the changes in the oleogel properties,such as color,microstructure,oil-binding capacity,thermal and textural *** research results have shown that the addition of the studied fractions has led to a significant change in all properties of *** initial size of oleogel crystals(7.29±1.80μm)changed after adding fractions,varying from 5.28μm to 12.58μm with hydrocarbons and from 9.95μm to 30.41μm with wax *** addition of 30%–50% hydrocarbons decreased the ability of the oleogels to bind oil and made them less firm compared to samples with 10%-20% *** 10%-20% monoesters increased the firmness of the oleogels,but this indicator decreased when their content was increased to 50%.The obtained data indicate that hydrocarbons and wax esters can be used for targeted correction of the gelling properties of beeswax.

关键词： Oleogel Beeswax hydrocarbons Wax monoesters Component composition of gelator Textural properties Food

Designed synthesis of porous carbons for the separation of light hydrocarbons

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Chinese Journal of Chemical Engineering 2022年第2期35卷 130-150页

作者： Shuang Xu Ru-Shuai Liu Meng-Yao Zhang An-Hui Lu State Key Laboratory of Fine Chemicals Liaoning Key Laboratory for Catalytic Conversion of Carbon ResourcesSchool of Chemical EngineeringDalian University of TechnologyDalian 116024China

The separation of light hydrocarbon mixtures(C_(1)–C_(3))generated from petrochemical industry is vital and challenging process for obtaining valuable pure chemical *** comparison to the energy intensive conventional separation technologies(cryogenic distillation,absorption and hydrogenation),the adsorptive separation is considered as a low energy cost and high efficiency *** carbons have been demonstrated as excellent adsorbents for the separation of light hydrocarbons,owing to their designable structure and tailorable *** review summarizes the recent advances of using porous carbons as adsorbents for the separation of light hydrocarbons,including methane/nitrogen,methane/alkane,methane/carbon dioxide,ethylene/ethane and propylene/*** discuss the separation mechanisms and highlight the material features including pore structure,surface chemistry and target molecular properties that determine the separation ***,the challenges and development direction associated with carbonaceous adsorbents for light hydrocarbon separation are discussed,meanwhile the guidelines for the design of porous carbons are proposed.

关键词： Porous carbon Adsorption Separation hydrocarbons

Covalent organic framework shows high isobutene adsorption selectivity from C_(4) hydrocarbons:Mechanism of interpenetration isomerism and pedal motion

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Green Energy & Environment 2022年第2期7卷 296-306页

作者： Wei Chen Mian Li Wen-Li Peng Ling Huang Chao Zhao Dinesh Acharya Wentao Liu Anmin Zheng State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics National Center for Magnetic Resonance in WuhanKey Laboratory of Magnetic Resonance in Biological SystemsWuhan Institute of Physics and MathematicsInnovation Academy for Precision Measurement Science and TechnologyChinese Academy of SciencesWuhan430071China Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityGuangdong515063China Chemistry and Chemical Engineering Guangdong Laboratory Shantou515031China Wuhan National Laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan430074China School of Materials Science and Engineering Zhengzhou UniversityZhengzhouHenan450001China University of Chinese Academy of Sciences Beijing100049China

Adsorption and separation of C_(4) hydrocarbons are crucial steps in petrochemical *** of porous materials for enhancing the separation efficiency have paid much ***-organic frameworks of diamond-topology,dia-COFs,often exhibit unique structural properties such as interpenetration isomerism and pedal ***,in order to get a deep insight into the structure-performance correlation of such dia-COFs,a series of dia-COF materials have been proposed and theoretically investigated on the C_(4) *** is found that these dia-COFs display an excellent adsorption and separation property towards isobutene with respect to other C_(4) hydrocarbons(i.e.,1,3-butadiene,1-butene,2-cis-butene,2-trans-butene,isobutane and n-butane).What’s more,the correlation between the topology parameters and experimental synthesis feasibility has been established for COF-300(dia-cN),and the unreported COF-300(dia-c3) is predicted to be experimentally feasible *** findings not only provide a deep insight into the mechanism of topology characteristics of dia-COFs on C_(4) adsorption and separation properties but also guide the design and synthesis of novel highly-effective porous materials.

关键词： adsorption hydrocarbons separation

Pollution characteristics and health risk assessment of polycyclic aromatic hydrocarbons and nitrated polycyclic aromatic hydrocarbons during heating season in Beijing

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Journal of Environmental Sciences 2023年第1期123卷 169-182页

作者： Xurong Bai Jie Wei Yanqin Ren Rui Gao Fahe Chai Hong Li Fei Xu Yuxue Kong State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Shandong University Environment Research InstituteQingdao 266237China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China

Polycyclic aromatic hydrocarbons(PAHs)and their nitrated derivatives(NPAHs)attract continuous attention due to their outstanding carcinogenicity and *** order to investigate the diurnal variations,sources,formation mechanism,and health risk assessment of them in heating season,particulate matter(PM)were collected in Beijing urban area from December 26,2017 to January 17,*** and NPAHs in PM were quantitatively analyzed via gas chromatography-mass spectrometry(GC-MS).Average daily concentrations of PAHs and NPAHs were(78±54)ng/m^(3)and(783±684)pg/m^(3),*** concentrations of them were significantly higher at nighttime than at daytime,and NPAHs concentrations were 1-2 orders of magnitude lower than PAHs *** the heating season,the dominant species of PAHs include benzo[b]fluoranthene,fluoranthene,pyrene,and chrysene,while 9-nitroanthracene,2+3-nitrofluoranthene,and 2-nitropyrene were dominant species for *** were found to have a single peak during heating and to be primarily distributed in the 0.4-0.7μm particle *** emissions such as biomass burning,coal combustion,and traffic emissions were the major sources of *** were produced by the primary source of vehicle emissions and the secondary reaction triggered by OH radicals,as well as biomass burning during *** to the health risk assessment,the total carcinogenic risk was higher in adults than in *** upon oral ingestion,the carcinogenic risk in children was higher than that of adults,but the risk of adults was higher than children through skin contact and respiratory inhalation.

关键词： Heating season Polycyclic aromatic hydrocarbons Nitrated polycyclic aromatic hydrocarbons Pollution characteristics Source Health risk assessment

’Emulsion locks’ for the containment of hydrocarbons during surfactant flushing

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Journal of Environmental Sciences 2020年第4期32卷 98-109页

作者： Kristine Lamont Alejandro GMarangoni Erica Pensini University of Guelph School of Engineering50 Stone Road EastGwelph ONNIG 2W1Canada University of Guelph Food Science Department50 Stone Road EastGuelph ONNIG 2WlCanada

Reversible double water in oil in water(W/O/W)emulsions were developed to contain subsurface hydrocarbon spills during their remediation using surfactant *** emulsions were prepared by emulsifying CaCl2 solutions in canola oil,and subsequently by emulsifying the W/O emulsions in aqueous sodium alginate *** formation of double emulsions was confirmed with confocal and optical *** double emulsions reversed and gelled when mixed with the surfactants sodium dodecyl sulfate(SDS)and cocamidopropyl betaine(CPB).Gels can act as’emulsion locks’to prevent spreading of the hydrocarbon plume from the areas treated with surfactant flushing,as shown in sand column *** rheology was used to quantify the viscoelastic moduli increase(gelation)upon mixing the double emulsion with SDS and *** was more effective than CPB in gelling the double *** and SDS could adsorb at the interface between water and model hydrocarbons(toluene and motor oil),lowering the interfacial tension and rigidifying the interface(as shown with a Langmuir trough).Bottle tests and optical microscopy showed that SDS and CPB produced W/O and O/W emulsions,with either toluene or motor oil and *** emulsification of motor oil and toluene in water with SDS and CPB facilitated their flow through sand columns and their *** recovery from sand columns was quantitated using Gas-Chromatography MassSpectroscopy(GC-MS).The data show that SDS and CPB can be used both for surfactant flushing and to trigger the gelation of’emulsion locks’.Ethanol also gelled the emulsions at100 mL/L.

关键词： Remediation Emulsion hydrocarbons Surfactant Rheology Langmuir trough

Methane conversion into higher hydrocarbons with dielectric barrier discharge micro-plasma reactor

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Journal of Energy Chemistry 2013年第6期22卷 876-882页

作者： Baowei Wang Wenjuan Yan Wenjie Ge Xiaofei Duan Key Laboratory for Green Chemical Technology of the Ministry of Education School of Chemical Engineering and Technology Tianjin University

We reported a coaxial,micro-dielectric barrier discharge(micro-DBD)reactor and a conventional DBD reactor for the direct conversion of methane into higher hydrocarbons at atmospheric *** effects of input power,residence time,discharge gap and external electrode length were investigated for methane conversion and product *** found the conversion of methane in a micro-DBD reactor was higher than that in a conventional DBD *** at an input power of 25.0 W,the conversion of methane and the total C2+C3 selectivity reached 25.10% and 80.27%,respectively,with a micro-DBD reactor of 0.4 mm discharge ***,a nonlinear multiple regression model was used to study the correlations between both methane conversion and product selectivity and various system *** calculated data were obtained using SPSS 12.0 *** regression analysis illustrated the correlations between system variables and both methane conversion and product selectivity.

关键词： dielectric barrier discharge hydrocarbons methane micro-reactor plasma

Transmembrane transport of polycyclic aromatic hydrocarbons by bacteria and functional regulation of membrane proteins

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Frontiers of Environmental Science & Engineering 2020年第1期14卷 1-21页

作者： Hongqi Wang Ruhan Jiang Dekang Kong Zili Liu Xiaoxiong Wu Jie Xu Yi Li College of Water Sciences Beijing Normal UniversityBeijing 100875China Key Laboratory of Ecology of Rare and Endangered Species and Environmental Protection(Ministry of Education) Guangxi Normal UniversityGuilin 541004China College of Environment and Resource Guangxi Normal UniversityGuilin 541004China

In recent years,increasing research has been conducted on transmembrane transport processes and the mechanisms behind the microbial breakdown of polycyclic aromatic hydrocarbons(PAHs),including the role of membrane proteins in transmembrane transport and the mode of *** article explains the adsorption,uptake and transmembrane transport of PAHs by bacteria,the regulation of membrane protein function during the transmembrane *** are three different regulation mechanisms for uptake,depending on the state and size of the oil droplets relative to the size of the microbial cells,which are(i)direct adhesion,(ii)emulsification and pseudosolubilization,and(iii)interfacial ***,two main transmembrane transport modes are introduced,which are(i)active transport and(ii)passive uptake and active efflux ***,introduce the proteomics and single cell analysis technology used to address these areas of research,such as Isobaric tags for relative and absolute quantitation(iTRAQ)technology and Nano Secondary ion mass spectrometry(Nano-SIMS).Additionally,analyze the changes in morphology and structure and the characteristics of microbial cell membranes in the process of transmembrane ***,recognize the microscopic mechanism of PAHs biodegradation in terms of cell and membrane proteins are of great theoretical and practical significance for understanding the factors that influence the efficient degradation of PAHs contaminants in soil and for remediating the PAHs contamination in this area with biotechnology.

关键词： Polycyclic aromatic hydrocarbons Transmembrane transport Adsorption and uptake of hydrocarbons Proteomics Functional regulation of membrane protein Single cell analysis technology