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Preface to Special Issue on Advances in Ceria Catalysis

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Chinese Journal of Catalysis 2020年第6期41卷 899-900页

作者： Feng Wang Zili Wu Lab of Bioenergy chemical Dalian Institute of chemical Physics CASChina chemical Science Division and Center for Nanophase Materials Sciences Oak Ridge National Laboratory USA

Ceria,which acts as a“star”among the metal-oxides,has established to be one of the most promising materials for chemical transformations and energy applications owing to its redox and acid–base *** has beco.e a key co.ponent in three-way catalytic co.verters,water-gas shift reaction,co.oxidation,methane co.bustion,and co.plex organic *** importantly,introducing of other metals to ceria,tailoring the shape of the ceria,and reducing structure size of ceria,usually decrease the formation energy of oxygen vacancy(V?)and lead to unique catalytic performances.

关键词：催化研究二氧化铈

Gas–Liquid Mass Transfer Characteristics in a Gas–Liquid–Solid Bubble co.umn under Elevated Pressure and Temperature

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Chinese Journal of chemical Engineering 2014年第9期22卷 955-961页

作者：靳海波杨索和何广湘刘德林佟泽民朱建华 Department of chemical Engineering Beijing Institute of Petrochemical Technology Faculty of chemical Science and Engineering China University of Petroleum

abstract The volumetric mass transfer co.fficient kLa of gases （H2, co. co.） and mass transfer co.fficient kL on liquid par-affin side were studied using the dynamic absorption method in slurry bubble co.umn reactors under elevated temperature and elevated pressure. Meanwhile, gas-holdup and gas-liquid interfacial area a were obtained. The effects of temperature, pressure, superficial gas velocity and solid co.centration on the mass transfer co.ffi-cient were discussed. Experimental results show that the gas-liquid volumetric mass transfer co.fficient kLa and interfacial area a increased with the increase of pressure, temperature, and superficial gas velocity, and decreased with the slurry co.centration. The mass transfer co.fficient kL increased with increasing superficial gas velocity and temperature and decreased with higher slurry co.centration, while it changed slightly with pressure. Ac-co.ding to analysis of experimental data, an empirical co.relation is obtained to calculate the values of kLa for H2 （co. co.） in the gas-paraffin-quartz system in a bubble co.umn under elevated temperature and elevated pressure.

关键词： Mass transfer characteristicBubble co.umnElevated pressureElevated temperature

A Novel Sulfided Mo/C Catalyst for Direct Vapor Phase Carbonylation of Methanol at Atmospheric Pressure

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Journal of Natural Gas Chemistry 2003年第1期12卷 31-36页

作者： Feng PengDepartment of chemical Engineering, South China University of Technology, Guangzhou 510640, China Department of chemical Engineering South China University of Technology Guangzhou 510640 China

The direct carbonylation of methanol, without any halide in the feed as apromoter, is presented. A series of Mo catalysts supported on activated carbon, γ-Al_2O_3 and SiO_2were prepared. The results show that the support greatly affects the Mo catalyst in the directvapor-phase carbonylation of methanol, and activated carbon is the best supports of the investigatedsupports. In addition, the relationships between adsorptions of NH_3 and co.and carbonylation ofmethanol were investigated. A novel sulfided Mo/C catalyst had high activity and selectivity for thevapor phase carbonylation of methanol to methyl acetate without the addition of a CH_3I promoter tothe feed. The reaction co.ditions were optimized at a reaction temperature of 573 K, a methanolco.centration of 23 mol% and a carbon monoxide space velocity of 3,000 L/(kg·h). Under theseoptimal co.ditions a methanol co.version of 50%, carbonylation selectivity of 80 rnol%, andspace-time yield of 8.0 mol/(kg·h) were obtained. The active phase of this novel sulfided Mo/Ccatalyst is the non-crystalline phase, and the active co.ponent is present as MoS_(2.5) on thesurface of the activated carbon.

关键词： methanol carbonylation sulfided catalyst molybdenum catalystsupport activated carbon heterogeneous catalysis

Ethanol shock enhances the reco.ery of anthocyanin from lowbush blueberry

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Chinese Journal of chemical Engineering 2020年第12期28卷 3096-3102页

作者： Nueraili Maimaiti Niyazi Aili M.Kamran Khan Zhigang Tang Guoqiang Jiang Zheng Liu Key Laboratory of Industrial Biocatalysis Ministry of EducationBeijing 100084China Department of chemical Engineering Tsinghua UniversityBeijing 100084China

Deactivation of polyphenol oxidase(PPO)in natural products is essential for downstream processing of functional molecules used as food or food additives,particularly those served as *** the present work,we identified two proteins with PPO activity from lowbush blueberry using ammonium sulphate precipitation and chromatography *** of these proteins was studied using aqueous solutions of ethanol of different *** PPO activity was reco.ered after ethanol removal for the protein samples previously soaked in a lowco.centration ethanol solution.A co.plete and unreco.erable deactivation of the proteins was achieved using ethanol with co.centration over 70%(v/v),as manifested by the significant changes in circular dichroism(CD)and fluorescence spectrosco.y *** on these findings,we propose a new extraction process for blueberry anthocyanin,in which an ethanol shock,*** blueberry fruit in a 70%(v/v)ethanol solution for 1 h,is implemented before subsequent *** new process increases the anthocyanin yield by 55%in co.parison to that without the ethanol shock.

关键词： Anthocyanin Lowbush blueberry Ethanol shock Polyphenol oxidase Bioseparation Enzyme deactivation

co.parative studies on promotional effect of Pr_(6)O_(11),Nd_(2)O_(3)and Sm_(2)O_(3)on Ni-SiO_(2) for pressurized carbon dioxide reforming of methane

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Journal of Rare Earths 2023年第6期41卷 830-838,I0002页

作者： Bin Li Ting Li Yong-Shan Xiao Zhong-Wen Liu Key Laboratory of Syngas co.version of Shaanxi Province School of Chemistry&Chemical EngineeringShaanxi Normal UniversityXi'an 710119China

The 7 wt%rare earth metal oxide promoted Ni-SiO_(2) catalysts of Ni-7Pr_(6)O_(11)-SiO_(2),Ni-7Nd_(2)O_(3)-SiO_(2),and Ni-7Sm_(2)O_(3)-SiO_(2) were prepared by the co.plex-deco.position method,and were co.paratively evaluated for pressurized carbon dioxide reforming of methane(CRM)under severe co.ditions of 750℃,1.0 MPa,CH_(4)/co.(2)=1,and gas hourly space velocity of 53200 mL/(g·h).The addition of rare earth metal oxide does not affect the Ni dispersion,and all of the catalysts show similarly high Ni dispersion of16.0%±0.2%.As a result,all of the catalysts are highly active for pressurized CRM,the initial CH_(4) co.versions of which approach the thermodynamic equilibrium(47.0%±0.2%).In co.trast,a clearly favorable effect of the added rare earth metal oxide on the stability of Ni-SiO_(2)was revealed from the CRM results for a time-on-stream of 50 h,and the highest stability without an observable decrease in the co.versions of CH_(4)and co.(2)was obtained over Ni-7Sm_(2)O_(3)-SiO_(2).Based on the characterization results of thermogravimetric differential scanning calorimetry(TG-DSC)and transmission electron microsco.y(TEM),the improved stability of Ni-7Pr_(6)O_(11)-SiO_(2),Ni-7Nd_(2)O_(3)-SiO_(2),and Ni-7Sm_(2)O_(3)-SiO_(2)for pressurized CRM was manifested mainly as the suppressed formation of carbon nanotubes over the catalyst surface,the extent of which is dependent on the specific rare earth metal ***,the co.secutive temperature programmed surface reaction of CH_(4),co.(2),and O_(2)over Ni-7Sm_(2)O_(3)-SiO_(2)vigorously reveals that the addition of Sm_(2)O_(3)into Ni-SiO_(2)inhibits the CH_(4)deco.position but enhances the oxidization of the carbon species by co.(2),leading to the well-balanced rates for forming and removing the co.e over Ni-7Sm_(2)O_(3)-SiO_(2).These findings are not only beneficial to deeply understanding the promotional effect of rare earth metal oxides on Ni-based catalysts for CRM,but also important for extending the application of

关键词： Carbon dioxide Methane Pressurized reforming Rare earth metal oxide Nickel

High-throughput co.putational screening and design of nanoporous materials for methane storage and carbon dioxide capture

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Green Energy & Environment 2018年第2期3卷 107-119页

作者： Minman Tong Youshi Lan Qingyuan Yang Chongli Zhong School of Chemistry and Materials Science Jiangsu Normal University Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology State Key Laboratory of Organic-Inorganic co.posites Beijing University of Chemical Technology

The globally increasing co.centrations of greenhouse gases in atmosphere after co.bustion of co.l-or petroleum-based fuels give rise to tremendous interest in searching for porous materials to efficiently capture carbon dioxide(co.2) and store methane(CH4), where the latter is a kind of clean energy source with abundant reserves and lower co.2 emission. Hundreds of thousands of porous materials can be enrolled on the candidate list, but how to quickly identify the really promising ones, or even evolve materials(namely, rational design high-performing candidates) based on the large database of present porous materials? In this co.text, high-throughput co.putational techniques, which have emerged in the past few years as powerful tools, make the targets of fast evaluation of adsorbents and evolving materials for co.2 capture and CH_4 storage feasible. This review provides an overview of the recent co.putational efforts on such related topics and discusses the further development in this field.

关键词： High-throughput co.putation Screening and design Nanoporous materials co. capture CH4 storage

1,n-Thiosulfonylation using thiosulfonates as dual functional reagents

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Chinese chemical Letters 2022年第11期33卷 4732-4739页

作者： Danhua Ge Jia-Wei Chen Pei Xu Jinyin Pan Xue-Qiang Chu Institute of Advanced Synthesis School of Chemistry and Molecular EngineeringNanjing Tech UniversityNanjing 211816China Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy School of PharmacyXuzhou Medical UniversityXuzhou 221004China Sartorius Stedim(Shanghai)Trading co. Ltd.Shanghai 200000China

In recent years,the direct introduction of sulfonyl and sulfenyl groups into unsaturated substrates by using thiosulfonates as unique dual functional reagents has inarguably provided chemists a new platform for the diverse synthesis of important S-co.taining *** 1,n-thiosulfonylation reactions usually feature simple procedures,100%atom eco.omy,and high *** review focuses on the recent advancements in the transformations of thiosulfonates through 1,n-thiosulfonylation involving the formation of two distinct C-S bonds under transition-metal-catalyzed or metal-free co.ditions,where thiosulfonates act as both a sulfonyl and a sulfenyl co.ponent.

关键词： Thiosulfonylation Thiosulfonates Dual functional reagents Difunctionalization Atomic eco.omy

Capture of carbon dioxide over porous solid adsorbents lithium silicate, lithium aluminate and magnesium aluminate at pre-co.bustion temperatures

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Frontiers of chemical Science and Engineering 2011年第2期5卷 215-226页

作者： P.V.Korake A.G.Gaikwad CE&PD Division National Chemical LaboratoryPune 411008India

The capturing process for carbon dioxide over porous solid adsorbents such as lithium silicate,lithium aluminate,and magnesium aluminate at pre-co.bustion temperatures was *** silicate was prepared by the sol gel and solid fusion *** lithium silicate adsorbent was characterized by X-ray diffraction(XRD),X-ray photoelectron spectrosco.y(XPS),scanning elec-tron microsco.y(SEM),nuclear magnetic resonance(NMR),and surface *** capturing of carbon dioxide over lithium silicate,lithium aluminate,and magnesium aluminate was explored at different experimental co.di-tions such as exposure time,temperature variation,and exposure carbon dioxide *** capturing process for carbon dioxide was investigated over these adsorbents with variation of their metal mole *** effect of the addition of(promoter)sodium,potassium,and cesium in the lithium silicate adsorbent was explored to investigate the variation of the capture of carbon dioxide over these adsorbents.

关键词： capturing co.(2) lithium silicate lithium alu-minate magnesium aluminate

Cu/ACF adsorbent modified by non-thermal plasma for simultaneous adsorption–oxidation of H_(2)S and PH_(3)

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Journal of Environmental Sciences 2023年第5期127卷 641-651页

作者： Xinyu Yang Kai Li Chi Wang Fei Wang Xin Sun Yixing Ma Yuan Li Lei Shi Ping Ning Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyKunming 650500China National-Regional Engineering Center for Reco.ery of Waste Gases from Metallurgical and chemical Industries Kunming University of Science and TechnologyKunming 650500China Faculty of chemical Engineering Kunming University of Science and TechnologyKunming 650500China

Non-thermal plasma(NTP)surface modification technology is a new method to co.trol the surface properties of materials,which has been widely used in the field of environmental protection because of its short action time,simple process and no *** this study,Cu/ACF(activated carbon fiber loaded with co.per)adsorbent was modified with NTP to remove H_(2)S and PH_(3) simultaneously under low temperature and micro-oxygen ***,the effects of different modified atmosphere(air,N_(2) and NH_(3)),specific energy input(0–13 J/mL)and modification time(0–30 min)on the removal of H_(2)S and PH_(3) were *** test results indicated that under the same reaction co.ditions,the adsorbent modified by NH_(3) plasma with 5 J/mL for 10 min had the best removal effect on H_(2)S and PH_(3).co.(2) temperature-programmed desorption and X-ray photoelectron spectrosco.y(XPS)analyzes showed that NH_(3) plasma modification co.ld introduce amino functional groups on the surface of the adsorbent,and increase the types and number of alkaline sites on the ***-Emmett-Teller and scanning electron microsco.y showed that NH_(3) plasma modification did not significantly change the pore size structure of the adsorbent,but more active co.ponents were evenly exposed to the surface,thus improving the adsorption *** addition,X-ray diffraction and XPS analysis indicated that the co.sumption of active co.ponents(Cu and Cu_(2)O)and the accumulation of sulfate and phosphate on the surface and inner pores of the adsorbent are the main reasons for the deactivation of the adsorbent.

关键词： Non-thermal plasma(NTP) Surface modification Simultaneous adsorption-oxidation Cu/ACF(activated carbon fiber loaded with co.per) H_(2)S PH_(3)