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Liquid discharge plasma for fast biomass liquefaction at mild conditions: The effects of homogeneous catalysts

Frontiers of Chemical Science and Engineering 2020年第5期14卷 763-771页

作者： Sen Wang Shiyun Liu Danhua Mei Rusen Zhou Congcong Jiang Xianhui Zhang Zhi Fang Kostya(Ken)Ostrikov College of Electrical Engineering and Control Science Nanjing Tech UniversityNanjing 211816China Fujian Provincial Key Laboratory of Plasma and Magnetic Resonance Institute of Electromagnetics and AcousticsDepartment of Electronic ScienceCollege of Electronic Science and TechnologyXiamen UniversityXiamen 361005China School of Chemistry Physics and Mechanical EngineeringQueensland University of TechnologyBrisbaneQueensland 4000Australia

Non-thermal plasma exhibits unique advan-tages in biomass conversion for the sustainable production of higher-value energy *** homogeneous catalysts are usually required for plasma-enabled biomass liquefaction to achieve time-and energy-efficient ***,the effects of such catalysts on the plasma-assisted liquefaction process and of the plasma on those catalysts have not been thoroughly *** this study,an electrical discharge plasma is employed to promote the direct liquefaction of sawdust in a mixture of polyethylene glycol 200 and *** commonly used chemicals,sulfuric acid,nitric acid and sodium p-toluene sulfate,were selected as *** effects of the type of catalyst and concentration on the liquefaction yield were examined;further,the roles of the catalysts in the plasma liquefaction process have been *** results showed that the liquefaction yield attains a value of 90%within 5 min when 1%sulfuric acid was employed as the *** with the other catalysts,sulfuric acid presents the highest efficiency for the liquefaction of *** was observed that hydrogen ions from the catalyst were primarily responsible for the significant thermal effects on the liquefaction system and the generation of large quantities of active species;these effects directly con-tributed to a higher efficacy of the plasma-enabled liquefaction process.

关键词： discharge plasma biomass liquefaction cata-lyst homogeneous catalysts

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Catalytic alkane dehydrogenations

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Science Bulletin 2015年第15期60卷 1316-1331页

作者： Yuxuan Zhang Wubing Yao Huaquan Fang Aiguo Hu Zheng Huang Shanghai Key Laboratory of Advanced Polymeric Materials School of Materials Science and Engineering East China University of Science and Technology State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic Chemistry Chinese Academy of Sciences

Olefins find widespread applications in the synthesis of polyolefins and fine chemicals. With an increasing demand for olefins, the technologies for alkane dehydrogenation have drawn much attention. Several types of heterogeneous catalysts have found applications in industry for the dehydrogenation of light alkanes, mainly ethane, propane, and butane. In the past three decades, a number of transition-metal complexes,particularly pincer-ligated iridium complexes, have been developed as the homogeneous catalysts for alkane dehydrogenations. The homogeneous catalyst systems operate under much milder conditions compared with the heterogeneous systems, and some systems exhibit good activity and high regioselectivity in dehydrogenation of alkanes longer than butane.

关键词： Olefins Alkane dehydrogenation Heterogeneous catalysts homogeneous catalysts Pincer ligand Iridium complexes

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NONBRIDGED HALF-TITANOCENES CONTAINING ANIONIC ANCILLARY DONOR LIGANDS:PROMISING NEW catalysts FOR PRECISE SYNTHESIS OF CYCLIC OLEFIN COPOLYMERS(COCs)

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Chinese Journal of Polymer Science 2008年第5期26卷 513-523页

作者： Kotohiro Nomura Graduate School of Materials Science Nara Institute of Science and Technology(NAIST)Japan

Precise,efficient copolymerizations of ethylene with cyclic olefins[norbornene(NBE),cyclopentene(CPE)]using nonbridged half-titanocenes of type,Cp TiCl_2(L)(Cp =cyclopentadienyl group,L=aryloxo,ketimide)-MAO catalyst systems have been ***_2(N=C Bu_2)exhibited both remarkable catalytic activity and efficient NBE incorporation for ethylene/NBE copolymerization:the NBE incorporation by Cp TiCl_2(X)(X=N=C Bu_2,O-2,6- Pr_2C_6H_3; Cp =Cp,C_5Me_5,indenyl)was related to the calculated coordination ene...

关键词： Titanium Cyclic olefin copolymers Copolymerization Ethylene homogeneous catalysts

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