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Revalorization of CO2 for methanol production via ZnO promoted carbon nanofibers based Cu-ZrO2 catalytic hydrogenation

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Journal of Energy Chemistry 2019年第12期28卷 68-76页

作者： Israf Ud Din maizatul s.shaharun A.Naeem s Tasleem Pervaiz Ahmad Department of Chemistry College of Science and HumaniriesPrince Sarttam bin Abdulaziz UniversityAl-kharjSaudi Arabia Department of Fundamental and Applied sciences Universiti Teknologi PETRONASMalaysia National Centre of Excellence in Physical Chemistry University of PeshawarPakistan Chemistry Department Kohat University of Science and TechnologyKohatPakistan Department of Physics University of Azad Jammu&Kashmir13100 MuzaffarabadPakistan

A series of novel carbon nanofibers(CNFs)based Cu-ZrO2 catalysts were synthesized by deposition precipitation *** investigate the influence of promoter,catalysts were loaded with 1,2,3 and 4 wt%ZnO and characterized by ICP-OEs,HRTEM,BET,N2O chemisorption,TPR,XPs and CO2-TPD *** results revealed that physicochemical properties of the catalysts were strongly influenced by incorporation of ZnO to the parent *** surface area(sCu)and dispersion(DCu)were slightly decreased by incorporation of ZnO ***,sCuand DCuwere remarkably decreased when ZnO content was exceeded beyond 3 wt%.The catalytic performance was evaluated by using autoclave slurry reactor at a pressure and temperature of 30 bar and 180℃,*** promotion of CuZrO2/CNFs catalyst with 3 wt%of ZnO enhanced methanol synthesis rate from 32 to 45 g kg^-1 h^-***,with the ZnO promotion the selectivity to methanol was enhanced to 92%compared to 78%of the un-promoted Cu-ZrO2/CNFs catalyst at the expense of a lowered CO2 *** addition,the catalytic activity of this novel catalyst system for CO2 hydrogenation to methanol was compared with the recent literature data.

关键词： Methanol synthesis slurry reactor Promoter effect Chemisorption studies CNFs CO2 conversion

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基于离子液的超声辅助萃取小蓼叶中的精油及真实溶剂似导体屏蔽模型研究

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色谱 2017年第6期35卷 656-664页

作者： Habib ULLAH Cecilia D WILFRED maizatul s.shaharun Center of Research in Ionic Liquids Universiti Teknologi PETRONAs Fundamental and Applied science Department Universiti Teknologi PETRONAS

Ionic liquids ( ILs) based ultrasonic-assisted extract has been applied for the extraction of essential oil from Persicaria minor leaves. The effects of temperature,sonication time,and particle size of the plant material on the yield of essential oil were investigated. Among the different ILs employed,1-ethyl-3-methyli midazolium acetate was the most effective,providing a 9. 55% yield of the essential oil under optimum conditions( 70 ℃,25 min,IL ∶hexane ratio of 7 ∶10 ( v /v) ,particle size 60-80 mesh) . The performance of 1-ethyl-3-methylimidazolium acetate in the extraction was attributed to its lowviscosity and ability to disintegrate the structural matrix of the plant material. The ability of 1-ethyl-3-methylimidazolium acetate was also confirmed using the conductor like-screening model for realistic solvents. This research proves that ILs can be used to extract essential oils from lignocellulosic biomass.

关键词： gas chromatography mass spectrometry(GC-Ms) ionic liquid(IL) ultrasonication optimization Persicaria minor essential oil

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