典型文献
Elucidating the effect of barium halide promoters on La2O3/CaO catalyst for oxidative coupling of methane
文献摘要：
The industrialization of oxidative coupling of methane(OCM)is restricted by the low once through yield of C2 hydrocarbons.Recently,the halogen-assisted OCM process has been attempted to overcome this issue,but the reaction stability was poor due to the rapid loss of gas-phase halides or molten alkali halides.In this work,the barium salts,particularly barium halides(BaCl2 and BaF2),were demonstrated to be efficient promoters to improve the OCM reactivity of La2O3/CaO catalyst by increasing both C2 selec-tivity and C2H4/C2H6 ratio,and simultaneously achieving outstanding reaction stability.The promoting mechanism can be understood in two aspects.On the one hand,the introduction of barium salts increased the amount of surface electrophilic oxygen species,serving as the alkaline active sites for selec-tive methane activation.On the other hand,the barium halide additives induced the in-situ formation of methyl halide intermediates facilitating C2H6 dehydrogenation,and their intimate contact with catalyst substrate restricted the rapid halogen loss and thereby improved the catalytic stability.This work not only provides a class of efficient OCM catalyst,but also offers a highly stable halogen-assisted reaction strategy.
文献关键词：
中图分类号：
作者姓名：
Yue Wang;Xiao Yang;Fumin Yin;Kai Zhang;Hongfei Guo;Guowei Wang;Guiyuan Jiang;Chunyi Li;Xiaolin Zhu
作者机构：
State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Qingdao 266580,Shandong,China;State Key Laboratory of Heavy Oil Processing,China University of Petroleum,Beijing 102249,China
文献出处：
引用格式：
[1]Yue Wang;Xiao Yang;Fumin Yin;Kai Zhang;Hongfei Guo;Guowei Wang;Guiyuan Jiang;Chunyi Li;Xiaolin Zhu-.Elucidating the effect of barium halide promoters on La2O3/CaO catalyst for oxidative coupling of methane)[J].能源化学,2022(10):49-59
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B类：
Elucidating,effect,barium,promoters,La2O3,CaO,catalyst,oxidative,coupling,methane,industrialization,OCM,restricted,low,once,through,yield,hydrocarbons,Recently,halogen,assisted,process,been,attempted,overcome,this,issue,but,reaction,stability,was,poor,due,rapid,loss,gas,phase,halides,molten,In,work,salts,particularly,BaCl2,BaF2,were,demonstrated,efficient,reactivity,increasing,both,selec,C2H4,C2H6,ratio,simultaneously,achieving,outstanding,promoting,mechanism,can,understood,two,aspects,On,one,hand,introduction,increased,amount,surface,electrophilic,oxygen,species,serving,alkaline,active,sites,activation,other,additives,induced,situ,formation,methyl,intermediates,facilitating,dehydrogenation,their,intimate,contact,substrate,thereby,improved,catalytic,This,not,only,provides,class,also,offers,highly,stable,strategy
AB值：
0.571337
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