典型文献
Enhancing the side-chain alkylation of toluene with methanol to styrene over the Cs-modified X zeolite by the assistance of basic picoline as a co-catalyst
文献摘要：
Side-chain alkylation of toluene with methanol is a green pathway to realize the one-step production of styrene under mild conditions,but the low selectivity of styrene is difficult to be improved with by-products of ethylbenzene and xylene.In this study,a new way is introduced to improve the catalytic performance by means of assisting basic compounds as co-catalysts during the toluene side-chain alkylation with methanol to styrene.As a result,high activity of side-chain alkylation appears over the basic Cs-modified zeolite catalysts prepared by ion exchange and impregnation methods.This high performance should be mainly attributed to two co-catalysis actions:(1)the promotion of basic compounds for methanol dehydrogenation to formaldehyde as the intermediate for side-chain alkylation;(2)the suppression of the styrene transfer hydroge-nation on basic Cs-modified zeolites to avoid the formation of ethylbenzene.Especially for Cs2O/CsX-ex catalyst,the addition of 2％mol/mol 2-picoline in reaction mixture could achieve both 12.3％toluene conversion and 84.1％styrene selectivity.Whereas the higher concentration of 2-picoline(＞6％mol/mol)caused an inhibition to the catalytic activity because the excessive basic compound poisoned the combined acid-base pathway required for the side-chain alkylation process.In addition,two possible side-chain alkylation reaction routes on Cs-modified zeolite under the different 2-picoline absorption were described.
文献关键词：
中图分类号：
作者姓名：
Zhe Hong;Guoqing Zhao;Fangtao Huang;Xiaoxia Wang;Zhirong Zhu
作者机构：
School of Chemical Science and Engineering,Tongji University,Shanghai,200092,China
文献出处：
引用格式：
[1]Zhe Hong;Guoqing Zhao;Fangtao Huang;Xiaoxia Wang;Zhirong Zhu-.Enhancing the side-chain alkylation of toluene with methanol to styrene over the Cs-modified X zeolite by the assistance of basic picoline as a co-catalyst)[J].绿色能源与环境（英文）,2022(06):1241-1252
A类：
picoline,hydroge,Cs2O,CsX
B类：
Enhancing,side,chain,alkylation,toluene,methanol,styrene,over,modified,by,assistance,basic,Side,green,pathway,realize,step,production,under,mild,conditions,low,selectivity,difficult,improved,products,ethylbenzene,xylene,In,this,study,new,introduced,catalytic,performance,means,assisting,compounds,catalysts,during,result,activity,appears,prepared,exchange,impregnation,methods,This,should,mainly,attributed,two,catalysis,actions,promotion,dehydrogenation,formaldehyde,intermediate,suppression,transfer,zeolites,avoid,formation,Especially,addition,reaction,mixture,could,achieve,both,conversion,Whereas,higher,concentration,caused,inhibition,because,excessive,poisoned,combined,acid,base,required,process,possible,routes,different,absorption,were,described
AB值：
0.415963
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