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	改性H-ZSM-34上氯甲烷催化转化制低碳烯烃(英文); Catalytic conversion of methyl chloride to lower olefins over modified H-ZSM-34
	徐霆 ; 宋航 ; 邓卫平 ; 张庆红 ; 王野
	2013-11-20
关键词	氯甲烷 低碳烯烃 H-ZSM-34 乙二胺四乙酸二钠处理 铈修饰 酸性 Methyl chloride Lower olefins H-ZSM-34 Ethylenediaminetetraacetate treatment Cerium modification Acidity
英文摘要	比较了几种典型的沸石分子筛在氯甲烷转化制乙烯、丙烯和丁烯等低碳烯烃反应中的催化性能,发现H-zSM-34具有较佳的催化活性和选择性.经乙二胺四乙酸二钠(nA2H2EdTA)水溶液处理,并经离子交换及焙烧后,H-zSM-34上氯甲烷转化制低碳烯烃的催化性能显著改善.当nA2H2EdTA浓度为0.1 MOl/l,反应温度为673 k,CH3Cl分压9.2 kPA时,C2–C4烯烃选择性和收率分别达82%和61%.研究还发现,CE修饰H-zSM-34催化剂同样可改善氯甲烷制低碳烯烃的选择性和收率.表征结果表明,nA2H2EdTA处理和CE修饰均降低了H-zSM-34的酸性.酸性的降低可抑制低碳烯烃的氢转移反应,继而避免了其进一步转化为低碳烷烃.; Among several typical zeolites,H-ZSM-34 was found to be an efficient catalyst for the conversion of methyl chloride to lower olefins,i.e.,ethylene,propylene,and butenes.Treatment of H-ZSM-34 with a Na2 H2 EDTA(EDTA = ethylenediaminetetraacetate) aqueous solution followed by ion exchange and calcination enhanced the catalytic performance significantly.The selectivity to lower olefins increased significantly for certain Na2 H2 EDTA aqueous solution concentrations;when the H-ZSM-34 catalyst was treated with a 0.1 mol/L Na2 H2 EDTA solution,the selectivity and yield of C2 –C4 olefins reached 82% and 61%,respectively,at 673 K and a CH3 Cl partial pressure of 9.2 kPa.The modifica- tion of H-ZSM-34 with Ce ions improved C2 –C4 olefin selectivity and yield.Catalyst characterization suggests that treatment with Na2 H2 EDTA or modification by Ce decreases the acidity of H-ZSM-34.The weakened acidity of the treated or modified H-ZSM-34 may suppress the hydrogen transfer reaction and prevent lower olefins from further transformation to paraffins.; supportedbytheNationalBasicResearchProgramofChina(2010CB732303); theNationalNaturalScienceFoundationofChina(21173174;20923004;21033006;and21161130522); theProgramforChangjiangScholarsandInnovativeResearchTeaminUniversity(IRT1036)~~
语种	zh_CN
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/106791]
专题	化学化工－已发表论文
推荐引用方式 GB/T 7714	徐霆,宋航,邓卫平,等. 改性H-ZSM-34上氯甲烷催化转化制低碳烯烃(英文), Catalytic conversion of methyl chloride to lower olefins over modified H-ZSM-34[J],2013.
APA	徐霆,宋航,邓卫平,张庆红,&王野.(2013).改性H-ZSM-34上氯甲烷催化转化制低碳烯烃(英文)..
MLA	徐霆,et al."改性H-ZSM-34上氯甲烷催化转化制低碳烯烃(英文)".(2013).

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