|
OALib Journal期刊
ISSN: 2333-9721
费用：99美元
|
|
|
|
稀土改性hzsm-5催化乙醇脱水制乙烯
, PP. 32-36
Keywords: hzsm-5,稀土,乙醇脱水,乙烯
Abstract:
采用浸渍法制备la、ce、sm、eu等稀土（re）金属改性的hzsm-5分子筛催化剂（re/hzsm-5），考察它们在乙醇脱水制乙烯反应中的催化性能.通过x射线衍射（xrd）、n2吸附－脱附（bet）和氨程序升温脱附（nh3-tpd）等手段对其物化性能进行表征，并讨论反应温度对la/hzsm-5催化性能的影响.结果表明：少量稀土引入不破坏hzsm-5分子筛的骨架结构，只对表面酸性产生了较大的影响；表面酸量决定re/hzsm-5催化乙醇脱水制乙烯的性能，酸量的增大有利于乙醇转化率的提高；在不同稀土改性的催化剂中，2%la/hzsm-5的催化性能最佳，在反应温度240℃、55%原料乙醇、进料质量空速（whsv）2.5h-1的条件下，乙醇转化率和乙烯选择性分别达到99.3%和98.6%.
| [1] | 龚林军,韩超,谭天伟.乙醇制备乙烯的研究[j].现代化工,2006,26(4):44-47.gonglinjun,hanchao,tantianwei.researchonpreparationofbioethylene[j].modernchemicalindustry,2006,26(4):44-47.[2]takaharai,saitom,inabam,etal.dehydrationofethanolintoethyleneoversolidacidcatalysts[j].catalysisletters,2005,105(3/4):249-252.[3]顾志华.乙醇制乙烯技术现状及展望[j].化工进展,2006,25(8):847-851.guzhihua.developmentandperspectiveofethylenefromethanol[j].chemicalindustryandengineeringprogress,2006,25(8):847-851.[4]黄英明,李恒,黄鑫江,等.生物乙烯研究进展[j].生物加工过程,2008,6(1):1-6.huangyingming,liheng,huangxinjiang,etal.advancesofbioethylene[j].chinesejournalofbioprocessengineering,2008,6(1):1-6.[5]levanmaor,levesquep,mclaughling,etal.ethylenefromethanoloverzeolitecatalysts[j].appliedcatalysis,1987,34(1/2):163-179.[6]胡耀池,黄和,施海峰,等.过渡金属改性hzsm5催化乙醇脱水制乙烯[j].化学与生物工程,2007,24(2):19-21.huyaochi,huanghe,shihaifeng,etal.catalyticdehydrationofethanoltoethyleneusingtransitionmetalmodifiedhzsm5[j].chemistryandbioengineering,2007,24(2):19-21.[7]黄鑫江,胡耀池,李恒,等.碱土金属改性hzsm5催化乙醇脱水制乙烯的反应研究[j].化学试剂,2007,29(12):705-707.huangxinjiang,huyaochi,liheng,etal.studyondehydrationofethanoltoethylenecatalyzedbyalkalineearthmetalmodifiedhzsm5[j].chemicalreagents,2007,29(12):705-707.[8]zhangdongsheng,wangrijie,yangxiaoxia.effectofpcontentonthecatalyticperformanceofpmodifiedhzsm5catalystsindehydrationofethanoltoethylene[j].catalysisletters,2008,124(3/4):384-391.[9]任丽萍,赵国良,滕加伟,等.la修饰zsm5分子筛催化剂用于c4烯烃催化裂解制丙烯[j].工业催化,2007,15(3):30-34.renliping,zhaoguoliang,tengjiawei,etal.zsm5catalystsmodifiedwithlanthanumforcatalyticcrackingofc4olefinstopropylene[j].industrialcatalysis,2007,15(3):30-34.[10]wangxiaoning,zhaozhen,xuchunming,etal.effectsoflightrareearthonacidityandcatalyticperformanceofhzsm5zeoliteforcatalyticcrackingofbutanetolightolefins[j].journalofrareearths,2007,25(3):321-328.[11]罗立文,李俊玲,李虎,等.在la改性hzsm5分子筛上甲醇对噻吩转化反应规律的影响[j].分子催化,2006,20(1):11-16.luoliwen,lijunling,lihu,etal.studyontheeffectofmethanolonthetransformationreactionofthiopheneoverhzsm5zeolite[j].journalofmolecularcatalysis,2006,20(1):11-16.[12]jacobsjm,jacobspa,uytterhoevenjb,etal.processforobtainingethylenefromethanol:us,4670620[p].1987-06-02.[13]高滋,何鸣元,戴逸云.沸石催化与分离技术[m].北京:中国石化出版社,1999.
|
Full-Text
|
|
Contact Us
service@oalib.com QQ:3279437679 
WhatsApp +8615387084133
|
|
