文献类型：期刊文献

中文题名：混合模板剂合成高硅铝比纳米HZSM-5分子筛及其MTP反应性能

英文题名：Synthesis of nano-sized HZSM-5 zeolites with high SiO_2/Al_2O_3 ratio by mixed templates and their performance in MTP reaction

作者：陈玉柱[1];李建文[1];马宏方[1];钱炜鑫[1];张海涛[1];应卫勇[1]

机构：[1]华东理工大学化工学院大型工业反应器工程教育部工程研究中心化学工程联合国家重点实验室,上海200237

年份：2019

卷号：44

期号：1

起止页码：6

中文期刊名：天然气化工—C1化学与化工

外文期刊名：Natural Gas Chemical Industry

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD_E2019_2020】；

基金：中央高校基础研究基金(No.222201817013)

语种：中文

中文关键词：混合模板剂;高硅铝比;纳米HZSM-5分子筛;MTP;丙烯

外文关键词：mixed template;high SiO2/Al2O3 ratio;nanocrystal HZSM-5;MTP;propylene

摘要：以四丙基氢氧化铵与乙二胺作为混合模板剂,采用水热合成法制备高硅铝比纳米HZSM-5分子筛,对分子筛进行了XRD、FE-SEM、N_2低温吸附、NH_3-TPD等表征,考察了分子筛在MTP反应中的催化性能。结果表明,适量引入乙二胺作为模板剂可以调节分子筛晶粒尺寸、酸强度及酸量。当四丙基氢氧化铵与乙二胺等摩尔混合时,粒径为180nm,酸强度减弱,酸量减少,此时分子筛表现出最优催化性能,丙烯选择性达到45.72%。
Tetrapropylammonium hydroxide(TPAOH)and ethylenediamine(EDA)were mixed as template to hydrothermally synthesize nano-sized HZSM-5 zeolites with high SiO2/Al2O3 molar ratios.The samples were characterized by XRD,FE-SEM,N2 adsorption,and NH3-TPD.The catalytic performance of the nano-sized HZSM-5 zeolites in MTP reaction was evaluated in a fixed-bed reactor.The results showed that the zeolite sample grain size and acid strength and amount can be adjusted by the introduction of EDA.Mixing TPAOH and EDA equimolarly,the prepared zeolite had a grain size of 180nm with decreasing acid strength and amount,and exhibited the optimal catalytic performance with the highest propylene selectivity of 45.72%.