文献类型：期刊文献

中文题名：SAPO-34@Silicalite-1核壳结构分子筛的合成及应用

英文题名：Synthesis and application of core-shell zeolite SAPO-34@Silicalite-1

作者：李宗北[1];李建文[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中心化学工程联合国家重点实验室,上海200237

年份：2017

卷号：42

期号：6

起止页码：1

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：北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

基金：国家863计划(2011AA05A204)

语种：中文

中文关键词：SAPO-34;核壳结构;SAPO-34@Silicalite-1;MTO;甲醇;烯烃

外文关键词：SAPO-34; core-shell; SAPO-34@Silicaite-1; MTO; methanol; olefins

摘要：通过晶种二次生长法合成了以SAPO-34沸石为核、Silicalite-1沸石为壳的SAPO-34@Silicalite-1核壳结构分子筛。采用X射线衍射、扫描电子显微镜、NH_3程序升温脱附和N_2低温吸附等对SAPO-34@Silicalite-1进行表征。在固定床反应器中评价了SAPO-34和SAPO-34@Silicalite-1催化剂在甲醇制烯烃(MTO)反应中的催化性能。结果表明,与SAPO-34催化剂相比,以SAPO-34@Silicalite-1核壳结构分子筛为催化剂,催化剂寿命延长,乙烯和乙烯+丙烯选择性增加,丙烯选择性降低。
Core-shell composite SAPO-34@Silicalite-1 with SAPO-34 zeolite as core and Silicalite-1 zeolite as shell was fabricated by the seed secondary growth method. The samples were characterized by XRD, FESEM, NH3-TPD, and N2 adsorption desorption. The catalytic performances of SAPO-34 and SAPO-34@Silicalite-1 zeolite in methanol to olefins （MTO） reaction were evaluated in a fixed-bed reactor. The results showed that compared with SAPO-34, using core-shell zeolite SAPO-34@Silicalite-1 as catalyst, the catalyt life and the selectivities of ethylene and ethylene ＋propylene increased, and the selectivity of propylene decreased.