燃料化学学报（中英文）2025，Vol.53Issue(4)：515-526,12.DOI:10.1016/S1872-5813(24)60488-3
不同模板剂合成SAPO-35分子筛及其甲醇制烯烃催化性能
Synthesis of SAPO-35 molecular sieves with different structure-directing agents and their catalytic performance in the conversion of methanol to olefins
摘要
Abstract
A series of SAPO-35 molecular sieves with different SiO2/Al2O3 ratios were synthesized by hydrothermal method using hexamethylene imine(HMI)and N-methylpiperidine(NMP)as the structure-directing agent(SDA).The synthesized SAPO-35 molecular sieves were characterized by XRD,SEM,FT-IR,NH3-TPD,XRF and N2 sorption and their catalytic performance in the conversion of methanol to olefins(MTO)was comparatively investigated.The results indicated that the crystallinity and acid density of the SAPO-35 molecular sieves increase first and then decrease with the increase of the SiO2/Al2O3 ratio in the initial gel;in particular,the SAPO-35-0.3(HMI)sample with a SiO2/Al2O3 ratio of 0.3 displays a high crystallinity,large surface area and suitable acid distribution as a catalyst in MTO.Compared with the SAPO-35-HMI sample synthesized with HMI as SDA,the SAPO-35-NMP sample having the same SiO2/Al2O3 ratio but synthesized using new NMP as SDA exhibits much better catalytic stability and higher selectivity to light olefins in MTO;the selectivity to ethene+propene reaches 81.3%,where ethene accounts for more than 50%,far surpassing propene.关键词
SAPO-35分子筛/模板剂/六亚甲基亚胺/N-甲基哌啶/甲醇制烯烃Key words
SAPO-35 molecular sieve/structure-directing agent/hexamethylene imine/N-methylpiperidine/methanol to olefin分类
化学工程引用本文复制引用
梁妮,康蕾,王钰佳,王海彦,白英芝,韩乔,孙娜..不同模板剂合成SAPO-35分子筛及其甲醇制烯烃催化性能[J].燃料化学学报（中英文）,2025,53(4):515-526,12.基金项目
The project was supported by Liaoning Province Department of Education(LJKQZ20222284,JYTMS20231433,JYTMS20231449),Science and Technology Program of Liaoning Province(2022-BS-290),Talent Scientific Research Fund of LSHU(2021XJJL-019)and Talent Scientific Research Fund of LSHU(2021XJJL-020).辽宁省教育厅基本科研基金(LJKQZ20222284,JYTMS20231433,JYTMS20231449),辽宁省科学技术计划(2022-BS-290),辽宁石油化工大学引进人才科研启动基金(2021XJJL-019)和辽宁石油化工大学引进人才科研启动基金(2021XJJL-020)资助 （LJKQZ20222284,JYTMS20231433,JYTMS20231449）
