快速合成Cu-SAPO-34分子筛及其甲醇制烯烃催化性能
Rapid synthesis of Cu-SAPO-34 zeolite and MTO catalytic performance
张强 1周洲 2李建祥 1田梦阳 1于梦云3
作者信息
- 1. 中国石油大学(华东)重质油国家重点实验室,山东青岛 266580
- 2. 巩义市泛锐熠辉复合材料有限公司,河南巩义 451200
- 3. 江苏洋井石化集团有限公司,江苏连云港 222000
- 折叠
摘要
通过引入含铜分子筛晶种作为铜源、10 h快速合成出Cu-SAPO-34 分子筛,并与传统的水热合成法和铜胺络合物引入铜源的方式进行对比,同时利用XRD、SEM、IR、TPD和微反等手段表征样品的结构和甲醇制烯烃(MTO)催化性能.结果表明:与常规合成方法相比,快速合成法可在 10 h制备出结晶度在 86.24%,固体收率达到 94.65%的Cu-SAPO-34 分子筛,其乙烯+丙烯选择之和达到 81.26%;与添加铜胺络合物相比,加入含铜分子筛晶种的方式引入铜元素,更合适于快速合成法,避免了铜无法与分子筛骨架结合的问题;通过调整含铜分子筛晶种的性质及加入量,可以快速合成晶粒直径在 470 nm的纳米Cu-SAPO-34 分子筛,固体收率达到 96.72%,乙烯+丙烯选择之和达到86.24%.
Abstract
Cu-SAPO-34 molecular sieves were rapidly synthesized with introduced copper zeolite seed as copper source for 10 h,which were compared with the traditional hydrothermal synthesis method and copper amine complex introduced copper source.Meanwhile,the structure and methanel to olefin(MTO)catalytic performance of the sample were characterized by XRD,SEM,IR,TPD and micro reaction.The results show that the Cu-SAPO-34 molecular sieve with a crystallinity of 86.24%and solid yield of 94.65%could be prepared by rapid synthesis method in 10 h,and the sum of ethylene and pro-pylene selectivity reaches 81.26%.Compared with the addition of copper amine complex,the introduction of copper by adding copper seed is more suitable for rapid synthesis and avoids the problem that copper cannot combine with molecular sieve framework.Nanosized Cu-SAPO-34 molecular sieves with grain diameter of 470 nm could be rapidly synthesized by ad-justing the properties and adding amount of Cu-SAPO-34 seed,in which the solid yield is 96.72%,and the ethylene and propylene selectivity is 86.24%.
关键词
甲醇制烯烃/Cu-SAPO-34/分子筛/快速合成/含铜分子筛晶种Key words
methanel to olefin/Cu-SAPO-34 molecular sieve/rapid synthesis/copper zeolite seed引用本文复制引用
基金项目
山东省重点研发计划重大科技创新工程项目(2021ZLGX06)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据