PEG⁃800对SAPO⁃34形貌和催化性能的影响

Effect of PEG⁃800 on Morphology and Catalytic Performance of SAPO⁃34

谢萱 白英芝 邰伟卫 王钰佳 王海彦

Xuan Xie Yingzhi Bai Weiwei Tai Yujia Wang Haiyan Wang

辽宁石油化工大学 石油化工学院，辽宁 抚顺 113001 中国石油大学（华东） 化学化工学院，山东 青岛 266580

School of Petrochemical Engineering，Liaoning Petrochemical University，Fushun Liaoning 113001，China College of Chemistry and Chemical Engineering，China University of Petroleum，Qingdao Shandong 266580，China

模板剂是合成分子筛必不可少的组成部分，对分子筛的物理性质和催化性能有很大的影响。以不锈钢管为晶化器，采用水热法合成SAPO?34分子筛，考察了PEG?800对分子筛结晶度、形貌和酸性的影响，并对其MTO催化性能进行测评。结果表明，以四乙基氢氧化铵（TEAOH）和PEG?800为复合模板剂所合成的分子筛样品呈薄板状，结晶度和酸性适宜，且催化寿命最长可达340 min；当甲醇转化率大于95%时，双烯选择性可达84.0%，同时发现板层状分子筛的晶体厚度越薄催化性能越好。

Template agent is an essential part in the synthesis of molecular sieves, which has great influence on the physical properties and catalytic properties of molecular sieves. SAPO?34 molecular sieve was synthesized by hydrothermal method using stainless steel tube as crystallization vessel. The effect of PEG?800 addition on crystallinity, morphology and acidity of molecular sieve was investigated, and its MTO catalytic performance was evaluated. The results show that the molecular sieve samples synthesized with TEAOH & PEG?800 as the composite template agent are thin plate?like, the crystallinity and acidity are suitable, and the longest catalytic life is 340 min. When the methanol conversion is above 95%, the selectivity of diolefins is up to 84.0%. It is also found that the thinner the crystal thickness of the lamellar molecular sieve, the better the catalytic performance.

辽宁省教育厅科研项目(L2017LQN008)

10.3969/j.issn.1672-6952.2022.04.001