石油化工2024，Vol.53Issue(2)：167-174,8.DOI:10.3969/j.issn.1000-8144.2024.02.004
超重力过程强化技术制备片状MFI分子筛及其催化性能
Preparation of sheet-like MFI zeolite by high-gravity process intensification technology and its catalytic performance
摘要
Abstract
A sheet-like MFI zeolite was synthesized using high-gravity process intensification technology and applied in olefin catalytic cracking(OCC)reaction.The effects of high gravity process parameters,such as feed-in method,cycle time,crystallization time and crystallization temperature,on the synthesis of sheet-like MFI zeolite were studied.The experimental results show that the uniformity of the sample particles can be effectively improved by adopting an equal proportion feed-in method and increasing the cycle time of the mixed liquid in the high gravity reactor.As the crystallization time increases,the high gravity process intensification technology can significantly accelerate the growth and crystallization of zeolite and reduce its particle size.High gravity can promote the rapid and uniform mixing of reactants before crystallization and enable the nucleation and crystallization processes to take place in a uniform environment,thus affecting the rearrangement of silicon and aluminum sources and the crystallization process,resulting in controllable grain size,narrow particle size distribution,and high crystallinity of nanoparticles.The sheet-like MFI zeolite prepared by high-gravity process intensification presents smaller particle size,stronger infrared characteristic peak,and higher acid content.It exhibits high conversion and stability in OCC reaction,and excellent catalytic performance.关键词
MFI分子筛/片状分子筛/过程强化/超重力/烯烃催化裂解Key words
MFI zeolite/sheet-like zeolite/process intensification/high-gravity/olefin catalytic cracking分类
化学化工引用本文复制引用
何万仁,陈昌海,史静,滕加伟..超重力过程强化技术制备片状MFI分子筛及其催化性能[J].石油化工,2024,53(2):167-174,8.基金项目
国家自然科学基金项目(U22B6011) （U22B6011）
国家重点研发计划项目(2023YFA1507701). （2023YFA1507701）
