Pore plugging effects on the performance of ZSM-5 catalyst in MTP reaction using a discrete model

• 作者: Yudong Shen Hao Liang Zuwei Liao Binbo Jiang Jingdai Wang Yongrong Yang Minggang Li Yibin Luo Xingtian Shu
• 来源期刊: 中国化学工程学报（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Process Systems Engineering and Process Safety
• 页码范围: 253-263
• 页数: 11页
• 语种: 英文

摘要

Coke is an important medium for connecting reaction and regeneration of the methanol to propylene pro-cess on the ZSM-5 catalyst. Coke grows in the meso and macro pores, it gradually worsens the diffusion inside the catalyst particle. Furthermore, pore plugging is inevitable which causes the deactivation of ZSM-5 catalyst. However, current continuum model cannot reflect the changes in pore structure with clear physical concepts. A discrete model that is verified by the carbon deposition experiments is intro-duced to indicate the behavior of pore plugging effects. Results show that the pore plugging has a signif-icant effect on the performance of the catalyst. The time varying profile of effectiveness factor is obtained, indicating a regular reduction with the increase of the pore plugging effect. Spatial distributions of pore size that would significantly enhance the plugging effect are also identified.