Organosilane surfactant-assisted synthesis of mesoporous SSZ-39 zeolite with enhanced catalytic performance in the methanol-to-olefins reaction |
| |
Authors: | Hao Xu Chi Lei Qinming Wu Qiuyan Zhu Xiangju Meng Daniel Dai Stefan Maurer rei-Nicolae Parvulescu Ulrich M ller Fengshou Xiao |
| |
Affiliation: | 1. Key Laboratory of Applied Chemistry of Zhejiang Province, Department of Chemistry, Zhejiang University, Hangzhou 310028, China2. BASF Catalysts (Shanghai) Co., Ltd., Shanghai 201206, China3. BASF SE, Ludwigshafen 67056, Germany |
| |
Abstract: | SSZ-39 zeolite with AEI framework structure is a good catalyst candidate for the methanol-to-olefins (MTO) reaction. However, the diffusion limitation and coke formation often results in fast deactivation of the SSZ-39 zeolite catalyst. One solution for this challenge is to introduce mesoporosity in the SSZ-39 zeolite. Herein, we report the synthesis of mesoporous SSZ-39 zeolite using an organosilane surfactant, N,N-dimethyl-N-(3-(trimethoxysilyl)propyl)octan-1-aminium chloride, as a mesopore template and N,N-dimethyl-cis-2,6-dimethylpiperidinium as a micropore template. The obtained zeolites were characterized by X-ray diffraction, N2 sorption, scanning electron microscopy, temperature programmed desorption of ammonia, and magic angle spinning nuclear magnetic resonance of 27Al. The results show that the mesoporous SSZ-39 zeolite has high crystallinity, meso/microporosity, high surface area, cuboid morphology, and abundant acidic sites. More importantly, this mesoporous SSZ-39 zeolite exhibits enhanced catalyst lifetime in the MTO reaction due to the presence of mesoporosity for fast mass transfer, compared with a conventional SSZ-39 zeolite without mesoporosity. |
| |
Keywords: | SSZ-39 zeolite mesopores organosilane surfactant MTO reaction soft template mass transfer |
|
| 点击此处可从《Frontiers of Chemical Science and Engineering》浏览原始摘要信息 |
|
点击此处可从《Frontiers of Chemical Science and Engineering》下载全文 |
|