期刊
ACS CATALYSIS
卷 6, 期 4, 页码 2163-2177出版社
AMER CHEMICAL SOC
DOI: 10.1021/acscatal.5b02480
关键词
zeolite; SSZ-13; porosity; deactivation; carbonaceous deposits; methanol-to-olefins
资金
- Technology Foundation (STW) of The Netherlands Organization for Scientific Research (NWO)
- China Scholarship Council
- NWO-CW (VENI grant)
- NWO-CW (TOP research grant)
Chabazite zeolites with trimodal porosity (native micropores of the CHA framework, an additional network of larger micropores of similar to 0.5 nm, and mesopores) were synthesized by adding diquarternary ammonium type surfactant C22-4-4 cations and fluoride anions in the synthesis of SSZ-13 zeolite. The hierarchical SSZ-13 zeolites are fully crystalline and exhibit similar acidity as bulk SSZ-13 zeolite. The increased diffusion rate in the hierarchical SSZ-13, proven by uptake experiments of bulky molecules and selective staining by thiophene oligomers, resulted in much slower catalyst deactivation in the methanol-to-olefins (MTO) reaction. Confocal fluorescent images of spent hierarchical SSZ-13 zeolites reveal homogeneous distribution of carbonaceous deposits, indicating that the micropore space has been completely utilized during the MTO reaction.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据