期刊
CATALYSIS TODAY
卷 375, 期 -, 页码 94-100出版社
ELSEVIER
DOI: 10.1016/j.cattod.2019.12.010
关键词
Conversion; DMECHA-Br; Ethylene-to-propylene; SSZ-13; Y-zeolite
资金
- R&D Convergence Program of MSIP (Ministry of Science, ICT and Future Planning)
- NST (National Research Council of Science & Technology) of Republic of Korea [CRC-14-1-KRICT]
- National Research Council of Science & Technology (NST), Republic of Korea [CRC-14-1-KRICT] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study successfully synthesized SSZ-13 with a relatively wide silica/alumina ratio using a relatively inexpensive template, and showed excellent performance in the ethylene-to-propylene reaction, demonstrating potential applications in this field.
SSZ-13 zeolite (CHA structure) with small pore or 8-membered ring has been widely studied in catalysis and adsorption. Even SSZ-13 might be very useful in such applications, the synthesis usually relies on expensive organic templates. In this study, SSZ-13 was obtained, with a relatively inexpensive template, N,N,N-dimethylethylcyclohexylammonium bromide, from conversion of Y zeolites with wide silica/alumina ratios (SARs), especially in the absence of any crystal seed, additional silica and alumina. The obtained SSZ-13 s have relatively wide SAR of 6.9-36.7; and phase-pure SSZ-13 s could also be obtained from mixture of Y zeolites. The obtained SSZ-13 s, in proton form, were applied in ethylene-to-propylene (ETP) reaction, and the SSZ-13 with suitable SAR (18.8) had not only high propylene yield but also stable propylene production compared with other SSZ-13 s, showing the possible application of the SSZ-13 in ETP reaction.
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