期刊
JOURNAL OF CATALYSIS
卷 353, 期 -, 页码 1-10出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2017.06.026
关键词
ZSM-5; Alcohol; Al distribution in framework; Constraint index; Cracking of n-hexane; MTO reaction
资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan (MEXT) [16H04566]
- JST PRESTO Grant, Japan [JPMJPR15S8]
- Grants-in-Aid for Scientific Research [16H04566, 16H06596] Funding Source: KAKEN
The distribution of Al atoms in ZSM-5 has been recognized as an important factor in catalytic activity. Here, ZSM-5 zeolites were synthesized from synthetic gels containing various alcohols, including straight- and branched-chains alcohols. The effect of the alcohols in the synthetic gel on the Al distribution in the MFI framework was investigated based on (27)AI MAS NMR, Co(II) ion UV-vis DRS, and constraint index value. Thus synthesized ZSM-5 zeolites were applied to catalysts for the cracking of n-hexane and the methanol-to-olefins (MTO) reactions in order to investigate the impact of the Al distribution on the catalytic properties. A unique Al distribution in the MFI framework was achieved by the use of trimethylolethane (TME) in combination with Na cations, and thus-prepared ZSM-5 catalyst showed a long catalytic life for both the cracking of n-hexane and the MTO reaction. (C) 2017 Elsevier Inc. All rights reserved.
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