期刊
JOURNAL OF CATALYSIS
卷 312, 期 -, 页码 46-57出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2014.01.009
关键词
Hierarchical zeolites; Beta; Desilication; Acidity; TIPB; n-Decane; Cracking; FCC
资金
- National Science Centre, Poland [2011/01/B/ST5/00915]
- European Regional Development Fund in the framework of the Polish Innovation Economy Operational Program [POIG.02.01.00-12-023/08]
- Spanish Ministry of Economy and Competitiveness through the Severo Ochoa program [SEV-2012-0267]
- Consolider Ingenio Multicat [CSD-2009-00050, MAT-2012-3856-0O2-01]
The zeolite Beta is considered as a promising additive for FCC catalyst in diesel oil production. In this article, it is shown that hierarchical zeolite Beta obtained by an optimized desilication procedure increases diesel and propylene yields during gas-oil cracking reaction. The alkaline treatment of zeolite Beta (Si/ Al = 22) by desilication with NaOH and NaOH&TBAOH was investigated. The catalytic performance improvement of desilicated zeolite Beta has been rationalized by deep characterization of the samples including X-ray diffraction, low-temperature adsorption of nitrogen, solid-state Si-29 MAS NMR and IR studies of acidity. Finally, the catalytic performance of the zeolites Beta was evaluated in the cracking of n-decane, 1,3,5-tri-iso-propylbenzene, and vacuum gas oil. It was found that desilication with NaOH&TBACH ensures the more uniform intracrystalline mesoporosity with the formation of narrower mesopores, while preserving full crystallinity resulting in catalysts with the most appropriated acidity and then with better catalytic performance. (c) 2014 Elsevier Inc. All rights reserved.
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