期刊
CATALYSIS COMMUNICATIONS
卷 27, 期 -, 页码 114-118出版社
ELSEVIER
DOI: 10.1016/j.catcom.2012.06.013
关键词
Thermal catalytic cracking; Modified HZSM-5; Light olefin; Stability
资金
- Chemical Engineering Center of Excellence at Tarbiat Modares University
To investigate the effect of Si/Al ratio, Fe and P loadings on the stability of HZSM-5 in the catalytic cracking of naphtha, experimental tests were done over 20 h time on stream on modified HZSM-5 with different Si/Al molar ratios. NH3-TPD and TPO analyses showed that the more number of weak acid sites, the greater amount of coke is formed. According to TPO and XRD results, it was demonstrated that dealumination had a significant role in catalytic stability. Among catalysts, Fe(6)-P(2)/HZSM-5(25) showed the highest catalytic stability (1.86 wt.% propylene reduction). (C) 2012 Elsevier B.V. All rights reserved.
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