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石川

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Supervisor of Doctorate Candidates
Supervisor of Master's Candidates


Gender:Female
Alma Mater:大连理工大学
Degree:Doctoral Degree
School/Department:化学学院
Discipline:Physical Chemistry (including Chemical Physics). Chemical Engineering
Business Address:知化楼C201
E-Mail:chuanshi@dlut.edu.cn
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Current position: Home >> Scientific Research >> Paper Publications

Fe-doped Beta zeolite from organotemplate-free synthesis for NH3-SCR of NOx

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Indexed by:期刊论文

Date of Publication:2016-01-01

Journal:CATALYSIS SCIENCE & TECHNOLOGY

Included Journals:SCIE、EI

Volume:6

Issue:17

Page Number:6581-6592

ISSN No.:2044-4753

Abstract:Two types of Beta zeolites, one from organotemplate-free synthesis with a Si/Al ratio of 9 and the other from a commercial one with a Si/Al ratio of 19, were employed here to dope Fe for NH3-SCR of NOx. Fe-Beta (Si/Al = 9) exhibits much higher activity than Fe-Beta (Si/Al = 19), especially at low-temperature regions (<250 degrees C). In addition, it also exhibits better hydrothermal stability as compared with Fe-Beta (Si/Al = 19), which demonstrates that it is a promising SCR catalyst with good activity as well as hydrothermal stability. The correlation between the quantitative calculation of the content of isolated Fe3+ in Beta zeolites and the NO conversion rate at 150 degrees C shows a linear relationship, suggesting that the isolated Fe3+ species affect the SCR activity directly. The higher activity of the Fe-Beta-9 catalyst is supposed to be related not only to the isolated Fe3+ but also to the acidity. Furthermore, the template-free synthesized Beta zeolite shows less dealumination during hydrothermal aging and therefore better hydrothermal stability during the SCR reaction.