期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 203, 期 -, 页码 163-169出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2014.10.037
关键词
Silver; BEA zeolite; Hydrogen effect; SCR of NO
类别
资金
- program of National Academy of Sciences of Ukraine Fundamental problems of nanostructure systems, nanomaterials, nanotechnologies [0111U008240]
Physicochemical properties of AgAlBEA and AgSiBEA zeolites were investigated by IR spectroscopy with pyridine, H-2-TPR, XPS and diffuse reflectance UV-vis spectroscopy. Their catalytic properties were studied in the process of selective reduction of NO with ethanol and in the presence of hydrogen in reaction mixture. AgAlBEA catalysts show wider temperature range of NO-to-N-2 conversion in the process of SCR with ethanol than AgSiBEA. Promoting H-2-effect on the SCR of NO with ethanol is observed in the presence of AgAlBEA catalysts, whereas it is almost absent for AgSiBEA. A key factor for better performance of AgAlBEA than AgSiBEA is the presence of silver nanoclusters in close proximity of strong Lewis acidic sites. (C) 2014 Elsevier Inc. All rights reserved.
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