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发布时间：2019-03-09

论文类型：期刊论文

发表时间：2013-10-01

发表刊物：CHEMICAL ENGINEERING JOURNAL

收录刊物：Scopus、EI、SCIE

卷号：232

页面范围：266-272

ISSN号：1385-8947

关键字：Oscillation; H-2-SCR; FTIR; Platinum; Y zeolite

摘要：Oscillatory behavior of the selective catalytic reduction of NOx by hydrogen (H-2-SCR) was studied over Pt/HY catalyst. It was found that the oscillation frequency increases with the increase of catalyst amount, reaction temperature and the H-2 concentration in the feed gas within the range of tested experimental conditions. The NOx-TPD indicates that the adsorption-desorption of NOx on Pt particles is involved in the oscillation. It is proposed that the primary surface species on the Pt particle is alternatively changed between Pt-NOx and Pt-H, and the oscillatory behavior of the H-2-SCR is a statistic result of oscillations on many Pt particles. The in situ FTIR and NH3 pulse injection studies reveal that NH3 is involved in the synchronous oscillation. (C) 2013 Elsevier B.V. All rights reserved.