Deactivation mechanism of arsenic and resistance effect of SO42∿/sup> on commercial catalysts for selective catalytic reduction of NOx with NH3
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- 作者：Wenshuo Hu ; Xiang Gao ; xgao1@zju.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Yawen Deng ; Ruiyang Qu ; Chenghang Zheng ; Xinbo Zhu ; Kefa Cen
- 关键词：SCR catalysts ; Arsenic ; Deactivation ; Acidity ; Oxidizability
- 刊名：Chemical Engineering Journal
- 出版年：2016
- 出版时间：1 June 2016
- 年：2016
- 卷：293
- 期：Complete
- 页码：118-128
- 全文大小：2954 K
文摘
- •
Arsenic decreases Lewis and Brønsted acid sites.
- •
V
OH is destroyed and less reactive AsOH is formed.- •
Arsenic arouses strong NSCR and NH3 oxidation above 300 °C.
- •
SO42− supply reactive acid sites and thus show superior arsenic resistance.
- •
Provide a promising anti-As poisoning formula for commercial SCR catalysts.