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Promotional effect of acidic oxide on catalytic activity and N 2 selectivity over CeO 2 for selective catalytic reduction of NO x by NH 3
Author(s) -
Song Zhongxian,
Liu Pan,
Fu Yongmei,
Liu Hongpan,
Huang Zhenzhen,
Kang Haiyan,
Mao Yanli,
Liu Biao,
Guo Yifei
Publication year - 2019
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.4919
Subject(s) - chemistry , catalysis , selectivity , lewis acids and bases , selective catalytic reduction , inorganic chemistry , oxide , hydrothermal circulation , nuclear chemistry , chemical engineering , organic chemistry , engineering
The CeO 2 , CeO 2 ‐ZrO 2 and CeO 2 ‐WO 3 catalysts were prepared by hydrothermal method and used to the selective catalytic reduction of NO x by NH 3 . The addition of ZrO 2 or WO 3 into CeO 2 was favorable for pore structure, and then improved the number of active sites. Besides, the introduction of ZrO 2 into CeO 2 could improve the Lewis acid sites while WO 3 could contribute to the generation of Brønsted and Lewis acid sites, which could improve the catalytic performance and N 2 selectivity. The CeO 2 ‐WO 3 catalyst exhibited optimal catalytic activity with above 90% NO x conversion performance at 220–425 °C and approximately 100% N 2 selectivity at 150–425 °C.