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Effect of the addition of Ce to MnO x /Ti catalyst on reduction of N 2 O in low‐temperature SCR
Author(s) -
Shang Tong,
Hui Shien,
Niu Yanqing,
Liang Ling,
Liu Changchun,
Wang Denghui
Publication year - 2014
Publication title -
asia‐pacific journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.348
H-Index - 35
eISSN - 1932-2143
pISSN - 1932-2135
DOI - 10.1002/apj.1826
Subject(s) - catalysis , selective catalytic reduction , chemistry , oxygen , doping , inorganic chemistry , nuclear chemistry , redox , materials science , organic chemistry , optoelectronics
The effect of MnO x /Ti catalyst doped with Ce prepared by sol–gel method at a low temperature on N 2 O formation during the selective catalytic reduction of NO with NH 3 was studied in detail. Results showed that the production of N 2 O was primarily controlled by two paths: (1) direct reaction of NO and NH 3 and (2) oxidation of NH 3 with O 2 . The overoxidation of NH 3 was the dominant step in N 2 O reduction. Addition of Ce to MnO x /Ti catalyst increased the proportion of lattice oxygen on the catalyst surface. Meanwhile, the stability of lattice oxygen, which contributed to the decrease in N 2 O formation by inhibiting the overoxidation of NH 3 , on the catalyst surface was the best when the Ce/Ti mole ratio reached 0.1. © 2014 Curtin University of Technology and John Wiley & Sons, Ltd.