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Effect of KCl on the selective catalytic reduction of NO with NH 3 over vanadia‐based catalysts for biomass combustion
Author(s) -
Jiang Ye,
Gao Xiang,
Zhang Yongxin,
Wu Weihong,
Luo Zhongyang,
Cen Kefa
Publication year - 2014
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.11795
Subject(s) - catalysis , x ray photoelectron spectroscopy , molar ratio , sintering , chemistry , selective catalytic reduction , valence (chemistry) , fourier transform infrared spectroscopy , inorganic chemistry , chemical state , combustion , nuclear chemistry , chemical engineering , organic chemistry , engineering
Effect of KCl on vanadia‐based catalysts for selective catalytic reduction of NO with NH 3 was investigated by means of BET and pore size distribution measurements, XRD, XPS, FTIR, and NO reduction measurements. The catalytic activity was found to decrease rapidly with increasing the amount of KCl addition at different reaction temperatures. When the molar ratio of K/V exceeded 2.0, most of the activity was lost. The presence of KCl caused the sintering of the catalysts as well as the decrease in the amount of V atoms and the change of V valence state at the catalyst surface. Based on the analysis of physical and chemical properties of the catalysts, the KCl‐poisoning mechanism model of the vanadia‐based SCR catalysts was proposed. © 2013 American Institute of Chemical Engineers Environ Prog, 33: 390–395, 2014
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