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Properties of BaAl 2 O 4 in the Simultaneous Removal of Soot and NO x
Author(s) -
Li Y.J.,
Lin H.,
Shangguan W.F.,
Huang Z.
Publication year - 2007
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.200700193
Subject(s) - soot , nox , combustion , catalysis , chemistry , nitrate , autoignition temperature , fourier transform infrared spectroscopy , diffuse reflectance infrared fourier transform , analytical chemistry (journal) , reaction rate , inorganic chemistry , chemical engineering , organic chemistry , photocatalysis , engineering
The catalytic activity of BaAl 2 O 4 in the simultaneous removal of soot and NO x was evaluated by Temperature Programmed Reaction (TPR). It was found that BaAl 2 O 4 could effectively catalyze the reaction of soot with NO x under various reaction conditions. Compared with non‐catalytic combustion, ignition temperature, T ig , and maximum combustion temperature, T m , of soot decreased by more than 175 °C and 240 °C, respectively. Tight contact of soot with BaAl 2 O 4 , higher O 2 content and a lower flow rate of synthesized gases were beneficial to the catalytic reaction. It was confirmed by Diffuse Reflectance Infrared Fourier Transform Spectroscopy (DRIFTS) analysis, that the reaction of soot with NO 2(ad) was the most important factor in simultaneous removal of soot and NO x , in which NO 2(ad) existed on BaAl 2 O 4 in the form of monodentate nitrate, bridged nitrate and ionic nitrate.