TY - JOUR
T1 - Kinetics and mechanism of catalytic oxidation of NO in coal combustion flue gas over co-doped Mn-Ti oxide catalyst
AU - Rahman, S. M.Ashiqur
AU - Tahmasebi, Arash
AU - Moghtaderi, Behdad
AU - Yu, Jianglong
N1 - Funding Information:
This study was supported by the Australian Research Council Linkage grant (LP160100540) and the National Natural Science Foundation of China (21676132 and 21476100).
Publisher Copyright:
Copyright © 2020 American Chemical Society.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/4/16
Y1 - 2020/4/16
N2 - The coprecipitation method was used to prepare Mn/Ti, Mn/Co/Ti, and Co/Ti metal oxide catalysts to oxidize NO with O2. The influence of the concentrations of NO and O2 on the oxidation of NO was investigated. Besides, the changes in the reaction rate with the particle size of the catalysts were investigated to determine the internal diffusion resistance. The surface area and microcrystalline structure of the catalysts were analyzed to investigate the impact of physical structure on SO2 poisoning in the catalyst. It was observed that Co doping in Mn/TiO2 had a favorable impact on reducing the effect of SO2 poisoning during the NO oxidation reaction. On the basis of the kinetic study, it was concluded that the reaction followed the Langmuir-Hinshelwood (L-H) mechanism, where NO and O2 were adsorbed on the catalyst, forming highly reactive NO+ and O-, which were then converted into NO2. The Co doping into the TiO2 crystal lattice increased the O2 adsorption, thus accelerating the rate of NO oxidation reaction.
AB - The coprecipitation method was used to prepare Mn/Ti, Mn/Co/Ti, and Co/Ti metal oxide catalysts to oxidize NO with O2. The influence of the concentrations of NO and O2 on the oxidation of NO was investigated. Besides, the changes in the reaction rate with the particle size of the catalysts were investigated to determine the internal diffusion resistance. The surface area and microcrystalline structure of the catalysts were analyzed to investigate the impact of physical structure on SO2 poisoning in the catalyst. It was observed that Co doping in Mn/TiO2 had a favorable impact on reducing the effect of SO2 poisoning during the NO oxidation reaction. On the basis of the kinetic study, it was concluded that the reaction followed the Langmuir-Hinshelwood (L-H) mechanism, where NO and O2 were adsorbed on the catalyst, forming highly reactive NO+ and O-, which were then converted into NO2. The Co doping into the TiO2 crystal lattice increased the O2 adsorption, thus accelerating the rate of NO oxidation reaction.
UR - http://www.scopus.com/inward/record.url?scp=85086843614&partnerID=8YFLogxK
U2 - 10.1021/acs.energyfuels.0c00122
DO - 10.1021/acs.energyfuels.0c00122
M3 - Article
AN - SCOPUS:85086843614
SN - 0887-0624
VL - 34
SP - 6052
EP - 6058
JO - Energy & Fuels
JF - Energy & Fuels
IS - 5
ER -