TY - JOUR
T1 - Component synergistic catalysis of Ce-Sn-W-Ba-Ox/TiO2 in selective catalytic reduction of NO with ammonia
AU - Jin, Qijie
AU - Chen, Mengmeng
AU - Tao, Xingjun
AU - Lu, Bingxu
AU - Shen, Jianyu
AU - Shen, Yuesong
AU - Zeng, Yanwei
N1 - Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2020/5/15
Y1 - 2020/5/15
N2 - The component synergistic catalysis of the Ce-Sn-W-Ba-Ox/TiO2 in selective catalytic reduction of NO (in the presence/absence of H2O and SO2) was investigated. Results verified that CeO2 was an essential primary active component, and WO3, SnO2 and BaO were essential cocatalyst. TiO2 provided enough acid sites, CeO2 enhanced redox properties, weakened acid strength and increased chemisorbed oxygen concentration, which was beneficial to accelerate the activation and desorption of NH3. SnO2 increased chemisorbed oxygen concentration, enhanced redox properties and improved activation rate of NH3. WO3 increased acid amount and BaO enhanced the anti-influences to water vapor and SO2. Their synergistic effects made Ce-Sn-W-Ba-Ox/TiO2 exhibit excellent catalytic performance for NH3-SCR, reaching the highest value about 100% at 350 °C in presence of H2O and SO2. Moreover, in situ DRIFTS study showed that the reaction followed L-H mechanism at high temperature and tended to simultaneously follow E-R and L-H mechanisms at low temperature.
AB - The component synergistic catalysis of the Ce-Sn-W-Ba-Ox/TiO2 in selective catalytic reduction of NO (in the presence/absence of H2O and SO2) was investigated. Results verified that CeO2 was an essential primary active component, and WO3, SnO2 and BaO were essential cocatalyst. TiO2 provided enough acid sites, CeO2 enhanced redox properties, weakened acid strength and increased chemisorbed oxygen concentration, which was beneficial to accelerate the activation and desorption of NH3. SnO2 increased chemisorbed oxygen concentration, enhanced redox properties and improved activation rate of NH3. WO3 increased acid amount and BaO enhanced the anti-influences to water vapor and SO2. Their synergistic effects made Ce-Sn-W-Ba-Ox/TiO2 exhibit excellent catalytic performance for NH3-SCR, reaching the highest value about 100% at 350 °C in presence of H2O and SO2. Moreover, in situ DRIFTS study showed that the reaction followed L-H mechanism at high temperature and tended to simultaneously follow E-R and L-H mechanisms at low temperature.
KW - Catalytic mechanism
KW - Ce-Sn-W-Ba-O/TiO
KW - Component synergistic catalysis
KW - Selective catalytic reduction
KW - deNOx
UR - http://www.scopus.com/inward/record.url?scp=85079351249&partnerID=8YFLogxK
U2 - 10.1016/j.apsusc.2020.145757
DO - 10.1016/j.apsusc.2020.145757
M3 - 文章
AN - SCOPUS:85079351249
SN - 0169-4332
VL - 512
JO - Applied Surface Science
JF - Applied Surface Science
M1 - 145757
ER -