TY - JOUR
T1 - A novel catalyst of silicon cerium complex oxides for selective catalytic reduction of NO by NH3
AU - Xu, Haitao
AU - Shen, Yuesong
AU - Shao, Chenghua
AU - Lin, Fuwen
AU - Zhu, Shemin
AU - Qiu, Tai
PY - 2010/10
Y1 - 2010/10
N2 - A series of CeO2/SiO2 and SixCe 1-xO2 complex oxides supported on an activated Al 2TiO5-TiO2-SiO2 complex phase (ATS) ceramics were prepared by step impregnation and co-impregnation methods, and characterized by N2-BET, XRD, SEM and NH3-TPD techniques. The effects of reaction temperature, CeO2/SiO2 loadings and Si/Ce molar ratio on the granular catalysts for NO selective catalytic reduction with ammonia (NH3-SCR) were studied. Results indicated that both CeO2/SiO2/ATS and CeO2/ATS catalysts showed the same active temperature window of 250-300 °C, mainly depending on the chemical composition of ceria. Moreover, the SixCe 1-xO2/ATS catalysts exhibited higher activity and stability than those of CeO2/SiO2/ATS, and the Si 0.75Ce0.25O2 represented the highest activity of 88.70 at 300 °C and the broadest active temperature window of 250-400 °C. Furthermore, the NH3-SCR of NO over the SixCe 1-xO2 complex oxide catalysts was a result from synergetic catalysis between the acid catalysis and the redox catalysis.
AB - A series of CeO2/SiO2 and SixCe 1-xO2 complex oxides supported on an activated Al 2TiO5-TiO2-SiO2 complex phase (ATS) ceramics were prepared by step impregnation and co-impregnation methods, and characterized by N2-BET, XRD, SEM and NH3-TPD techniques. The effects of reaction temperature, CeO2/SiO2 loadings and Si/Ce molar ratio on the granular catalysts for NO selective catalytic reduction with ammonia (NH3-SCR) were studied. Results indicated that both CeO2/SiO2/ATS and CeO2/ATS catalysts showed the same active temperature window of 250-300 °C, mainly depending on the chemical composition of ceria. Moreover, the SixCe 1-xO2/ATS catalysts exhibited higher activity and stability than those of CeO2/SiO2/ATS, and the Si 0.75Ce0.25O2 represented the highest activity of 88.70 at 300 °C and the broadest active temperature window of 250-400 °C. Furthermore, the NH3-SCR of NO over the SixCe 1-xO2 complex oxide catalysts was a result from synergetic catalysis between the acid catalysis and the redox catalysis.
KW - rare earths
KW - selective catalytic reduction
KW - silicon cerium complex oxides
KW - synergetic catalysis
UR - http://www.scopus.com/inward/record.url?scp=78049462953&partnerID=8YFLogxK
U2 - 10.1016/S1002-0721(09)60188-5
DO - 10.1016/S1002-0721(09)60188-5
M3 - 文章
AN - SCOPUS:78049462953
SN - 1002-0721
VL - 28
SP - 721
EP - 726
JO - Journal of Rare Earths
JF - Journal of Rare Earths
IS - 5
ER -