title: Promotion effects of SiO2 or/and Al2O3 doped CeO2/TiO2 catalysts for selective catalytic reduction of NO by NH3.
abstract: A series of the CeO2-based catalysts loaded on TiO2, TiO2-SiO2, TiO2-Al2O3, and TiO2-SiO2-Al2O3 supports were prepared by incipient impregnation method for the selective catalytic reduction (SCR) of NO by NH3 in the presence of oxygen. The SCR activities of the catalysts with different supports increases in the order of Ce/TiO2 < Ce/TiO2-20SiO2 ≈ Ce/TiO2-3.5Al2O3 < Ce/TiO2-20SiO2-3.5Al2O3. The Ce/TiO2-20SiO2-3.5Al2O3 catalyst showed 100% NO conversion in the temperature range of 250-425°C and 100% N2 selectivity in the whole temperature range. The catalytic activity of Ce/TiO2-20SiO2-3.5Al2O3 exhibited good stability and strong resistance to SO2 and H2O poisoning. The co-introduction of SiO2 and Al2O3 into TiO2 could increase the amount of chemisorbed oxygen and Lewis acid sites on the surface of catalyst, which should be responsible for the excellent SCR activity.
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei long Road, Shanghai 200237, China. Electronic address: wenruru@ecust.edu.cn.
authors.forename: Wenru
authors.initials: W
authors.lastname: Zhao
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei long Road, Shanghai 200237, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Tang
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei long Road, Shanghai 200237, China.
authors.forename: Yaping
authors.initials: Y
authors.lastname: Wan
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei long Road, Shanghai 200237, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Li
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei long Road, Shanghai 200237, China.
authors.forename: Si
authors.initials: S
authors.lastname: Yao
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei long Road, Shanghai 200237, China.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Li
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei long Road, Shanghai 200237, China.
authors.forename: Jinlou
authors.initials: J
authors.lastname: Gu
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei long Road, Shanghai 200237, China.
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Li
authors.affiliation: Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, 130 Mei long Road, Shanghai 200237, China; State Key Lab of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Science, 1295 Dingxi Road, Shanghai 200050, China. Electronic address: jlshi@mail.sic.ac.cn.
authors.forename: Jianlin
authors.initials: J
authors.lastname: Shi
mesh_terms: D000393:Air Pollutants / Q000737:chemistry*; D000397:Air Pollution / Q000517:prevention & control; D000537:Aluminum Oxide / Q000737:chemistry; D000641:Ammonia / Q000737:chemistry*; D002384:Catalysis; D002563:Cerium / Q000737:chemistry*; D006358:Hot Temperature; D009569:Nitric Oxide / Q000737:chemistry*; D010084:Oxidation-Reduction; D012822:Silicon Dioxide / Q000737:chemistry; D013458:Sulfur Dioxide / Q000737:chemistry; D014025:Titanium / Q000737:chemistry; D014867:Water / Q000737:chemistry
chemical_list: D000393:Air Pollutants; D014867:Water; D013458:Sulfur Dioxide; C009495:titanium dioxide; D002563:Cerium; D009569:Nitric Oxide; C030583:ceric oxide; D012822:Silicon Dioxide; D000641:Ammonia; D014025:Titanium; D000537:Aluminum Oxide
keywords: CeO(2)/TiO(2) catalyst; Nitrogen oxide; SO(2) durability; Selective catalytic reduction