摘要 采用溶胶凝胶法制备了一系列Ce、Co掺杂的钛基脱硝催化剂样品,利用多种表征技术对催化剂表面结构、晶型、成分进行表征并考察其选择性催化还原(SCR)脱硝性能。结果表明,Co/Ti(摩尔比)为5.0%、Ce/Ti(摩尔比)为1.0%时制备的Co 0.050-Ce 0.010/TiO2具有最佳的脱硝效率,350~450℃脱硝效率在85%以上,400℃时,脱硝效率最高可达94.7%。Co 0.050-Ce 0.010/TiO2为锐钛矿结构,Co、Ce活性组分在载体表面高度分散或形成无定形结构,并未改变TiO2晶体结构。催化剂比表面积高达126.12 m2/g,且具有丰富的酸性位和化学吸附氧,因此具有优异的SCR脱硝性能。 A series of Ce-Co co-doped TiO2catalyst samples were prepared by the sol-gel method,and the surface structure,crystal form and composition of the catalyst were characterized and analyzed by multiple characterization techniques to investigate their selective catalytic reduction(SCR)denitration performance.The results showed that Co 0.050-Ce 0.010/TiO2prepared when the Co/Ti molar ratio was 5.0%and the Ce/Ti molar ratio was 1.0%had the best denitration efficiency,and the denitration efficiency could reach 85%at 350-450℃,94.7%at 400℃.Co 0.050-Ce 0.010/TiO2had an anatase structure.The active components of Co and Ce were highly dispersed on the surface of the carrier or formed an amorphous structure,which did not change the crystal structure of TiO2.The catalyst had a specific surface area of 126.12 m2/g,and was rich in acid sites and chemically adsorbed oxygen,so it had excellent SCR denitration performance.
出处 《环境污染与防治》 CAS CSCD 北大核心 2021年第4期475-480,共6页 Environmental Pollution & Control
基金 国家重点研发计划项目(No.2018YFB060420103) 国家自然科学基金资助项目(No.51476056)。
分类号 O64 [理学—物理化学]
