东南大学学报（自然科学版）Issue(1)：92-99,8.DOI:10.3969/j.issn.1001-0505.2016.01.016
TiO2-SnO2基钨催化剂的表面性质和NH3吸附特性及脱硝机理
Surface properties, NH3 adsorption characteristic and NOx removal mechanism of TiO2-SnO2 supported WO3 catalysts
摘要
Abstract
TiO2-SnO2 solid solution was prepared by the co-precipitation method and x%WO3/TiO2-SnO2 catalysts were prepared by the impregnation method.The microstructure, surface properties and NH3 adsorption of catalysts were studied by using BET specific surface area measurement, X-ray dif-fraction (XRD), high-resolution transmission electron microscopy (HRTEM), H2 temperature-pro-grammed reduction (H2-TPR) and in situ diffuse reflectance infrared spectroscopy (in situ DRIFTS). Furthermore, the SCR(selective catalytic reduction) denitration mechanism of catalysts was specula-ted.The results show that after the addition of WO3 , the specific surface area decreases with the in-crease of WO3 loadings of catalysts.WO3 is in a well-dispersed state.The reducible properties of cata-lysts and the amount of Br?nsted acidity are significantly increased.Catalytic activity increases, and the NOx conversions of 12%WO3/TiO2-SnO2 catalysts reaches 90% when the temperature is 280 to 380℃.The results of in situ DRIFTS indicate that the center of catalytic activity is Br?nsted acid site, and the denitration mechanism of the catalysts accords with the reaction mechanism of E-R.关键词
TiO2-SnO2 固溶体/原位漫反射红外/NH3吸附/脱硝机理Key words
TiO2-SnO2 solid solution/in situ diffuse reflectance infrared spectroscopy( DRIFTS)/NH3 adsorption/denitration mechanism分类
化学化工引用本文复制引用
李娟,张亚平,王文选,王龙飞,郭婉秋,杨林军,沈凯..TiO2-SnO2基钨催化剂的表面性质和NH3吸附特性及脱硝机理[J].东南大学学报（自然科学版）,2016,(1):92-99,8.基金项目
国家重点基础研究发展计划（973计划）资助项目（2013CB228505）、国家自然科学基金资助项目（51306034）、江苏省自然科学基金资助项目（BK2012347）． （）
