CATALYTIC PERFORMANCE AND ACTIVE-SITES DETERMINATION OF NIOBIUM OXIDE PROMOTED VANADIA-TITANIA CATALYSTS FOR SELECTIVE CATALYTIC REDUCTION OF NITRIC-OXIDE

被引：15
|
作者：
WENG, RY
LEE, JF
机构：
[1] China Technical Consultants Inc., Catalyst Research Center, Miaoli, 35102, P.O. Box 88, Toufen
来源：
APPLIED CATALYSIS A-GENERAL | 1993年 / 105卷 / 01期
关键词：
CATALYST CHARACTERIZATION (BET/IR/TPD/XRD); NIOBIUM OXIDE; NITRIC OXIDE-AMMONIA RECTANGULAR PULSE TECHNIQUE; SELECTIVE CATALYTIC REDUCTION; TITANIA; VANADIA;
D O I：
10.1016/0926-860X(93)85132-9
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of Nb2O5 promoter on V2O5/TiO2 catalysts for selective catalytic reduction (SCR) of nitric oxide was examined. Catalyst characterization was carried out by means of BET surface area measurement, temperature-programmed desorption, infrared spectroscopy and X-ray diffraction. A modified NO-NH3 rectangular pulse (NARP) technique was introduced to measure the number of active sites on the catalyst surface. It was found that both the active sites and the acid sites increase with the content of Nb2O5 due to the increase in BET surface area. The activities of the SCR reaction and the ammonia oxidation are enhanced by the Nb2O5 promoter in the lower and higher temperature ranges, respectively.
引用
收藏
页码：41 / 51
页数：11
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