摘要
采用浸渍法制备了V2 O5/TiO2 催化剂 ,研究了浸渍液和催化剂的红外光谱。利用XRD研究了催化剂中V2 O5的含量和晶相情况 ,V2 O5在催化剂载体表面呈单层分布 ,单层分布实验阈值为 7% ;利用程序升温 (TPD)法研究了NH3在催化剂表面上的脱附 ,起峰温度为40 9K ,峰顶温度为 487K 。
V_2O_5/TiO_2 is prepared by impregnation method and IR spectra of impregnating agents and catalysts are studied. Through XRD the crystalline state of catalysts and the content of TiO_2 in catalysts are investigated. It is found that TiO_2 distributes monolayer on supporter and threshold of monolayer distribution is measured to be 7%(by weight). Furthermore, through Thermal Programmatic Desorption(TPD) desorption of NH_3 on catalysts is studied, and the curve showes only one chemical desorption peak which starts at 409K and reaches the top at 487K.
出处
《环境科学与技术》
CAS
CSCD
2004年第6期23-24,共2页
Environmental Science & Technology
关键词
脱氮
XRD
脱附
单层分布
denitrification
XRD
desorption
monolayer distribution
