NO及NO_2与In/HZSM-5催化剂相互作用的微量量热研究  

Microcalorimetric Studies of the Interaction of NO and NO_2 with In/HZSM-5 Catalyst

作　　者：王晓东[1] 沈俭一[2] 张涛[1] 孙孝英[1] 梁东白[1] 林励吾[1] 

机构地区：[1]中国科学院大连化学物理研究所,大连116023 [2]南京大学化学系,南京210093

出　　处：《催化学报》2000年第2期172-174,共3页

摘　　要：The microcalorimetric technique is employed to study the interaction of NO and NO 2 with the In/HZSM 5 catalyst which has been reported to be active for the selective catalytic reduction (SCR) of NO by CH 4. The amounts of chemisorption and differential heat of NO 2 adsorption on In 2O 3, HZSM 5 and In/HZSM 5 are much larger than those of NO. Furthermore, NO 2 adsorption on In 2O 3 is irreversible. Associating with the results of in situ IR and TPD, and the NO x conversion in NO(NO 2)+CH 4 system over In/HZSM 5 and HZSM 5 catalysts, it is reasonable to propose that in the CH 4 SCR process NO 2 plays a key role, and NO 2 species chemisorbed on the HZSM 5 support can migrate to the In sites to react with CH 4.The microcalorimetric technique is employed to study the interaction of NO and NO 2 with the In/HZSM 5 catalyst which has been reported to be active for the selective catalytic reduction (SCR) of NO by CH 4. The amounts of chemisorption and differential heat of NO 2 adsorption on In 2O 3, HZSM 5 and In/HZSM 5 are much larger than those of NO. Furthermore, NO 2 adsorption on In 2O 3 is irreversible. Associating with the results of in situ IR and TPD, and the NO x conversion in NO(NO 2)+CH 4 system over In/HZSM 5 and HZSM 5 catalysts, it is reasonable to propose that in the CH 4 SCR process NO 2 plays a key role, and NO 2 species chemisorbed on the HZSM 5 support can migrate to the In sites to react with CH 4.

关 键 词：氧化氮 铟 HZSM-5分子筛 微量量热 催化反应 

分 类 号：O643[理学—物理化学]