摘要
在常压下研究了多种分子筛上NO和NO2的吸附和脱附情况.结果表明,有O2存在时,O2与NO生成的NO2可与NO共吸附在分子筛上,显著促进了NO在分子筛特别是Na型分子筛上的吸附.在所研究的ZSM-5,13X,SAPO,Y,β和A分子筛中,Hβ分子筛在无氧条件下对NO的吸附能力最强;13X分子筛在有氧条件下对NOx的吸附能力最强,且对NOx的吸附性能具有很好的重复性.
The adsorption and desorption performance of different zeolites, such as ZSM-3, 13Y, SAPO, Y, β, and A, for NO and NO2 at 40℃ was investigated in the absence and presence of 10%O2 in 0.02%NO/N2. The TPD results of NO and NO2 revealed that adsorption of NO on the zeolites, especially on sodium form ones, could be substantially increased by the presence of oxygen owing to the co-adsorption of NO and NO2. Among the zeolites tested, Hβ showed the largest capacity for NO adsorption under the conditions without oxygen, whereas 13X zeolite displayed Outstanding behavior for NOx adsorption under the conditions with oxygen.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2007年第3期205-209,共5页
基金
国家自然科学基金(20677006).
关键词
一氧化氮
二氧化氮
吸附
脱附
分子筛
nitric oxide
nitrogen dioxide
adsorption
desorption
zeolite
