摘要
本文对Ｃｅ／β分子筛催化剂反应动力学进行了研究，表明该系列催化剂对氮氧化物氨选择还原反应具有良好的催化活性。该催化剂上反应受ＮＯ在氧化态活性位上的吸附控制。通过稳态和非稳态动力学测试，研究了温度对反应的影响规律，测定了反应速率常数随反应温度的变化关系。Ｃｅ离子的引人，提高了催化剂固相与氧的交换能力，从而加快了催化剂上活性位的再生速率。
The SCR reaction kinetics on Ce/β-zeolite catalysts was studied. The results indicatesthat the Ce/β-zeolite catalysts has a good performance in SCR reaction. It is shown that the adsorption ofNO on oxidized active centers was the rate controlling step. With both steady and un-steady kineticexperiment, the influence of temperature on the reaction was investigated, and the relationships betweenrate constants and temperature were measured. The oxygen exchange ability of catalyst was enhanced byion exchange of Ce3+, as a result the regeneration of active center became easier.
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
1999年第3期217-222,共6页
Journal of Chemical Engineering of Chinese Universities
基金
国家教委归国人员基金
关键词
脱氮
氨
选择还原
铈
催化剂
氮氧化物
还原
Removal of nitric oxide, Catalytic selective reduction, Reaction mechanism, kinetics
