摘要
以CuO为主要活性组分制备了CumVnOx/ZSM-5和CuO/γ-Al2O3两种催化剂,分别进行BET,XRD和TEM表征,分析了反应前后催化剂的比表面积,晶型及骨架结构的变化.结果表明:CuV2O6/ZSM-5结构稳定,其失活是由于孔口中毒造成,还原后大部分可恢复;CuO/γ-Al2O3在反应后有部分烧结,其失活是由于结构破坏和均匀吸附中毒造成的,前者是永久性失活,而后者是暂时性失活.优化工艺后的最佳脱硫脱硝效率分别达到99.6%和97.8%,10h内的稳定活性分别为97%和83%.
Two kinds of supported catalysts Cum VnOx/ZSM-5 and CuO/γ-Al2O3, both of their main active component was CuO, were studied in this article. Catalysts preparation, catalytic reactions, catalyst activity evaluation were investigated. BET, XRD and TEM were used to characterize the two catalysts, to analyze changes of surface area, crystal, skeleton structure of catalysts before and after reactions, and to explore the reasons of deactivation. The results showed that the skeleton structure of Cum Vn Ox/ZSM-5 was steady, its deactivation was mainly due to orifice poisoning, which could be mostly renewed after regeneration; The skeleton structure of CuO/γ-Al2O3was burned-out to some degree after reactions, its deactivation was caused by structure breakage and uniform adsorption poisoning, the former was a permanent deactivation, while the latter was a temporary deactivation. The best efficiency of desulfurization and denitrification were 99. 6% and 97.8%, and steady efficiency were 97% and 83% respectively after optimization, which were higher than the value of literatures.
出处
《环境化学》
CAS
CSCD
北大核心
2009年第3期395-399,共5页
Environmental Chemistry
基金
国家863项目(2003AA321020-1)子课题
关键词
脱硫脱硝
铜基催化剂
评价
desulfurization and denitrification, copper-based catalysts, evaluation.
