摘要
采用浸渍法以γ-Al2O3为载体制备了多种低负载量的Pd和Pt催化剂,在微型固定床反应器装置上进行了二甲醚(DME)催化燃烧实验.考察了不同贵金属负载量的Pd/γ-Al2O3和Pt/γ-Al2O3催化剂的活性,及浸渍顺序对PdPt/γ-Al2O3双金属负载催化剂活性的影响,并测试了贵金属负载摩尔比不同的双金属负载催化剂的活性.Pt负载量0.025%(ω)的催化剂在190℃将DME完全燃烧;Pd和Pt共同负载的催化剂[Pd:Pt=2:1(mol),Pt0.025%(ω),Pd0.027%(ω),Pt先负载]性能更好,在175℃将DME完全燃烧;200h实验后2种催化剂活性降低均小于5%.
In order to select desirable catalysts for combustion of dimethyl ether （DME）,a series of low-loading Pd and Pt catalysts were prepared by impregnation on-Al2O3.The effects of loading amount and sequence of the metals on catalytic performance were investigated,and the effect of loading molar ratio of the metals.Using 0.025%（ω） Pt-loaded catalyst,DME was completely converted to CO2 and H2O at 190℃.The catalyst with Pd and Pt loaded together [Pd：Pt=2：1（mol）,Pt 0.025%（ω）,Pd 0.027%（ω）,Pt first-loaded] had better performance,by which DME was completely converted at 175℃.Catalytic activity of these two catalysts was decreased by less than 5% after 200 h reaction.
出处
《过程工程学报》
CAS
CSCD
北大核心
2011年第1期148-152,共5页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:21006057)
中国博士后基金资助项目(编号:20100470182)
关键词
二甲醚
催化燃烧
贵金属
负载型催化剂
dimethyl ether
catalytic combustion
noble metal
supported catalysts
