Pt-Pd/Al_2O_3催化剂对甲烷的催化燃烧性能研究  

The catalytic combustion performance of methane over Pt-Pd/Al_2O_3 catalysts

作　　者：陈红香[1] 陶志勇[1] 曹振芳[1] 

机构地区：[1]中国船舶重工集团公司第七一八研究所,河北邯郸056027

出　　处：《舰船科学技术》2010年第12期73-75,110,共4页Ship Science and Technology

摘　　要：采用浸渍法制备了Pt-Pd/Al2O3催化剂,以甲烷为实验气体,详细考察了空速、温度、甲烷浓度等反应条件对该催化剂活性的影响。实验结果表明,对于低浓度的甲烷,催化剂在350℃时活性达到75.3%,完全转化温度T99为400℃;温度、空速、甲烷浓度均对催化剂的活性产生影响,温度越高、空速越低、甲烷浓度越高,催化剂活性越好;在低浓度甲烷条件下,原料气中的氧气浓度对催化剂的活性影响较小;在20%O2/N2气氛中活化催化剂,其活性高于在纯N2气氛中活化的催化剂。Pt-Pd/Al2O3 catalysts were prepared by impregnation,and the influences of reacted conditions were studied in detail.The results showed that the CH4 conversion were 75.3% at 350 ℃,and the temperature at which the conversion achieved 99% was 400 ℃.The catalytic activity was influenced by temperature,space velocity and CH4 concentration,but not O2.The catalysts which were activated in 20%O2/N2 exhibited better activity than in N2.

关 键 词：Pt-Pd/Al2O3催化剂 甲烷 CO氧化 催化燃烧 

分 类 号：O643.3[理学—物理化学]