Ru1LaxOδ／γ-Al2O3催化剂上CO选择性氧化去除性能及焙烧温度的影响  

Study on selective CO oxidation in hydrogen-rich gas and effect of calcined temperature on Ru_1La_xO_δ/γ-Al_2O_3 catalysts

作　　者：陈喜蓉[1] 董新法[1] 邹汉波[2] 陈胜洲[2] 林维明[1] 

机构地区：[1]华南理工大学化工与能源学院,广东广州510641 [2]广州大学化学与化工学院,广东广州510091

出　　处：《现代化工》2008年第3期40-43,共4页Modern Chemical Industry

基　　金：国家自然科学基金(20576023);广东省自然科学基金(06025660)资助项目

摘　　要：采用共浸渍法制备了一系列Ru1LaxOδ／γ-Al2O3复合氧化物催化剂，考察了La2O3的加入量、焙烧温度对CO选择性氧化反应性能的影响。添加La2O3的Ru1LaxOδ／γ-Al2O3催化剂在110～170℃时能达到99％以上的CO转化率，选择性相对较高；镧的加入提高了催化剂的热稳定性。在500℃以前焙烧钌的晶粒大小变化不大，但是焙烧温度达到了600℃后，晶粒明显长大，催化剂活性也随之下降。Ru1LaxOδ/γ-Al2O3 catalysts modified with La2O3 are prepared via incipient co-impregnatlon method, and the preferential oxidation of CO in the hydrogen-rich gas has been examined over the catalysts. The effects of La2O3 loading and different calcined temperatures on the structure and performance of Ru1LaxOδ/γ-Al2O3 are studied. Results show that higher CO conversion （〉99% ） and selectivity in wider temperature range（ 110- 170℃ ）can be obtained after the appropriate quantity of La203 is added to Ru1LaxOδ/γ-Al2O3 can improve the thermal stability of the catalysts. No obvious change is found in particle＇s size after the catalysts are calcined below 500℃, but after cancined at 600℃, the catalysts＇ pore size will increase with activity falling down.

关 键 词：Ru催化剂 CO选择性氧化La2O3 焙烧温度 

分 类 号：O643[理学—物理化学]