摘要
采用浸渍法制备了Ru-La_2O_3/γ-Al_2O_3复合氧化物催化剂,在固定床微反装置中考察了催化剂中稀土La的掺杂量、氧气量、原料气中水和CO2含量以及空速等工艺条件对Ru-La_2O_3/γ-Al_2O_3催化剂在CO选择性氧化反应中催化性能的影响。结果表明,Ru/γ-Al_2O_3催化剂添加质量分数10%的La_2O_3后的催化性能较好,且具有较好到抗湿性和抗CO_2能力。在原料气组成为65%H_2,25%CO_2,1%CO,9%He,氧气的分压与CO分压相等,气体流速为100 mL/min和气体空速为10 000 h^(-1)的条件下,在110～170℃进行CO选择性氧化,CO转化率大于99%,CO的出口浓度小于100μL/L,满足了质子交换膜燃料电池对富氢气体中CO浓度的要求。
The Ru-La2O3/γ-Al2O3 complex oxide catalysts with different content of LazO3 were prepared by impregnation method, and the effects of loading amount of La2O3, oxygen dosage, content of H2O and CO2 in the raw material gas and gas hourly space velocity （GHSV） on the catalytic performance of Ru-La2O3/γ-Al2O3 catalyst for oxidation of CO were investigated in a fixed bed microreaetor. The results showed that Ru-La2O3/γ-Al2O3 with La2O3 of mass fraction 10% exhibted excellent catalytic performance, water-resistance and carbon dioxide-resistance. Under the conditions of the raw material gas consisting of 65%H2, 25%CO2, 1%CO and 9%He, gas flux of 100 mL/min, gas hourly space velocity of 10 000 h^-1 , the partial press of O2 equaling to the partial press of CO and 110--170 ℃, the selective oxidation of CO over the catalyst was carried out, and the conversion of CO reached above 99% and the content of CO in the outlet gas was below 100 μL/L, which satisfied the requirement of proton exchange membrane fuel cell （PEMFC）.
出处
《化学反应工程与工艺》
CAS
CSCD
北大核心
2009年第4期371-375,共5页
Chemical Reaction Engineering and Technology
基金
国家自然科学基金(20576023)
江西理工大学博士启动基金
关键词
钌催化剂
一氧化碳
选择性氧化
氧化镧
ruthenium catalyst
carbon monoxide
selective oxidation
lanthanum oxide
