【摘要】 采用浸渍法制备了Ru-La₂O₃/γ-Al₂O₃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-La₂O₃/γ-Al₂O₃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-Al₂O₃催化剂添加质量分数10%的La₂O₃后的催化性能较好,且具有较好到抗湿性和抗CO₂能力。在原料气组成为65%H₂,25%CO₂,1%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。更多还原

【Abstract】 The Ru-La₂O₃/γ-Al₂O₃ complex oxide catalysts with different content of La₂O₃ were prepared by impregnation method,and the effects of loading amount of La₂O₃,oxygen dosage, content of H₂ O 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 100μL/L,which satisfied the requirement of proton exchange membrane fuel cell（PEMFC）.更多还原