低碳化学与化工2024，Vol.49Issue(9)：33-40,50,9.DOI:10.12434/j.issn.2097-2547.20240135
制备方法对Cu/Ce0.8Zr0.2O2催化剂催化甲醇水蒸气重整制氢性能的影响
Effects of preparation methods on catalytic performances of Cu/Ce0.8Zr0.2O2 catalysts for methanol steam reforming to produce hydrogen
摘要
Abstract
The preparation methods can affect the type and dispersion of Cu species,as well as the interaction between Cu species and supports in catalysts.Cu/Ce0.8Zr0.2O2 catalysts with Ce0.8Zr0.2O2 sosolid as the support and Cu loading(mass fraction)of 15％were prepared by deposition precipitation,ammonia evaporation,impregnation and co-precipitation methods,respectively.The phase compositions,texture properties,Cu dispersions and microstructures of the catalysts were characterized by XRD,N2 physical adsorption/desorption,N2O titration,SEM,etc.And the catalytic performances of the catalysts for methanol steam reforming to produce hydrogen were evaluated in a fixed-bed reactor.The results show that compared with the Cu/Ce0.8Zr0.2O2 catalysts prepared by another three methods,the Cu/Ce0.8Zr0.2O2 catalyst(Cu/Ce0.8Zr0.2O2-DP)prepared by deposition precipitation method has the largest specific surface area(82.5 m2/g)and Cu specific surface area(206.0 m2/g),as well as the highest Cu dispersion(30.5％).Under the reaction conditions of 250 ℃,atmospheric pressure,n(deionized water)∶n(methanol)of 1.3∶1.0 and liquid space velocity of 6 mL/(g·h)for 24 h,Cu/Ce0.8Zr0.2O2-DP shows relatively optimal catalytic performance with methanol conversion rate of 95.2％,hydrogen production rate of 286.8 mmol/(g·h)and CO selectivity of 0.86％.关键词
甲醇水蒸气重整/Cu基催化剂/制备方法/铈锆固溶体/Cu分散度Key words
methanol steam reforming/Cu-based catalysts/preparation methods/cerium-zirconium sosolid/Cu dispersion分类
化学化工引用本文复制引用
徐青文,柯举仓,李蕊,李鹏,王凤霞,马清祥,赵天生..制备方法对Cu/Ce0.8Zr0.2O2催化剂催化甲醇水蒸气重整制氢性能的影响[J].低碳化学与化工,2024,49(9):33-40,50,9.基金项目
宁夏自然科学基金(2021AAC03108). （2021AAC03108）
