纳米级CuO催化剂的制备及其糠醛加氢催化性能

Preparation and Catalytic Properties of Nanometer CuO Catalyst for Hydrogenation of Furfural

采用溶液法制备纳米级Cu O催化剂,通过添加不同种类模板剂调控其微结构,利用SEM,XRD,BET方法对催化剂的形貌、结构、物相及比表面积进行表征。表征结果显示,当模板剂为两性离子表面活性剂时,可得到粒径小、比表面积大、分散良好的纯晶相纳米级Cu O催化剂。将该催化剂应用于糠醛加氢制2-甲基呋喃的反应,考察了反应温度、氢与糠醛摩尔比及糠醛液态空速对糠醛加氢反应性能的影响。实验结果表明,在压力0.03 MPa、温度230~240℃、氢与糠醛摩尔比10∶1、糠醛液态空速0.2 h-1的条件下,糠醛转化率为100%,2-甲基呋喃选择性约为95.2%。

Nanometer copper oxide catalysts were prepared by solution method with different templates to control their microstructure. The catalysts were characterized by means of SEM,XRD and BET. The results indicated that the prepared C-3 catalyst with a zwitterionic surfactant as the template had small particle size,large specific surface area and good dispersion of pure Cu O crystalline phase. The effects of reaction temperature,molar ratio of hydrogen to furfural and space velocity on the hydrogenation of furfural to 2-methyl furan over the catalysts were studied. The experimental results showed that under the conditions of pressure of 0.03 MPa,temperature of 230-240 ℃,molar ratio of hydrogen to furfural of 10∶1 and space velocity of 0.2 h-1,the conversion of furfural and the selectivity to 2-methyl furan were 100% and 95.2%,respectively.