摘要
采用溶胶-凝胶法制备出新型催化剂Mn-Sn-Ce/γ-Al2O3,采用TG-DSC,XRD,XPS,SEM,BET等方法对其晶相结构、形貌结构、活性组分形态、比表面积和孔结构进行了表征,并研究了该催化剂对反渗透浓缩炼油废水中酚类的降解效果及其稳定性。实验结果表明,制备的Mn-Sn-Ce/γ-Al2O3催化剂保持了载体γ-Al2O3的结构特征,Mn主要以β-MnO2形式存在;与改性前相比,复合金属负载改性后的γ-Al2O3粒子分散状况明显改善,粒子具有良好的孔结构,孔分布和孔之间的连接形式得到了改善;表面负载的Mn-Sn-Ce复合金属成分使其活性提高,对酚类的去除率可达97.54%,且改性后的催化剂能重复多次使用,具有良好的稳定性。
A novel catalyst Mn-Sn-Ce/γ-A1203 was prepared by a sol-gel method and characterized by means of TG-DSC, XRD, XPS, SEM and BET. The removal efficiency of phenols in the wastewater from oil refinery on the catalyst and γ-A12O3 was studied. The results showed that after it was modified with Mn-Sn-Ce composite, the structure characteristics of γ-A12O3 were retained, the loaded Mn on the catalyst mainly existed in the form of β-MnO2, the dispersity of the γy-Al2O3 particles, the pore distribution and the connection between the pores were improved, and the composite metal Mn-Sn-Ce loaded on the catalyst surface led to heightening of the catalytic activity for the phenols degradation. The maximum removal efficiency for the phenols reached 97.54%. The modified catalyst has good stability and can be reused many times.
出处
《石油化工》
CAS
CSCD
北大核心
2012年第10期1186-1190,共5页
Petrochemical Technology
