摘要
分别以介孔分子筛MCM-41、MCM-48、SBA-15为载体,采用等体积浸渍法制备了氧化钴/介孔分子筛催化剂,利用N2吸附、X射线衍射、程序升温还原等技术对催化剂进行了表征,考察了Co3O4的负载量及载体的孔结构对催化剂完全催化氧化苯的性能的影响。结果表明,Co3O4的负载量为20%时,催化剂的催化活性最好;载体的孔径和催化剂的可还原性能是影响催化活性的主要因素,催化剂活性顺序为Co3O4/SBA-15>Co3O4/MCM-41>Co3O4/MCM-48。
Co3O4 catalysts supported on various mesoporous molecular sieves, including MCM-41, MCM-48 and SBA-15, were prepared by incipient wetness impregnation method, and these catalysts were characterized by Nitrogen adsorption-desorption, XRD and TPR techniques. Then the influences of cobalt loading and mesoporous molecular sieves on the catalytic activity of catalysts in the complete oxidation of benzene were investigated. The results show that the activity of the catalyst with 20% Co3O4 loading was the best. Besides, the pore diameter of the supports and the reducibility of the catalysts play a key role, and the activity of the cobalt catalysts on different supports is in the following order： Co3O4/SBA-15〉 Co3O4/MCM-41〉 Co3O4/MCM-48.
出处
《环境工程学报》
CAS
CSCD
北大核心
2008年第8期1087-1091,共5页
Chinese Journal of Environmental Engineering
关键词
介孔分子筛
CO3O4
VOCS
催化氧化
孔径
mesoporous molecular sieves Co3O4 VOCs catalytic oxidation pore diameter
