摘要
采用氧化铝溶胶混合方法制备了4种相应的油烟净化催化剂。使用溶胶负载时控制pH值为酸性有利,以免生成凝胶,堵塞载体孔道。在微波功率为400W条件下,考察了不同活性组分催化剂的升温性能。结果表明,采用NH4VO3为前驱体制备的催化剂升温效果最好,Fe3O4也是较好的吸波升温材料。另外,含MnO2的催化剂吸波升温达到温度最高,与其负载率较高有关,但其升温所需时间较长。采用氧化铝溶胶混合法制备的以NH4VO3为前驱体的不同V2O5负载量的催化剂均有较好的升温性能,随着V2O5负载量的增加,催化剂在微波场下的温度先增加后降低,4%负载量为最佳。
In this paper, four types of catalysts for oil fume purification are prepared using alumina mixed-sol method. It is important to retain the systems acidic during processing to maintain the porosity of the support and prevent gel form ation. The effects of different active components and catalyst loading on heating are studied during microwave irradiation at 400W power. On a per-gram bases, NH4VO3 exhibited the highest heating rate, although, Fe3O4 showed the best overall properties. Catalyst doped with MnO2 raised the highest temperature, during processing, likely because of it high loading weight and longer exposure time. All the catalysts with different amounts of V2O5, prepared by mixed-sol method, using NH4VO3 as a precursor, showed enhanced performance. The maximum obtained temperature of catalyst samples, under microwave irradiation,first increase with V2O5 loading weight, then decrease at concentrations above 4%.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2007年第S2期51-54,共4页
Materials Reports
基金
河南省杰出人才创新基金(0221001200)资助
关键词
氧化铝溶胶混合法
油烟净化催化剂
升温性能
alumina sol-mixed method, catalysts of oil fume purification, temperature rising capability
