摘要
采用静态氮物理吸附法、X射线衍射及扫描电镜对自行研制的V2O5-WO3-MoO3/TiO2催化剂进行了物化性能表征测定,并在固定床连续积分反应器上进行了活性评价,研究了V2O5、WO3、MoO3等成分的含量对催化剂活性的影响,以及催化剂制备过程中浸泡时间、浸泡液浓度、温度等因素对催化剂负载量的影响.结果表明:催化剂活性成分及助剂比例均存在着最佳值,试验制备的催化剂V2O5/TiO2最佳比例为3%左右,WO3/TiO2比为15%,MoO3/TiO2比为30%;浸泡时间、浸泡液浓度对催化剂负载量的影响基本上呈指数衰减,在足够长的时间内,浸泡液温度只影响催化剂的负载速度,而对于负载量的影响可以忽略.
Physicochemical characteristics of self-developed V2O5-WO3-MoO3/TiO2 catalyst were determined by N2 physical adsorption, XRD and SEM. Activity evaluation of V2O5-WO3-MoO3/TiO2 catalyst was investigated in a fix-bed integral reactor. Effects of V2O5, WO3 and MoO3 content on catalyst activity were analyzed. Influence of impregnation time, maceration extract concentration and temperature during preparation on catalyst loading were investigated. Results show there are optimal ratios for both catalyst activity ingredients and assistants. The optimal ratios of V2O5/TiO2, WO3/TiO2, MoO3/TiO2 in prepared catalyst are 3%, 15% and 30%, respectively. Effects of impregnation time and maceration extract concentration on catalyst loading decay exponentially. In the time long enough, maceration extract temperature affects only loading rate, and its effect on loading amount can be negligible.
出处
《动力工程》
EI
CSCD
北大核心
2008年第5期789-793,798,共6页
Power Engineering
基金
浙江省重大科技专项优先主题资助项目(2007C03004)
