摘要
考察了稀土钝钒剂（其活性组分为Ｌａ２Ｏ３）对钒污染的ＲＨＺ－３００裂化催化剂的裂化活性、生焦及再生性能的影响。研究结果表明，随着钝钒剂中活性组分Ｌａ２Ｏ３负载量的增加，催化剂的裂解活性也增加，但负载量有一个最佳值。同时，随着钝钒剂加入量的增加，催化剂的裂解活性增加，其加入量也有一个最佳值。稀土钝钒剂能明显地抑制钒污染的ＲＨＺ－３００催化剂的生焦。对催化剂的烧焦反应行为及热重动力学研究表明，稀土钝钒剂的加入能明显地降低烧焦反应的活化能和烧焦温度，并有助于催化剂的低温再生。
The effects of vanadium trapping agent (VTA) La 2O 3 on the performance of the commercial FCC catalyst RHZ-300 with depositial vanadium were investigated in a catalytic micro reactor. Regeneration of the catalyst with and without La 2O 3-containing VTA were carried out in a dynamic thermal gravity unit. It shows that the La 2O 3-containing VTA not only increases obviously activity of the catalyst with vanadium deposition of 0.6%, but also inhibits effectively the coke formation on the RHZ-300 catalyst. Particularly, there exists an optimum value respectively for the loading amount of La 2O 3 on the support of VTA and for the addition amount of La 2O 3-containing VTA in the FCC catalyst. Thermogravity analyses show that the regeneration temperature of the RHZ-300 catalyst with addition of La 2O 3-containing VTA is lower than that without the VTA, and the activation energy of regeneration for the RHZ 300 catalyst with addition of La 2O 3-containing VTA is also obviously lower than that without the VTA. The La 2O 3-containing VTA can enhance the regeneration behavior of the FCC catalyst RHZ-300 at low temperature.
出处
《石油大学学报（自然科学版）》
CSCD
1998年第5期79-82,共4页
Journal of the University of Petroleum,China(Edition of Natural Science)
基金
中国石油天然气总公司"九五"科技攻关项目
关键词
钒
污染
催化剂
再生性能
渣油
稀土钝钒剂
catalysis
rare earth element
vanadium
pollution
activity
catalyst regeneration
