稀土钝钒剂对钒污染催化剂活性与再生性能的影响  

EFFECT OF RARE EARTH VANADIUM TRAPPING AGENT ON ACTIVITY AND REGENERATION ABILITY OF FCC CATALYST

作　　者：王芳珠[1] 卓润生[1] 孙在春[1] 周世新[1] 

机构地区：[1]石油大学炼制系

出　　处：《石油大学学报（自然科学版）》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

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.

关 键 词：钒 污染 催化剂 再生性能 渣油 稀土钝钒剂 

分 类 号：TE624.91[石油与天然气工程—油气加工工程] TE626.25