如何正确使用再生加氢催化剂

Proper Use of Regenerated Hydrogenation Catalyst

废加氢催化剂是一种资源,将废加氢催化剂中最有回收再利用价值的一部分通过再生/重生/再利用,是获取经济效益最具吸引力的方法 ,与购买新鲜加氢催化剂相比,可显著节省费用。对比分析两个案例:案例1中使用REACT技术再生的STARS系列加氢催化剂,与常规再生方法相比,活性可提高20%~60%,REACT技术与STAX技术的结合应用,既可降低加氢催化剂装填成本,又可满足装置运转周期和装置性能要求。案例2中,某2.2Mt/a蜡油加氢装置第一运转周期约27个月,使用再生加氢催化剂后,装置第二运转周期约为18个月,均未达到三年一修、三年一换剂的基本要求。案例2中加氢催化剂失活较快的原因是:第一周期原料油中硅含量超标;第二周期使用的再生FF-18加氢催化剂活性不佳,无使用价值。因此,要正确处理废加氢催化剂,应细化管理,分层卸剂、分析评价、级配装填,及早开发加氢催化剂级配预测模型。

Spent hydrogenation catalyst is a kind of resource.The regeneration/rebirth/reuse of a portion of the spent hydrogenation catalyst,which still has recycle value ,is an attractive method to gain economic efficiency. Compared with buying fresh hydrogenation catalyst,this method can significantly save costs.This paper com- pares and analyzes two cases.In case 1 ,REACT technology,when compared with conventional catalyst regener- ation,results in a 20%-60% activity boost.Applying REACT with Albemarle＇s STAX technology helps to low- er the catalyst loading cost and meet the requirements of running cycle and performance.In Case 2,the first running cycle of a 2.2Mt/a heavy oil hydrotreating unit is about 27 months.After using the regenerated hy- drogenation catalyst,the second running cycle is about 18 months,both failed to meet the basic requirements of three years running cycle.The reasons for the rapid deactivation of hydrogenation catalyst in Case 2 are the over high silicon content in the feed during the first running cycle and the low activity of regenerated FF-18 hydrogenation catalyst used during the second running cycle.It is concluded that the proper use of regenerated hydrogenation catalyst includes fine management,layered catalyst discharging,analysis and evalua- tion, grading loading, and the development of hydrogenation catalyst grading loading forecast model as early as possible.