摘要
用ESCA ,XRD ,SEM及TPR等手段表征了不同条件下再生的工业失活加氢裂化催化剂 .结果表明 ,Mo Ni/USY Al2 O3 失活催化剂在实验室装置中快速再生优于慢速再生 ;再生温度对催化剂的结构与性能有影响 .480℃再生能将失活催化剂中绝大部分的碳和氮烧掉 ,且比表面积恢复率最高 ;6 0 0℃再生时 ,催化剂的毛细孔口明显减少 ,且产生少量聚结态 β NiMoO4
Two regeneration methods (slow regeneration and fast regeneration) have been used to regenerate the industrial hydrocracking catalyst. It has been found that the fast regeneration method is better than the slow one for the deactivated Mo Ni/USY Al 2O 3 catalyst. The catalyst regenerated at different temperatures has been investigated by using TPR, XRD, SEM and XPS techniques. The results show that the recovery of surface area, relative crystallinity and mean pore size of the regenerated catalyst is over 90% comparing with the fresh one, when the regeneration temperature is 480 ℃. Considering other parameters, 480 ℃ has been chosen as the optimal regeneration temperature.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2000年第2期156-160,共5页
关键词
加氢裂子
分子筛
失活
再生
催化剂
hydrocracking, zeolite catalyst, deactivation, regeneration, coke
