摘要
以磷元素为改性剂,采用等体积浸渍法对流化催化裂化(FCC)催化剂进行改性,考察了磷酸盐种类、浸渍量、焙烧温度、焙烧时间对FCC催化剂磨损指数影响,确定了最佳改性工艺条件,并将磷改性催化剂进行ACE评价。结果表明:4种磷酸盐改性FCC催化剂均表现出良好的抗磨损性能,磷浸渍量越多,催化剂磨损指数越低;随焙烧温度的升高,磷酸铵改性催化剂(Cat-B-P-3.2)磨损指数先减小后增大;随着焙烧时间的延长,Cat-B-P-3.2催化剂的磨损指数下降,在550℃下焙烧2.0 h后,Cat-B-P-3.2催化剂的性能较佳;以P2O5质量分数1.0%的磷酸铵浸渍的改性FCC催化剂与标准催化剂相比,其产物中焦炭和干气分别降低0.72,0.10个百分点,汽油收率增加0.91个百分点。
With phosphorus as modifier,fluid catalytic cracking(FCC)catalyst was modified by equal volume impregnation method,the effects of phosphate types,impregnation amount,calcination temperature,and calcination time on FCC catalyst′s attrition resistance performance were investigated and the optimal modification process conditions were determined.The phosphorus modified catalysts were then evaluated by ACE catalyst evaluation.The results showed that the four kinds of phosphate modified FCC catalyst all had good attrition resistance,the greater the amount of phosphorus impregnation,the lower the catalyst attrition index;with the increasing of calcination temperature,the attrition index of ammonium phosphate modified catalyst(Cat-B-P-3.2)decreased first then increased;with the extension of calcination time,the attrition index of Cat-B-P-3.2 catalyst had decreased.Under the condition of 550℃calcination for 2.0 h,the performance of Cat-B catalyst was better.Compared with standard catalyst,Cat-B-P-3.2 catalyst′s(the mass fraction of P2O5 in ammonium phosphate 1.0%)dry gas and coke yields had decreased by 0.10 and 0.72 percentage points respectively,while the gasoline yield increased by 0.91 percent point.
作者
王天昀
段宏昌
杨一青
高雄厚
杜正银
WANG Tian-yun;DUAN Hong-chang;YANG Yi-qing;GAO Xiong-hou;DU Zheng-yin(College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,China;Lanzhou Petrochemical Research Center,PetroChina,Lanzhou 730060,China)
出处
《石化技术与应用》
CAS
2020年第5期300-303,共4页
Petrochemical Technology & Application
关键词
催化裂化
催化剂
磷改性
磨损指数
焙烧
fluid catalytic cracking
catalyst
phosphorus modification
attrition index
calcination
