PS-VI重整催化剂运行初期与末期性能分析

PERFORMANCE ANALYSIS OF PS-VI CONTINUOUS REFORMING CATALYST AT SOR AND EOR

阐述了PS-Ⅵ型连续重整催化剂在中国石化镇海炼化分公司0.8 Mta连续重整装置上工业应用的情况。为全面考察该催化剂的性能,分别在催化剂运行初期(15个运行周期)和末期(541个运行周期)对装置进行了性能标定。结果表明:随着使用时间延长,催化剂比表面积从运行初期的187 m2g下降至末期的143 m2g,铁质量分数从运行初期的280μgg上升至末期的2 400μgg,从而导致运行末期催化剂活性比初期下降4.1℃,稳定汽油收率下降1.77百分点,芳烃收率下降1.13百分点,氢气产率下降0.2百分点,装置的效益下降2813.6万元a。从换剂的技术经济性方面考虑,连续重整催化剂的使用不应该盲目追求时间长,应以实现炼油厂的经济效益最大化为目标,结合目前装置4年一修的运行周期,建议考虑4年更换一次催化剂。

This article expounds the commercial application of PS-Ⅵ catalyst （RC011）,developed by Research Institute of Petroleum Processing,in the 0. 8 Mt/a continuous reforming unit （CRU）of SINOPEC Zhenhai Refining and Chemical Company （ZRCC）. In order to examine if the activity and se-lectivity has changed,the calibrations of the unit are conducted at its SOR and EOR stages. It is discov-ered that after running for 541 operation cycles,the surface area of the catalyst decreases from 187 m2/g at SOR to 143 m2/g at EOR and iron content increases form 280 μ g/g at SOR to 2 400 μ g/g at EOR,re-sulting in decrease of the catalyst activity by 4. 1 ℃and the selectivity of the stabilized gasoline,aromat-ics and H2 yield decreases 1. 77%,1. 13% and 0. 2%,respectively. These changes result in the benefit of the device falling 28. 136 million yuan/a. It is suggested that the replacement of the catalyst be once every 4 years to keep pace with the factory overhaul cycle every four-years.