关键词: 抗焦活化剂, 重油催化裂化, 轻油收率, 焦炭

Abstract: Improving the processing degree of residue and increasing light oil yields are considered as the effective measures for expending benefit of refineries.The anti-coking additive,which can not only restrain aggregation of resin and asphaltene but also regulate the acid sites of FCC catalyst and restrain superfluous free radical reaction,is proved to play a positive role in reducing coke yield as well as increasing light oil yields through reducing the thermal cracking and condensation reaction.An anti-coking named Z-18 was applied in an industrial RFCC unit of Niger refinery and the anti-coking performance was explored.It is indicated that Z-18 displays significant anti-coking performance.The average catalyst consumption is 989.0ppm,which is below the design specification.By using this kind of anti-coking additive,the coke yield of RFCC unit decreases by 0.2% while the light oil yield increases by 1.09% even when the feed properties deteriorate.As a result,an increasing benefit is attained by using anti-coking activator Z-18.

Key words: anti-coking additive Z-18, RFCC, light oil yield, coke