抗焦活化剂Z-18在尼日尔炼厂重油催化裂化的工业应用效果

摘要

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-1 8 was applied in an industrial RFCC unit of Niger refinery and the anti-coking performance was explored.It is indicated that Z-1 8 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-1 8.%提高重油加工深度、增加轻质油收率是炼厂扩能增效的重要途径。抗焦活化剂通过抑制胶质沥青质聚集、调节催化剂酸性中心以及抑制过量自由基反应等作用,减少了催化裂化反应过程中热裂化和缩合反应的发生,可有效降低重油催化裂化焦炭产率,提高轻质油收率。本文跟踪考察了抗焦活化剂 Z-18在尼日尔炼厂重油催化裂化装置上的工业应用效果。工业应用结果表明,Z-18具有明显的抗焦效果,应用后新鲜催化剂的平均单耗为989.0mg/kg,低于1150mg/kg的设计消耗指标；在原料性质变差的工况下重油催化裂化装置焦炭产率降低了0.2个百分点,轻质油收率增加了1.09个百分点,产品质量未发生明显变化。抗焦活化剂 Z-18的应用可以使重油催化裂化装置产生较好的经济效益。