摘要
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。
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.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2016年第B11期443-447,共5页
Chemical Industry and Engineering Progress
