提高车用汽油质量方法的分析探讨

Study on methods for improving motor gasoline quality

国内汽油池中催化汽油比例高达70%以上,通过多年的装置结构调整和千万吨级大型炼油厂的建设,催化裂化加工比例降至28.4%,催化重整提高至9.5%,但与发达国家相比仍有差距;催化汽油硫含量高、调合比例大是影响国内汽油质量的关键;结合汽油升级的主要质量指标要求,分析国内外汽油池汽油组成和炼油厂装置情况,比较两类催化汽油脱硫技术,建议调整现有装置结构,改变目前汽油调合组分催化汽油比例过高的状况,同时选择先进合理的后处理技术对催化汽油进行脱硫,作为提高车用汽油质量的主要方法。

The FCC gasoline in the gasoline pool in China was over 70%. With the adjustment of config- urations of the petroleum refineries and construction and operation of mego refineries in recent years, the per- centage of FCC processing capacity is lowered to 28.4% while the CCR processing capacity is increased to 9.5%. Whereas, there is still a great gap with the developed countries. The FCC gasoline, which is high in sulfur and blending percentage, has a great impact on the quality of motor gasoline in China. The gasoline compositions of gasoline pools as well as well as refinery process unit configurations both in China and abroad are studied, and two different gasoline desulfurization processes are compared. It is recommended to adjust the existing process unit configurations to reduce the FCC gasoline percentage in the gasoline pool. The selection of state-of-art after-treatment processes is recommended to remove the sulfur from FCC gasoline to improve the quality of motor gasoline.