关键词: 催化裂化汽油, 加氢精制, 烯烃, 饱和, 加氢反应

Abstract: The reaction rule of olefin saturation during hydrotreating FCC naphtha is studied in a pilot plant unit under various process conditions. Results show that both the reaction rates of hydrodesulfurization and olefin saturation increase with the increase of reaction temperature, yet the influence on the olefin saturation is more significant. For various structure olefins, the olefin saturation rates from high to low are in the order of diolefin＞i-olefin＞n-olefin＞cyclic-olefin. Furthermore, the saturation reactions of cyclic-olefin are more sensitive to the reaction temperature, as well as the saturation reactions of cyclic-olefin and n-olefin are more sensitive to the changes of hydrogen partial pressure than that of i-olefin. The test results of changing LHSV show that under the test conditions the olefin saturation reactions (except diolefins) can be express as pseudo 1 order reaction. The influence of H2/oil ratio on the olefin saturation is less significant, an optimum H2/oil ratio seems to be existed.

Key words: catalytic cracking naphtha, hydrofining, olefin, saturation, hydrogenation reaction