不同原料加氢催化裂解制取液化石油气

Investigation of catalytic hydrocracking for different raw materials to liquid petroleum gas

选择正己烷、正庚烷以及不同终馏点直馏汽油作为反应物,用负载金属活性组分的双功能加氢裂解催化剂进行制取液化石油气的考察。结果表明,在双功能加氢裂解催化剂存在下,正庚烷加氢催化裂解制取液化石油气的转化率较正己烷高,超过59%,而选择性相差不大。终馏点180℃直馏汽油气体收率、液化石油气对气体的选择性、液化石油气对原料的收率分别为68.17%、45.69%和31.14%,均比终馏点190℃直馏汽油高(分别为53.37%、39.37%和21.01%)。

Using n-hexane, n-heptane and straight-run gasoline as the reactants, the manufacture of liquid petroleum gas（LPG） by hydrocracking process over the bifunctional catalyst supported with the metal-oxides as the active components was investigated. The results showed that n-heptane conversion of over 59% on the bifunctional catalytic hydrocraeking catalyst was attained, which was more than that of n-hexane, and the selectivity using n-hexane and n-heptane as the reactants had little difference. The gas yield and the selectivity to LPG and the yield of LPG to the raw material （ straight-run gasoline with end distillation point at 180 ℃ ） were 68. 17% , 45. 69% and 31. 14% , respectively, which were more than those using straight-nm gasoline with end distillation point at 190 ℃ as the raw material （53.37% ,39.37% and 21.01%, respectively）.