反应条件对高铼重整催化剂催化性能的影响

EFFECT OF REACTION CONDITIONS ON REACTIVITY OF HIGH Re REFORMING CATALYST

在压力连续微反色谱装置上,以正己烷为进料,在不同的反应压力和氢/油分子比下,在Re/Pt质量比分别为2和1的两个催化剂上进行反应。结果表明,(1)改变氢/油比对两个催化剂催化性能的影响不明显;随着压力的增加,芳构化选择性下降,氢解选择性增加,但活性和异构化选择性的变化不大;(2)随着压力和氢/油比的增加,两种催化剂上的积炭量都下降,但高铼催化剂上的积炭量始终比低铼催化剂低。这预示着高铼催化荆有更好的稳定性,或可在更低的压力和氢/油比下使用,从而可以获得更多的液体产物。

The reforming reactions of n-hexane on two catalysts with different Re/Pt mass ratios (1 and 2) have been studied on a continuous-flow pressure microreactor-chromatography under different reaction pressures and H_2/oil ratios. The results show that: (1) the effect of changing H_2/oil mole ratio on reactivity of the catalyst is small, the selectivity of aromatization decreases and the selectivity of hydrogenolysis increases with increasing reaction pressure, but change of activity and selectivity of isomerization is small; (2) coke depositions on the two catalysts decrease with increasing reaction pressure and increasing H_2/oil mole ratio, but coke deposition on high Re catalyst is always lower than that on low Re catalyst. It suggests that high Re catalyst have superior stability or the catalyst can be used with low reaction pressure and low H_2/oil ratio, so that more liquid yield can be obtained.