己烯-1和正己烷混合烃在FAU和MFI型分子筛催化剂上的竞争催化

在小型固定流化床装置上，以不同配比的己烯-1和正己烷混合烃为探针，研究了混合烃在300℃下，在3种不同类型分子筛催化剂上的催化反应。结果表明，在3种分子筛催化剂上，己烯-1和正己烷的催化反应具有竞争性。在FAU型分子筛催化剂上，己烯-1摩尔分数小于28.35%时，参与反应的正己烷物质的量变化不大；当己烯-1的摩尔分数大于28.35%时，正己烷很少甚至不参与反应。在MFI型和复合FAU型分子筛催化剂上，混合烃原料中己烯-1的存在对正己烷的转化以及正己烷的生成均有较明显的影响。混合烃催化反应中的骨架异构反应和双键迁移反应为竞争反应。对于MFI型和FAU型分子筛催化剂，己烯-1摩尔分数小于28.35%时，骨架异构反应占优；对于复合FAU型分子筛催化剂，己烯-1摩尔分数小于55.50%时，骨架异构反应占优。

COMPETITIVE CATALYTIC REACTION OF HYDROCARBON MIXTURE OF HEXENE-1 AND/N-HEXANE OVER FAU AND MFI TYPE ZEOLITE CATALYSTS

With the mixtures of hexene-1 and n-hexane as probe, the catalytic reactions were conducted in a fixed fluidized bed reactor over different type zeolite catalysts at the reaction temperature of 300℃. The results showed that the catalytic reactions of hexene-1 and n-hexane over zeolite catalysts were competitive. The mole number of reacted n-hexane was not change over FAU type zeolite catalyst as the molar fraction of hexene-1 was less than 28.35%, while the cracking reaction of n-hexane rarely happened as the molar fraction of hexene-1 was more than 28.35%. The conversion of n-hexane over MFI and MFI+FAU type catalysts was affected by the existence of hexene-1. The isomerization and double bond migration reactions of mixtures were competitive. The isomerization was preference for MFI and FAU type catalysts as the molar fraction of hexene-1 was less than 28.35%, which was preference for MFI+FAU type catalyst as the molar fraction of hexene-1 was less than 55.50%.