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在压力连续微反色谱装置上,用模型化合物正己烷、甲基环戊烷、环己烷作进科,在不同Re/Pt 质量比(0～2.5)的铂铼和铂铼钛催化剂上进行反应,结果表明:(1)Re/Pt 比增加,模型化合物的转化率增加,氢解和开环选择性增加,芳构化和异构化选择性下降;预硫化可以降低转化率,抑制氢解和开环活性,改善催化剂异构化选择性。(2)钛能抑制模型化合物的副反应,改善选择性,钛对单铂和高铼催化剂的助剂作用特别明显。(3)Re/Pt 比增加,正己烷在催化剂上反应的积炭减少。这预示着高铼催化剂有更长的使用寿命。
The model compounds n-hexane, methylcyclopentane and cyclohexane were used as feedstocks in a pressure-continuous microreactor equipped with platinum-rhenium and platinum-rhenium catalysts with different Re / Pt ratios (0-2.5) The results showed that: (1) The selectivity of aromatization and isomerization decreased with increasing Re / Pt ratio, increasing the conversion of the model compounds, increasing the hydrogenolysis and ring opening selectivity, and decreasing the selectivity of aromatization and isomerization. Solution and ring-opening activity to improve catalyst isomerization selectivity. (2) Titanium can inhibit the side reaction of model compounds and improve the selectivity. The effect of titanium on the promoters of single platinum and high rhenium catalysts is particularly obvious. (3) The Re / Pt ratio increases and the n-hexane reacts with the catalyst to reduce coke deposition. This indicates that the high rhenium catalyst has a longer service life.