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采用微型脉冲催化反应技术,在250—450℃和0.3 MPa的条件下,以η-Al_2O_3、HM、0.5wt% Pt/η-Al_2O_3、0.5wt% Pt/HM、0.05wt% Pd/HM、0.5wt% Pd/HM和3.5wt% Pd/HM等为催化剂,研究了已烷异构体转化的反应机理。同时,还研究了C_6烷烃在Pd/HM上的异构化反应中的温度影响以及Pt/Al_2O_3的失活特性。C_6烷烃转化的脉冲量关系和产物分布表明,在HM上的加氢裂化是双分子反应,而在氢压不变的条件下,异构化反应是单分子反应。此外,对异构化反应中生成2,2-二甲基丁烷来说,Pd/HM比Pt/HM的选择性要高。
Using micro-pulse catalytic reaction technique, the reaction was carried out at 250-450 ℃ and 0.3 MPa under the conditions of η-Al 2 O 3, HM, 0.5wt% Pt / η-Al_2O_3, 0.5wt% Pt / HM, wt% Pd / HM and 3.5wt% Pd / HM were used as catalysts to study the reaction mechanism of the conversion of hexane isomers. At the same time, the influence of temperature on the isomerization of C_6 alkanes on Pd / HM and the deactivation of Pt / Al_2O_3 were also studied. The impulse relation and product distribution of C_6 alkane conversion indicate that hydrocracking on HM is bimolecular and isomerization reaction is monomolecular under constant hydrogen pressure. In addition, Pd / HM is more selective than Pt / HM for the formation of 2,2-dimethylbutane in the isomerization reaction.