正庚烷在Ni2P/SAPO-11催化剂上的加氢异构化反应性能

采用次磷酸镍过量浸渍-分解法制备了Ni2P/SAPO-11催化剂，通过低温N2吸附-脱附、XRD、HRTEM等分析手段对催化剂进行了表征。以正庚烷为原料，在固定床微反装置上考察了反应条件、Ni2P负载量对正庚烷异构化反应性能的影响，并与Pt/SAPO-11催化剂进行了对比。结果表明：Ni2P/SAPO-11催化剂具有与Pt基催化剂相当的异构化选择性，但异构化活性和芳构化选择性较低；Ni最佳负载量（w）为4%，优化的反应条件为：反应温度400 ℃、压力0.5 MPa、氢烃体积比500、体积空速1 h-1，在此条件下正庚烷的转化率为73.0%，异构化选择性为90%。

HYDROISOMERIZATION OF n-HEPTANE OVER Ni2P/SAPO-11 CATALYST

Ni2P/SAPO-11 catalysts were prepared by the decomposition of nickel hypophosphite impregnated on SAPO-11 supporter through excessive impregnation method. Their properties were characterized by means of N2 sorption-desorption, XRD, HRTEM. The effects of reaction conditions and the nickel phosphide content on hydroisomerization performance of n-heptane were investigated in a fixed-bed reactor. The results showed that Ni2P supported on SAPO-11 molecular sieve had quite highisomerization selectivity, however, the isomerization activity and aromatization selectivity were relatively loweras compared with the Pt-based catalystssupported on SAPO-11. The optimum load of Ni2P on SAPO-11 molecular sieve was 4%. Under the optimal conditions as follows: temperature of 400 ℃, pressure of 0.5 MPa, H2/CH(volume ratio) of 500 and LHSV of 1 h-1, the conversion of n-heptane and the isomerization selectivity reaches 73% and 90% respectively.