Abstract: The catalytic performance of n-heptane isomerization on Ni-PMo/MCM-48 was discussed. The catalysts were characterized by using XRD，BET surface area and Py-IR. The effect of reaction temperature，reduction temperature，reduction time，and reduction hydrogen flowrate on the catalytic performance were studied. The result showed that with Ni content 3% and PMo content 30%，reduction temperature 400 ℃，reduction time 4 h，reduction hydrogen flowrate 30 mL/min，and reaction temperature 300 ℃，the activity of Ni-PMo₁₂/MCM-48 was the best，the conversion of n-heptane was 14.2%，and isomerization selectivity to i-heptane could reach 65.6%.

摘要： 制备了Ni-PMo₁₂/MCM-48中孔分子筛催化剂并用于正庚烷异构化反应研究。采用XRD、BET吸附、红外吡啶吸附等方法对催化剂进行表征。研究了反应温度、还原温度、 还原时间和还原氢气流速对异构化催化性能的影响，并考察了催化性能随时间的变化。结果表明，当镍（Ni）和磷钼酸（PMo）质量分数分别为3%和30%、Ni-PMo/MCM-48对正庚烷异构化反应具有较好的异构化性能，还原温度400℃、还原4h、氢气流速为30 mL/min、反应温度300 ℃时，催化剂性能最好，转化率为14.2%时，异构化选择性达到65.6%。