NiMo/Al2O3催化剂性质与加氢脱硫转化率的定量关系模型

摘要

A series of NiMo/Al2O3 catalysts with different properties was obtained by controlling the metal loading.NiO loading,MoO3 loading and the MoS2 dispersion of the catalysts were considered and a "dynamic super geometric average" was applied to revise the existing model to establish a quantitative relationship between the catalyst properties and the HDS conversion rate.The results indicated that the average relative deviation for the modified model is only 1.13 ％.The optimum MoO3 and NiO loadings are 12 ％-14 ％ and 3 ％-4 ％,respectively,as analyzed by the established model.The results also showed that hydrodesulfurization activity is more sensitive to the content of NiO loading.%通过改变金属负载量得到一系列不同性质的NiMo/A12O3催化剂,定量研究NiO负载量、MoO3负载量和MoS2晶簇表面有效Mo原子分散度3个变量对加氢脱硫(HDS)活性的影响规律.运用“动态超几何平均”的方法对已提出的模型进行修正,建立了二苯并噻吩HDS转化率与催化剂性质的定量关系模型.结果表明:所提出的模型对实验数据拟合的平均相对偏差仅为1.13％;用所建立的模型计算得到最佳的NiO负载量(w)为3％～4％,MoO3负载量(w)为12％～14％o;Mo原子分散度对催化剂的活性具有正面影响;催化剂HDS活性对NiO含量更敏感.