According to the 9-lumped kinetic model and the total kinetic model as well as the mechanism of the F-T synthesis wax hydrocracking process

a 5-lumped kinetic model was established.On the basis of the concept of isomerization factor

the experimental results combined with isomerization reaction simulation and the introduction of cracking probability function

the original 9-lumped kinetic model cracking assumption was improved.Cracking probability function made the model more close to the actual hydrocracking process.There were seven reactions in the 5-lumped reaction kinetic model.Two kinds of kinetic models were compared by using the experimental results over the catalyst consisting of platinum (0.6%

mass) supported on amorphous silica alumina modified with H-β.The average relative error between the 5-lumped kinetic model calculations and experimental values was 3.95%.When conversion was higher than 90%

average relative error was below 0.8%.From the comparison

product selectivity could be well predicted by the 5-lumped model.