Study on kinetics of hydrogen desulfurization of diesel using Ni-Mo/TiO_2-Al_2O_3 as catalyst
The reaction rule of hydrogen desulfurization of diesel using Ni-Mo/TiO2-Al2O3 as catalyst is studied and the experiential model is established in high pressure trickle bed reactor by using mixed diesel as material.The reaction conditions are as follows: the reaction temperature is 280～360 ℃,the hydrogen pressure is 5-7 MPa,the volume ratio of hydrogen to oil is 300-900 and the liquid hourly space velocity(LHSV) is 1-6 h-1.The experimental data are regressed by means of Levenberg-Marquard optimization method,and the relevant parameters of reaction kinetic model are obtained as follows: the reaction order is 2.9,the apparent activation energy is 143 613 J/mol.The kinetic model of hydrogen desulfurization of diesel using Ni-Mo/TiO2-Al2O3 as catalyst in the range of experimental conditions is obtained.The calculation results by model tally well with experimental data.