Kinetic Study For Liquid Phase Hydrogenation Of Furfuryl Alcohol To Tetrahydrofurfuryl Alcohol On A Ni-Supported Catalyst

Using high-pressure autoclave as reactor and GC as analytic instrument, selective experiments were done in order to develop liquid phase hydrogenation of furfuryl alcohol to tetrahydrofurfuryl alcohol on a Ni-supported catalyst in a semi-batch steady-state operating mode. A new kind of Ni-supported catalyst was finally picked out and proved to have good performance in suitable operating conditions. When the operating conditions were set in reaction temperature 448K and pressure 3.5MPa and catalyst load 20g/L and stirring rate 1200RPM, the hydrogenation of furfuryl alcohol could lead to high furfuryl alcohol conversion 99.6% and high selectivity of tetrahydrofurfuryl alcohol 98.4% within 2.5 hours.The structure of the reaction network was experimentally studied and proved to be consecutive relation by Concentration-Time Graph Data, Because byproducts were found firstly when the furfuryl alcohol conversion reached about 60%. Moreover, the rate coefficients between main and secondary reaction was estimated almost 100 times.In the semi-batch steady-state operating mode, the elimination of mass transfer resistance (including gas-liquid interface, liquid-solid interface and solid interior) was validated, and the effect of different operating conditions to the hydrogenation was studied and finally the suitable operation conditions range were found. In the following operating conditions: temperature 433-453K and pressure 3.0~4.0MPa and catalyst load 20g/L and stirring rate 1200RPM, the kinetic experiments were carriedWithin pressure Within pressure Catalyst operating life was measured in the suitable operating conditions initially, and experimental results indicated that the catalyst could effectively be reused once within 3.8 hours.