关键词: 木质素, 苄苯醚, 供氢剂, 微波, 催化转移氢解反应, 反应动力学

Abstract: With benzyl phenyl ether（BPE） as a model compound of lignin，catalytic hydrogenolysis kinetics of benzyl phenyl ether via hydrogen-transfer was studied at the temperature of 413.15—443.15 K，using toluene-4-sulfonic acid (PTSA)as catalyst and 1,2,3,4-tetrahydronaphthalene as hydrogen-donor solvent.Batch reactors with and without microwave-assisted were employed.The first order kinetic model was used to fit the kinetics data.The results indicated that for microwave-assisted reactor，conversion of BPE was greatly improved with increase of PTSA and 1,2,3,4-tetrahydronaphthalene concentration.When both concentrations are 0.1 g·ml^-1，apparent activation energies of BPE hydrogenolysis reaction estimated were 52.45 kJ·mol^-1 for microwave-assisted reactor and 87.82 kJ·mol^-1 for batch one，which means that microwave can make activation energy of hydrogenolysis reaction greatly decrease.This work may provide an alternative way for large-scale utilization of lignin.

Key words: lignin, benzyl phenyl ether, hydrogen-donor solvent, microwave;catalytic transfer hydrogenation;kinetics