Abstract: Using different heating carrier C, Al2O3 and adding catalytic material Ni on the carriers, research the cracking of tar model compound toluene with the materials under microwave heating and ordinary oven, investigates the influence of heating method, catalytic component, heat carrier to cracking of toluene. The results show that there is no obvious influence to toluene cracking with microware heating or with ordinary heating, but microwave heating has certain inhibiting function on carbon build-up; when the inlet concentration of toluene is 4.86-5.80 g/Nm3, space-time is 0.124-0.125 s, towards different bed material, the microwave heating cracking rate is 26.24%-55%; and to ordinary heating, under 650℃, the ordinary heating cracking rate with the same bed material is 66.02%-100%; catalytic activity center-Ni has obvious catalytic seletivity on the carrier; meanwhile the crack of toluene, there is small sum of toluene transforming to high aromatic series degree.

Key words: toluene, microwave heat, tar model compound, tar cracking