Performance of Catalytic Cracking of Biomass Tar and Catalyst Preparation

摘要

The purification of biomass - derived syngas via tar and methane abatement by catalytic cracking over Ni catalysts using naphthalene as model compounds was investigated. The performance of catalyst activity, ageing and regeneration was valued by means of conversion ratio calculating and gas products composition analysis. The catalysts were prepared by using metallic nickel as active phase grafted on dolomite. The results show: the ratio of single conversion on naphthalene is 95% at space time 0.81h~(-1) and 700°C; with saturated air as regeneration gas, the regeneration time is within 0.5h on the condition of program heating; In order to keep the stability at high reaction temperature (700°C), catalysts should be calcined at 900°C for 4h; compared with heat cracking, the catalytic cracking is propitious to deep cracking of naphthalene.