The cycle usage test of Ni/MgO catalyst for the steam reforming of naphthalene/benzene as model tar compounds of biomass gasification

The cycle usage test of Ni/MgO catalyst for the steam reforming of naphthalene/benzene as model tar compounds of biomass gasification were conducted. Both calcined and reduced Ni/MgO catalysts showed same catalytic activities regardless with H2 pretreatment. The carbon species on used catalyst could be completely oxidized by 10% O2/Ar mixture at 873 K for 40 min. This catalyst showed stable activity (carbon based conversion: av. 55%) at 1073 K for 10 h. However, the catalyst lost its activity during cycle usage tests (steam reforming → oxidation → steam reforming).