Hydrogen production from wood vinegar of camellia oleifera shell by Ni/M/γ-Al2O3 catalyst

Hydrogen production from wood vinegar was investigated by catalytic reforming with Ni/M/γ-Al2O3 (M = Co, Cr, Fe) as the catalysts. The maximal H2 yield rate and concentration were 22.03 mg/g sample and 64.33% respectively. And the selectivity sequence for hydrogen is Fe, Cr, Co. After catalytic reforming, the content of the compounds was decreased from 16% to 6%. Especially, the content of the acetic acid was decreased from 5.599% to 1.859%, while the content of the phenol was increased from 0.998% to 1.904% due to the demethylation or the demethoxyation of the phenolic compounds. The characteristic analysis showed that the metals of Fe and Ni were the active centers. The amount of carbon deposit was decreased from 5.53% to 2.66%. The distribution of carbon was also shifted to the lower temperature area.