Preliminary investigation on hydrogen-rich gas production by co-steam-reforming of biomass and crude glycerin

摘要

Hydrogen production from renewable biomass is of great interests. Co-steam-reforming of biomass and crude glycerin with the ratio of l:l(w/w) was investigated in a fixed-bed gasifier aiming at improving biomass to hydrogen conversion, focusing on the effects of temperature, pressure, H_2of C ratio and Ca/C ratio on producing gas composition. The results show that high temperature and low pressure favors hydrogen production. With temperature increasing from 650 to 825 ℃, H_2 yield shows a linear increase from 0.053 mol/ kg to 0.059 mol/kg. Both H_2 yield and its mole fraction increase obviously with the increasing H_2O/C ratio. No influence on gas production is found for Ca/C ratio > 1. The study reveals the optimum condition for producing hydrogen is: temperature of 700-750 ℃, pressure of 0.1 MPa, H_2O/C ratio of 1.7-2.25 and Ca/C ratio of 1. Our experimental analysis shows co-steam-reforming of biomass and crude glycerin for hydrogen production is feasible and promising.