(529b) Hydrogen Production By Methane-Biomass Co-Pyrolysis

Hydrogen is a promising cleanest energy carrier. Although hydrogen is a zero-emission fuel, its suitability also depends on the energy consumed and the cleanliness of the production methods. Conventional methane reforming and coal gasification process for hydrogen production are undesirable due to huge CO₂ emission and energy consumption. Biomass is considered as potential alternative renewable feedstock in the production of chemicals and fuels. As biomass partial combustion can provide heat and potential active catalysts, biochar and intermediates for methane pyrolysis without a net generation of carbon dioxide, we are interested in combining methane pyrolysis with biomass gasification. Temperature programed reaction of biomass/CH₄ copyrolysis was investigated at different heating rate to understand the synergistic effect of biomass on CH₄ decomposition. TG/MS of biomass under Ar atmosphere at different heating rate was utilized to modify the kinetic parameters form TPR and monitor intermediates releasing characteristics during biomass gasification process. BET and SEM/EDS analysis were applied to verify the function of biochar in copyrolysis biomass and methane process. Considering the energy cost, feed cost and CO₂ tax, pyrolysis, water gas shift (WGS) and partial combustion (ATR) technologies for hydrogen production were discussed. Combined the advantages them, an ideal autothermal methane-biomass partial oxidation process which is no heat addition required and makes the overall process net negative in CO₂ can serve as a cost-effective, environmentally friendly strategy to producing hydrogen.