Hydrogen Preparation From Catalytic Gasification Of Bio-oil Model Compound

As depletion of fossil fuels, renewable energy is becoming a viable substitution energy source. Biomass energy is now a hot research field because it has the advantage of abundance, environmental benign and zero net carbon dioxide discharge. Hydrogen is a clean energy and high attention of has been paid to renewable hydrogen development in many countries. The bio-oil from fast pyrolysis of biomass is easy to transport and centralized for hydrogen production, this is a new way to utilize the bio-oil.In this paper five typical model compounds in the bio-oil has been selected to produce hydrogen via catalytic steam reforming in the fixed bed reactor specially designed for this study. The effects of reaction temperature, steam carbon ration(S/C), feedstock flow rate and catalysts on product gas yield and composition have been conducted. The cause of deactivation of the catalyst and it reproduction were also studied.The results showed that S/C ratio and the reaction temperature are the two major factors influencing the steam reforming process. Their increase can improve hydrogen yield, carbon selection and purity of hydrogen gas, whereas feedstock has minor influence. The optimum conditions for the process are as followed when using five compounds mixture as feedstock. Catalyst:Ni-Cu/coal powder ash;S/C:14;Temperature:650℃,feedstock flow rate:8g-min-1,carrier gas space velocity:0.2m3·h-1. Under the above conditions, the maximum hydrogen yield can attain58.7%,cabon selectivity can attain78.9%. It was found that the deactivation was mainly due to blockage of the hole of the catalyst. Figure [24] table [11] reference [63]...