Hydrogen production via sorption-enhanced catalytic steam reforming of bio-oil

Hydrogen production via steam reforming of the bio-oil from corn cob by fast pyrolysis with in situ CO2 sorption was investigated. The CaO obtained by calcining Ca(CH3COO)2·H2O showed the best CO2 adsorption efficiency among the three kinds of CaO from different precursors, and thus was selected as CO2 sorbent used in the sorption-enhanced steam reforming process. For the bio-oil steam reforming, when the liquid hourly space velocity was lower than 0.15 h−1, the yield and concentration of H2 tended to the maximum. With the comparison to the case without CO2 sorption, the yield and concentration of H2 with CO2 sorption were obviously improved with the carbon deposition effectively inhibited during the temperature range between 650 °C and 850 °C and the S/C range between 9 and 15. Through the sorption-enhanced steam reforming process, the highest hydrogen yield and concentration were obtained between 750 °C and 800 °C at S/C ratio of 12, and they were over 85% and 90%, respectively.