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(CH3-COO)(2)center dot 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 H-2 tended to the maximum. With the comparison to the case without CO2 sorption, the yield and concentration of H-2 with CO2 sorption were obviously improved with the carbon deposition effectively inhibited during the temperature range between 650 degrees C and 850 degrees 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 degrees C and 800 degrees C at S/C ratio of 12, and they were over 85% and 90%, respectively. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.