Adsorption enhanced reforming (AER) is a novel hydrogen generation method. To study hydrogen yield and graphite formation in the AER process, a recently developed thermodynamic code for reaction-adsorption systems is extended to account for the formation of condensed species. Parametric analysis of the steam reforming of ethanol is performed to study the effect of adsorption and other parameters (temperature, pressure, steam/carbon ratio and O(2)/ethanol ratio in the feed) on the yield of hydrogen and the formation of graphite. It is shown that with CO(2) adsorption, the hydrogen yield is enhanced while the graphite formation is suppressed. Based on the thermodynamic analysis, AER is a potential low-temperature method for hydrogen generation (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.