The present review paper examines the production of hydrogen in inert porous media based reformer by thermal partial oxidation Here we consider, specifically, the rich combustion of hydrocarbon fuels and the conversion of H(2)S to hydrogen The different technologies to produce hydrogen beside the experimental and numerical work done in this field are presented The effect of different operating conditions, such as the equivalence ratio, the mass flow rate and the reactant feed temperature are explained Additionally, design parameters, including the reactor geometry and porous material specifications, are discussed (C) 2009 Professor T. Nejat Veziroglu Published by Elsevier Ltd All rights reserved