Optimising H2 production from model biogas via combined steam reforming and CO shift reactions

To optimise H2 production, CO shift reactions were carried out at high (523-723 K) and low temperatures (423-523 K) using commercial catalysts, based on Cu/Fe/Cr and Cu/Zn, respectively. Increasing steam concentrations led to a lean CO, high H2 product. The final product compositions following low temperature CO shift reaction (steam to dry gas ratio of 1.5 at 483 K) yielded H2 at 68% and a CO concentration of 0.2% (equivalent to CO conversion of >99%).