Investigation of a Dual-Bed Autothermal Reforming of Methane for Hydrogen Production

摘要

This paper presents a performance analysis of a dual-bed autothermal reformer ofrnmethane for hydrogen production. The first section of Pt/Al_2O_3 catalyst is designed forrnoxidation reaction, whereas the second one involves steam reforming reaction based onrnNi/MgAl_2O_4 catalyst. A one dimensional, non-isothermal reactor model was employedrnto examine the reformer performance regarding important operating conditions such asrnH_2O/CH_4 feed ratio; O2/CH_4 feed ratio, temperature and location of steam feed. Thernsimulation results indicate that when the dual-bed reformer was operated at thernH_2O/CH_4 feed ratio of 1.0–2.0 and O_2/CH_4 feed ratio of 0.45–0.60, the methanernconversion of 93% and the H_2/CO product ratio of higher than 2.9 were obtained. Inrnaddition, it was found that adding steam at lower temperatures to the steam reformingrnsection of the dual-bed reformer can produce the synthesis gas with a higher H_2/COrnratio.