Fe-rich biomass derived char for microwave-assisted methane reforming with carbon dioxide.

Microwave-assisted methane reforming with carbon dioxide was dealt with in this work, using a Fe-rich biomass-derived char by one-step preparation. The main factors on the reforming reaction and stability of this catalyst were evaluated, together with a series of characterization on the produced gas and the used char. The char obtained from biomass pyrolysis with FeO addition of 10% exhibited the best performance on dry reforming reaction. A target CH conversion of 95% over this char was realized at 800 °C. Moreover, H/CO ratio achieved with this char was prone to approach the stoichiometric value. Compared to CO conversion, CH conversion was more promoted with the increase of CO/CH ratio. The variation of CO/CH ratio also leaded to a noticeable changes on H/CO ratio. More importantly, the selected char presented a satisfied stability, evidenced by the total decrease of 4.8% for CH conversion and 3.1% for CO conversion in the test of 160 min. This was contributed to a depressed in-situ carbon consumption and a moderate deterioration of porous structure. Gaseous products obtained with the appropriate char in a long run had a syngas content of 88.79% and H/CO ratio of 0.92 on average.