Abstract
Methane dry reforming with CO 2 using FeO powder in molten salt has been investigated at various flow rates of CH 4/CO 2 mixed gases (CH 4/CO 2=1) between 50 and 400 ml/min at 1223 K in an infrared furnace. This work is carried out to determine the usefulness of this method for the chemical storage of solar energy. The CH 4/CO 2 mixed gases passing through the molten salt (Na 2CO 3/K 2CO 3=1) containing the FeO powder were catalytically decomposed into CO, H 2 and H 2O. The product gas mole ratios, CO/H 2/H 2O, were shown to be 3:1:1 for a high flow rate of 200 ml/min and to be CO/H 2=2:1 for a low flow rate of 50 ml/min. The results were explained in terms of the kinetics of the CH 4-reforming reaction and the thermodynamics of the redox process of FeO powder mixed in the molten salt; CH 4+2FeO⇒2Fe+H 2+CO+H 2O Fe+CO 2⇒FeO+CO for a high flow rate, and FeO+CH 4⇒Fe+2H 2+CO Fe+CO 2⇒FeO+CO for a low flow rate.
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