Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 33, Issue 17, Pages 4555-4559Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2008.05.063
Keywords
Hydrogen; Methane steam reforming; Equilibrium shift; CO2 absorbent; Lithium silicate
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Equilibrium shifting is considered to be effective for promoting H-2 production by methane (CH4) steam reforming. In this study, a packed bed reactor with a mixture of reforming catalyst and CO2 absorbent was used. Pellets of lithium silicate (Li4SiO4), which Toshiba has developed, were applied as the absorbent. This is a report on the relationship between CO2 absorption by Li4SiO4 pellets and the equilibrium-shift effect for overall reactions. Experiments showed that there was a strong influence of temperature on the equilibrium-shift effect. The effect was obvious, which resulted in keeping not only the concentration of H-2 above 93 vol % but also that of CO below 0.2 vol % at 550 degrees C. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
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