Equilibrium shifting is considered to be effective for promoting H
2 production by ethanol (C
2H
5OH) steam reforming. In this study, a packed bed reactor with a mixture of reforming catalyst and CO
2 absorbent was used. Lithium silicate (Li
4SiO
4) was applied as the absorbent, which Toshiba has developed. In the case of Li
4SiO
4, CO
2 emission occurs at considerably lower temperature than in the case of the well-known calcium oxide (CaO) and the reaction between Li
4SiO
4 and CO
2 is highly reversible. This is a report of the equilibrium-shift effect on steam reforming of C
2H
5OH, which was obtained by using Li
4SiO
4 pellet (ca. 5 mm). Experiments showed obvious effect, which resulted in keeping not only the concentration of H
2 at 99.3 dry vol% but also that of CO at 0.11 dry vol% for 0.5 hour. This result indicates the possibility of dispensing with a CO-shift reactor and simplifying either CO removal reactor or purification apparatus, in the case of a reformer using a packed bed of pellets. We believe that it would improve the conventional H
2 production system.
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