An integrated catalytic approach for the production of hydrogen by glycerol reforming coupled with water-gas shift |
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Authors: | Edward L Kunkes Ricardo R Soares Dante A Simonetti James A Dumesic |
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Affiliation: | aDepartment of Chemical and Biological Engineering, University of Wisconsin, 1415 Engineering Drive, Madison, WI 53706, USA;bFaculdade de Engenharia Química, Universidade Federal de Uberlândia, Av. João Naves de Ávila 2121, Uberlândia, MG 38408-100, Brazil |
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Abstract: | Reaction kinetics measurements of glycerol conversion on carbon-supported Pt-based bimetallic catalysts at temperatures from 548 to 623 K show that the addition of Ru, Re and Os to platinum significantly increases the catalyst activity for the production of synthesis gas (H2/CO mixtures) at low temperatures (548–573 K). Based on this finding, we demonstrate a gas phase catalytic process for glycerol reforming, based on the use of two catalyst beds that can be tuned to yield hydrogen (and CO2) or synthesis gas at 573 K and a pressure of 1 atm. The first bed consists of a carbon-supported bimetallic platinum-based catalyst to achieve conversion of glycerol to a H2/CO gas mixture, followed by a second bed comprised of a catalyst that is effective for water-gas shift, such as 1.0% Pt/CeO2/ZrO2. This integrated catalytic system displayed 100% carbon conversion of concentrated glycerol solutions (30–80 wt.%) into CO2 and CO, with a hydrogen yield equal to 80% of the amount that would ideally be obtained from the stoichiometric conversion of glycerol to H2 and CO followed by equilibrated water-gas shift with the water present in the feed. |
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Keywords: | Water-gas shift Reforming Hydrogen Glycerol |
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