期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 90, 期 3-4, 页码 693-698出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2009.04.032
关键词
Water-gas shift; Reforming; Hydrogen; Glycerol
资金
- U.S. Department of Energy (DOE), Office of Basic Energy Sciences
- CAPES [BEX 2253/04-6]
- FAPEMIG [PPM-TEC APQ-5706-6.01/07]
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 (H-2/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 H-2/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 similar to 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 H-2 and CO followed by equilibrated water-gas shift with the water present in the feed. (C) 2009 Elsevier B.V. All rights reserved.
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