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Hydrogen from glycerol steam reforming with a platinum catalyst supported on a SiO2-C composite
Authors:Ivana N. Buffoni  Martín N. Gatti  Gerardo F. Santori  Francisco Pompeo  Nora N. Nichio
Affiliation:1. Facultad de Ingeniería, Universidad Nacional de La Plata, 1 esq 47, 1900, La Plata, Argentina;2. CINDECA, Facultad de Ciencias Exactas, Universidad Nacional de La Plata-CONICET, 47 no 257, 1900, La Plata, Argentina
Abstract:This work studies 2 wt% Pt catalysts. The support is a SiO2-C composite whose main features are a high specific surface due to its mesoporosity, a higher thermal stability than the C support, and the absence of surface acid sites which could promote the dehydration reactions that produce coke precursors. The Pt/SiO2-C catalyst has very small metallic particles (dva = 1.37 nm) that favor the C/>C bond cleavage reactions which allow obtaining total gas conversion at 450 °C. With this catalyst, it is possible to obtain high yields to H<sub>2</sub>, between 4 and 5, which indicates that the active sites promote the WGS reaction, even with glycerol concentrations of 30 and 50%. Pt/SiO<sub>2</sub>-C is a very stable catalyst since it loses only 10% of its initial activity after 66 h on stream and is resistant to sintering and coke deposition.</td>
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Keywords:Hydrogen  Glycerol  Steam reforming  Platinum
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