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Influence of Pt particle size and support type on the aqueous-phase reforming of glycerol

Lehnert, Kerstin and Claus, Peter (2008):
Influence of Pt particle size and support type on the aqueous-phase reforming of glycerol.
In: Catalysis Communications, pp. 2543-2546, 9, (15), [Online-Edition: http://www.sciencedirect.com/science/article/B6W7K-4SYJS7G-2...],
[Article]

Abstract

The catalytic conversion of glycerol to hydrogen by aqueous-phase reforming (APR) on several platinum based catalysts was studied. Catalysts prepared from a variety of metal precursors, such as platinum ethanolamine, platinum(II)-nitrate, platinum sulfite and tetrammine platinum(II)-nitrate showed similar activities (glycerol conversion 45%) and also identical selectivity (85%) towards hydrogen. The application of different pre-treatment conditions resulted in catalysts with metal particle sizes in a range of 1.6–3.2 nm. In the catalytic reaction selectivity to hydrogen increased with increasing particle size from 78% to 95% while the conversion of glycerol remained nearly constant at 20%. Also, variation of support material from pure γ-alumina to a mixture of γ-, δ- and θ-phases (Puralox®) led to an increase in hydrogen production from 1.2 × 10−3 to 7.6 × 10−3 mol min−1 View the MathML source. The use of crude glycerol as starting material was successful. However, due to impurities (e.g. NaCl) the rate of hydrogen production (7.6 × 10−3 mol min−1 View the MathML source) was lower than observed for pure glycerol (rmax = 3.3 × 10−3 mol min−1 View the MathML source) and decreased dramatically (1 × 10−3 mol min−1 View the MathML source) after about 4 h time on stream.

Item Type: Article
Erschienen: 2008
Creators: Lehnert, Kerstin and Claus, Peter
Title: Influence of Pt particle size and support type on the aqueous-phase reforming of glycerol
Language: English
Abstract:

The catalytic conversion of glycerol to hydrogen by aqueous-phase reforming (APR) on several platinum based catalysts was studied. Catalysts prepared from a variety of metal precursors, such as platinum ethanolamine, platinum(II)-nitrate, platinum sulfite and tetrammine platinum(II)-nitrate showed similar activities (glycerol conversion 45%) and also identical selectivity (85%) towards hydrogen. The application of different pre-treatment conditions resulted in catalysts with metal particle sizes in a range of 1.6–3.2 nm. In the catalytic reaction selectivity to hydrogen increased with increasing particle size from 78% to 95% while the conversion of glycerol remained nearly constant at 20%. Also, variation of support material from pure γ-alumina to a mixture of γ-, δ- and θ-phases (Puralox®) led to an increase in hydrogen production from 1.2 × 10−3 to 7.6 × 10−3 mol min−1 View the MathML source. The use of crude glycerol as starting material was successful. However, due to impurities (e.g. NaCl) the rate of hydrogen production (7.6 × 10−3 mol min−1 View the MathML source) was lower than observed for pure glycerol (rmax = 3.3 × 10−3 mol min−1 View the MathML source) and decreased dramatically (1 × 10−3 mol min−1 View the MathML source) after about 4 h time on stream.

Journal or Publication Title: Catalysis Communications
Volume: 9
Number: 15
Uncontrolled Keywords: Aqueous-phase reforming; Glycerol; Hydrogen; Platinum catalyst
Divisions: 07 Department of Chemistry
07 Department of Chemistry > Fachgebiet Technische Chemie > Technische Chemie II
07 Department of Chemistry > Fachgebiet Technische Chemie
Date Deposited: 20 Mar 2009 08:57
Official URL: http://www.sciencedirect.com/science/article/B6W7K-4SYJS7G-2...
Additional Information:

Available online 11. Juli 2008

Identification Number: doi:10.1016/j.catcom.2008.07.002
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