TU Darmstadt / ULB / TUbiblio

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

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

Offizielle URL: http://www.sciencedirect.com/science/article/B6W7K-4SYJS7G-2...

Kurzbeschreibung (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.

Typ des Eintrags: Artikel
Erschienen: 2008
Autor(en): Lehnert, Kerstin ; Claus, Peter
Titel: Influence of Pt particle size and support type on the aqueous-phase reforming of glycerol
Sprache: Englisch
Kurzbeschreibung (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.

Titel der Zeitschrift, Zeitung oder Schriftenreihe: Catalysis Communications
Band: 9
(Heft-)Nummer: 15
Freie Schlagworte: Aqueous-phase reforming; Glycerol; Hydrogen; Platinum catalyst
Fachbereich(e)/-gebiet(e): Fachbereich Chemie
Fachbereich Chemie > Technische Chemie > Technische Chemie II
Fachbereich Chemie > Technische Chemie
Hinterlegungsdatum: 20 Mär 2009 08:57
Offizielle URL: http://www.sciencedirect.com/science/article/B6W7K-4SYJS7G-2...
Zusätzliche Informationen:

Available online 11. Juli 2008

ID-Nummer: 10.1016/j.catcom.2008.07.002
Export:

Optionen (nur für Redakteure)

Eintrag anzeigen Eintrag anzeigen