Selective production of methane from aqueous biocarbohydrate streams over a mixture of platinum and ruthenium catalysts.
ChemSusChem
; 7(2): 627-30, 2014 Feb.
Article
in En
| MEDLINE
| ID: mdl-24218081
ABSTRACT
A one-step process for the selective production of methane from low-value aqueous carbohydrate streams is proposed. Sorbitol, used herein as a model compound, is fully converted to methane, CO2 , and a minor amount of H2 by using a physical mixture of Pt and Ru (15 in mass basis) at 220 °C and 35 bar. This conversion is the result of hydrogenolysis of part of the sorbitol over Ru and the in situ production of H2 through the aqueous-phase reforming of the remaining carbohydrate over Pt. A synergistic effect of the combination of these two catalysts results in the rapid and highly selective conversion of the carbohydrate to methane. This process offers the possibility of upgrading a low-value carbohydrate stream into a valuable fuel with no addition of H2. Exergy analysis reveals that nearly 80 % of the exergy of the reactant is recovered as methane.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Platinum
/
Ruthenium
/
Sorbitol
/
Water
/
Methane
Language:
En
Journal:
ChemSusChem
Journal subject:
QUIMICA
/
TOXICOLOGIA
Year:
2014
Document type:
Article