FUEL 2 |
| Glycerol has many good characteristics that make it an ideal fuel. The energy density of glycerol is (6260 Whr/L) which is higher than ethanol (5442 Whr/L) or methanol (4047 Whr/L). It is a nontoxic byproduct of biodiesel production that has low vapor pressure and is not flammable. Previously a two enzyme cascade of PQQ-ADH and PQQ-AldDH was used to achieve a 70% oxidation of glycerol, showing comparable power densities to the ethanol biofuel cells, and can operate nominally at fuel concentrations near 100% without swelling the PEM which can be problematic with DMFCs. By the addition of oxalate oxidase to the cascade, complete oxidation was achieved. The power density of these bioanodes is significantly higher than either the two enzyme cascade or the oxalate oxidase alone. In addition to complete oxidation, the performance of the bioanodes was increased by incorporating high surface area MWCNT support matrices. |
|
Green Chemistry for Sustainable Energy Supply and Conversion
8:25 AM-12:10 PM, Sunday, April 6, 2008 Morial Convention Center -- Rm. 242, Oral
Sci-Mix
Division of Fuel Chemistry |