Peer-Reviewed Journal Details
Mandatory Fields
Xia, A., Jacob, A., Herrmann, C., Tabassum, M., Murphy J.D.,
Bioresource Technology
Production of hydrogen, ethanol and volatile fatty acids from the seaweed carbohydrate mannitol
WOS: 48 ()
Optional Fields
Seaweed, Mannitol, Hydrogen, Ethanol Biofuels
Fermentative hydrogen from seaweed is a potential biofuel of the future. Mannitol, which is a typical carbohydrate component of seaweed, was used as a substrate for hydrogen fermentation. The theoretical specific hydrogen yield (SHY) of mannitol was calculated as 5 mol H2/mol mannitol (615.4 mL H2/g mannitol) for acetic acid pathway, 3 mol H2/mol mannitol (369.2 mL H2/g mannitol) for butyric acid pathway and 1 mol H2/mol mannitol (123.1 mL H2/g mannitol) for lactic acid and ethanol pathways. An optimal SHY of 1.82 mol H2/mol mannitol (224.2 mL H2/g mannitol) was obtained by heat pre-treated anaerobic digestion sludge under an initial pH of 8.0, NH4Cl concentration of 25 mM, NaCl concentration of 50 mM and mannitol concentration of 10 g/L. The overall energy conversion efficiency achieved was 96.1%. The energy was contained in the end products, hydrogen (17.2%), butyric acid (38.3%) and ethanol (34.2%).
Grant Details
Science Foundation Ireland
This material is based upon works supported by Science Foundation Ireland (SFI) under Grant No. 12/RC/2302. Researchers are employed by the SFI centre, Marine Renewable Energy Ireland (MaREI). Industrial funding is provided by Gas Networks Ireland through The Green Gas Innovation Group and by ERVIA.