Show simple item record

dc.contributorVirginia Tech. Department of Biological Systems Engineeringen_US
dc.contributor.authorZhang, Y. H. Percivalen_US
dc.contributor.authorEvans, Barbara R.en_US
dc.contributor.authorMielenz, Jonathan R.en_US
dc.contributor.authorHopkins, Robert C.en_US
dc.contributor.authorAdams, Michael W. W.en_US
dc.date.accessioned2015-10-01T23:24:34Z
dc.date.available2015-10-01T23:24:34Z
dc.date.issued2007-05-23
dc.identifier.citationZhang, Y. H. P., Evans, B. R., Mielenz, J. R., Hopkins, R. C., & Adams, M. W. W. (2007). High-Yield Hydrogen Production from Starch and Water by a Synthetic Enzymatic Pathway. Plos One, 2(5), e456. doi: 10.1371/journal.pone.0000456
dc.identifier.issn1932-6203
dc.identifier.urihttp://hdl.handle.net/10919/56678
dc.description.abstractBackground. The future hydrogen economy offers a compelling energy vision, but there are four main obstacles: hydrogen production, storage, and distribution, as well as fuel cells. Hydrogen production from inexpensive abundant renewable biomass can produce cheaper hydrogen, decrease reliance on fossil fuels, and achieve zero net greenhouse gas emissions, but current chemical and biological means suffer from low hydrogen yields and/or severe reaction conditions. Methodology/Principal Findings. Here we demonstrate a synthetic enzymatic pathway consisting of 13 enzymes for producing hydrogen from starch and water. The stoichiometric reaction is C₆H₁₀O₅ (l)+7 H₂O (l)-> 12 H₂ (g)+ 6 CO₂ (g). The overall process is spontaneous and unidirectional because of a negative Gibbs free energy and separation of the gaseous products with the aqueous reactants. Conclusions. Enzymatic hydrogen production from starch and water mediated by 13 enzymes occurred at 30 degrees C as expected, and the hydrogen yields were much higher than the theoretical limit (4 H(2)/glucose) of anaerobic fermentations. Significance. The unique features, such as mild reaction conditions (30 degrees C and atmospheric pressure), high hydrogen yields, likely low production costs ($~ to 2/kg H₂), and a high energy-density carrier starch (14.8 H₂-based mass%), provide great potential for mobile applications. With technology improvements and integration with fuel cells, this technology also solves the challenges associated with hydrogen storage, distribution, and infrastructure in the hydrogen economy.
dc.description.sponsorshipSun Grant Initiative
dc.description.sponsorshipNational Institute of Food and Agriculture
dc.description.sponsorshipOak Ridge Associated Universities
dc.description.sponsorshipOak Ridge National Laboratory
dc.description.sponsorshipU.S. Department of Energy
dc.description.sponsorshipOffice of Energy Efficiency and Renewable Energy
dc.description.sponsorshipUT–Battelle
dc.description.sponsorshipUSDA-CSREES 2006-38909-03484
dc.description.sponsorshipDE-FG02-05ER15710
dc.description.sponsorshipDE-AC05-00OR22725
dc.description.sponsorshipFWP CEEB06
dc.description.sponsorshipDE-AC05-00OR22725
dc.format.extent6 pages
dc.format.mimetypeapplication/pdfen_US
dc.language.isoen_US
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.titleHigh-Yield Hydrogen Production from Starch and Water by a Synthetic Enzymatic Pathwayen_US
dc.typeArticle - Refereeden_US
dc.contributor.departmentBiological Systems Engineeringen_US
dc.title.serialPloS One
dc.identifier.doihttps://doi.org/10.1371/journal.pone.0000456
dc.identifier.volume2
dc.identifier.issue5
dc.type.dcmitypeTexten_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record