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Water Footprint and Land Requirement of Solar Thermochemical Jet-Fuel Production

Falter, Christoph and Pitz-Paal, Robert (2017) Water Footprint and Land Requirement of Solar Thermochemical Jet-Fuel Production. Environmental Science & Technology, 51 (21), pp. 12938-12947. American Chemical society (ACS). DOI: 10.1021/acs.est.7b02633 ISSN 0013-936X

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The production of alternative fuels via the solar thermochemical pathway has the potential to provide supply security and to significantly reduce greenhouse gas emissions. H2O and CO2 are converted to liquid hydrocarbon fuels using concentrated solar energy mediated by redox reactions of a metal oxide. Because attractive production locations are in arid regions, the water footprint and the land requirement of this fuel production pathway are analyzed. The water footprint consists of 7.4 liters per liter of jet fuel of direct demand on-site and 42.4 liters per liter of jet fuel of indirect demand, where the dominant contributions are the mining of the rare earth oxide ceria, the manufacturing of the solar concentration infrastructure, and the cleaning of the mirrors. The area-specific productivity is found to be 33 362 liters per hectare per year of jet fuel equivalents, where the land coverage is mainly due to the concentration of solar energy for heat and electricity. The water footprint and the land requirement of the solar thermochemical fuel pathway are larger than the best power-to-liquid pathways but an order of magnitude lower than the best biomass-to-liquid pathways. For the production of solar thermochemical fuels arid regions are best-suited, and for biofuels regions of a moderate and humid climate.

Item URL in elib:https://elib.dlr.de/116904/
Document Type:Article
Title:Water Footprint and Land Requirement of Solar Thermochemical Jet-Fuel Production
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Falter, ChristophBauhaus Luftfahrt e.V., Willy-Messerschmitt-Str. 1, Taufkirchen 82024, GermanyUNSPECIFIED
Pitz-Paal, RobertRobert.Pitz-Paal (at) dlr.dehttps://orcid.org/0000-0002-3542-3391
Journal or Publication Title:Environmental Science & Technology
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:Yes
DOI :10.1021/acs.est.7b02633
Page Range:pp. 12938-12947
Publisher:American Chemical society (ACS)
Keywords:Solar fuel, environmental impact
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Solar Fuels
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Leitungsbereich Solarforschung
Deposited By: Pitz-Paal, Robert
Deposited On:18 Dec 2017 11:44
Last Modified:06 Sep 2019 15:25

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