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Synergies between Direct Air Capture Technologies and Solar Thermochemical Cycles in the Production of Methanol

Prats-Salvado, Enric and Monnerie, Nathalie and Sattler, Christian (2021) Synergies between Direct Air Capture Technologies and Solar Thermochemical Cycles in the Production of Methanol. Energies, 14 (16), p. 4818. Multidisciplinary Digital Publishing Institute (MDPI). doi: 10.3390/en14164818. ISSN 1996-1073.

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Official URL: http://dx.doi.org/10.3390/en14164818


Methanol is an example of a valuable chemical that can be produced from water and carbon dioxide through a chemical process that is fully powered by concentrated solar thermal energy and involves three steps: direct air capture (DAC), thermochemical splitting and methanol synthesis. In the present work, we consider the whole value chain from the harvesting of raw materials to the final product. We also identify synergies between the aforementioned steps and collect them in five possible scenarios aimed to reduce the specific energy consumption. To assess the scenarios, we combined data from low and high temperature DAC with an Aspen Plus® model of a plant that includes water and carbon dioxide splitting units via thermochemical cycles (TCC), CO/CO2 separation, storage and methanol synthesis. We paid special attention to the energy required for the generation of low oxygen partial pressures in the reduction step of the TCC, as well as the overall water consumption. Results show that suggested synergies, in particular, co-generation, are effective and can lead to solar-to-fuel efficiencies up to 10.2% (compared to the 8.8% baseline). In addition, we appoint vacuum as the most adequate strategy for obtaining low oxygen partial pressures.

Item URL in elib:https://elib.dlr.de/143543/
Document Type:Article
Title:Synergies between Direct Air Capture Technologies and Solar Thermochemical Cycles in the Production of Methanol
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Prats-Salvado, Enricenric.pratssalvado (at) dlr.dehttps://orcid.org/0000-0002-9044-1920
Monnerie, Nathalienathalie.monnerie (at) dlr.deUNSPECIFIED
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124
Date:7 August 2021
Journal or Publication Title:Energies
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:Yes
DOI :10.3390/en14164818
Page Range:p. 4818
EditorsEmailEditor's ORCID iD
Publisher:Multidisciplinary Digital Publishing Institute (MDPI)
Series Name:Feature Papers in Energy, Environment and Well-Being
Keywords:Thermochemical cycles; direct air capture; methanol production; process integration; solar energy.
HGF - Research field:Energy
HGF - Program:Materials and Technologies for the Energy Transition
HGF - Program Themes:Chemical Energy Carriers
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Solar Fuels, V - Future Fuels
Location: Köln-Porz
Institutes and Institutions:Institute of Future Fuels > Solar Production Assessment
Deposited By: Prats Salvado, Enric
Deposited On:07 Sep 2021 09:22
Last Modified:07 Sep 2021 09:22

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