2023
DOI: 10.1111/jiec.13357
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Material flows and embodied energy of direct air capture: A cradle‐to‐gate inventory of selected technologies

Abstract: Direct air capture (DAC) is an essential nexus of CO 2 chemistry and climate mitigation. Life cycle assessment (LCA) is often used to validate the environmental potential of emerging technologies. Consequently, an increased number of ex ante LCAs is expected in this field. However, a comprehensive description through parameterized modeling of life cycle inventories of distinct technological pathways, which is essential for transparency, has recently been missing from the international literature. To fill this … Show more

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Cited by 6 publications
(3 citation statements)
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“…Due to the gas-fired calciner used in conventional L-DAC, there is a clear source of fossil CO 2 that is correctly identified and accounted for in the literature, as the cost is typically reported per ton of CO 2 removed from the atmosphere (LCOD) rather than per ton of CO 2 produced (LCOP). ,, However, the available techno-economic assessments of conventional L-DAC do not consider the compensation of indirect GHG emissions, which have already been identified in several environmental assessments. , This simplification may have led to more optimistic LCODs for conventional L-DAC. Similarly, it is of great importance to quantify the indirect emissions of solar-powered L-DAC in order to compensate for them.…”
Section: Resultsmentioning
confidence: 99%
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“…Due to the gas-fired calciner used in conventional L-DAC, there is a clear source of fossil CO 2 that is correctly identified and accounted for in the literature, as the cost is typically reported per ton of CO 2 removed from the atmosphere (LCOD) rather than per ton of CO 2 produced (LCOP). ,, However, the available techno-economic assessments of conventional L-DAC do not consider the compensation of indirect GHG emissions, which have already been identified in several environmental assessments. , This simplification may have led to more optimistic LCODs for conventional L-DAC. Similarly, it is of great importance to quantify the indirect emissions of solar-powered L-DAC in order to compensate for them.…”
Section: Resultsmentioning
confidence: 99%
“… 3 , 4 , 23 However, the available techno-economic assessments of conventional L-DAC do not consider the compensation of indirect GHG emissions, which have already been identified in several environmental assessments. 7 , 75 77 This simplification may have led to more optimistic LCODs for conventional L-DAC. Similarly, it is of great importance to quantify the indirect emissions of solar-powered L-DAC in order to compensate for them.…”
Section: Resultsmentioning
confidence: 99%
“… The replacement frequency was shortened from 3 years to 1 year, resulting in a comparable sorbent consumption as Climeworks of 3.5 kg/ton CO 2 15 . Additionally, a sorbent lifetime of 5 years is investigated to showcase the extremes 44 . Varying the sorbent material performance, the total capture capacity was halved and multiplied by 1.5.…”
Section: Methodsmentioning
confidence: 99%