Life cycle carbon efficiency of Direct Air Capture systems with strong hydroxide sorbents

Jonge, Melinda M.J. de; Daemen, Juul; Loriaux, Jessica M.; Steinmann, Zoran J. N.; Huijbregts, Mark A. J.

doi:10.1016/j.ijggc.2018.11.011

Cited by 93 publications

(71 citation statements)

References 33 publications

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“…in 1999 . In the following decade, a debate among researchers ensued over whether direct air capture (DAC) is (or is not) an important and viable option for reducing greenhouse gas levels . DAC can be differentiated from other methods for CO 2 removal through its use of abiogenic means of extracting CO 2 from the atmosphere.…”

Section: Introductionmentioning

confidence: 99%

Sorbents for the Direct Capture of CO₂ from Ambient Air

et al. 2020

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The urgency to address global climate change induced by greenhouse gas emissions is increasing. In particular, the rise in atmospheric CO2 levels is generating alarm. Technologies to remove CO2 from ambient air, or “direct air capture” (DAC), have recently demonstrated that they can contribute to “negative carbon emission.” Recent advances in surface chemistry and material synthesis have resulted in new generations of CO2 sorbents, which may drive the future of DAC and its large‐scale deployment. This Review describes major types of sorbents designed to capture CO2 from ambient air and they are categorized by the sorption mechanism: physisorption, chemisorption, and moisture‐swing sorption.

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Section: Introductionmentioning

confidence: 99%

Sorbents for the Direct Capture of CO₂ from Ambient Air

et al. 2020

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“…Absorption by aqueous sorbents allows for low costs and continuous operation, 39 but leads to high water loss. 40 Furthermore, sorbent regeneration requires high temperatures. 30,41 In contrast, DAC by adsorption can operate at low regeneration temperatures (< 100°C).…”

Section: Main Textmentioning

confidence: 99%

“…So far, a detailed assessment of this trade-off is only available for GHG emissions for a DAC process with aqueous hydroxy sorbents, where high-temperature heat is usually obtained from natural gas, and the resulting CO2 emissions are re-captured. 20,40 Available assessments for adsorption-based DAC systems consider energy requirements but use proxy data for plant construction and adsorbent. 47,48 Thus, a comprehensive environmental assessment is missing for adsorption-based DAC but urgently needed to establish the role of DAC in climate-change mitigation.…”

Section: Main Textmentioning

confidence: 99%

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How (Carbon) Negative Is Direct Air Capture? Life Cycle Assessment of an Industrial Temperature-Vacuum Swing Adsorption Process

Deutz

Bardow²

2021

Preprint

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Current climate targets require negative emissions. Direct air capture (DAC) is a promising negative emission technology, but energy and materials demands lead to trade-offs with indirect emissions and other environmental impacts. Here, we show by Life Cycle Assessment (LCA) that the first commercial DAC plants in Hinwil and Hellisheiði can achieve negative emissions already today with carbon capture efficiencies of 85.4 % and 93.1 %. Climate benefits of DAC, however, depend strongly on the energy source. When using low-carbon energy, as in Hellisheiði, adsorbent choice and plant construction become important with up to 45 and 15 gCO2e per kg CO2 captured, respectively. Large-scale deployment of DAC for 1 % of the global annual CO2 emissions would not be limited by material and energy availability. Other environmental impacts would increase by less than 0.057 %. Energy source and efficiency are essential for DAC to enable both negative emissions and low-carbon fuels.

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“…The ultimate goal of CCS and DAC is to store and, for the latter, most probably exploit CO 2 as a renewable feedstock in the fine chemical industry, which might be dealt with on a later stage as CCU. 4,5 The sorption of CO 2 takes place via either physisorption or chemisorption. Either processes might require the presence of a nucleophilic atom (e.g., N or O), which results in the formation of carbamic acid (RR′N-CO 2 H)/carbamate (RR′N-CO 2 – X + ; X: sacrificial base, or metal) or carbonate (ionic organic (RO-CO 2 – X + )/inorganic X n CO 3 ) adducts (Scheme 1).…”

Section: Introductionmentioning

confidence: 99%

Biomaterials for CO₂ Harvesting: From Regulatory Functions to Wet Scrubbing Applications

et al. 2019

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A new series of 2-aminoethyl-benzene-based biomaterials, namely, dopamine (DOP), tyramine (TYR), phenylethylamine (PEA), and epinephrine (EPN), dissolved in dimethylsulfoxide (DMSO) have been investigated for CO 2 capture upon activatiing their hydhydrochloride salts with a NaOH pellet. Spectroscopic measurements, including ex situ ATR-FTIR, 1D and 2D NMR experiments have been applied to verify the formation of the sodium carbamate adducts (RR′N-CO 2 – Na + ). The emergence of new peaks in the IR spectra ranging between 1702 and 1735 cm –1 together with the chemical shift within 157–158 ppm in the 13 C NMR, as well as with cross-peaks obtained by 1 H- 15 N HSQC measurements at ca. 84 and 6.6 ppm verified the formation of RR′N-CO 2 – Na + products upon the chemical fixation of CO 2 . The CO 2 sorption capacity of the examined biomaterials was evaluated volumetrically, with a maximum value of 8.18 mmol CO 2 ·g –1 sorbent (36.0 (w/w)%, including both chemisorption and physisorption), for 5 (w/v)% solutions measured at 5 bar CO 2 and 25 °C, for TYR and PEA. DFT calculations indicated that the intramolecular hydrogen bonding within the structural motif of EPN-N-CO 2 – Na + adduct provides an exceptional stability compared to monoethanolamine and other structurally related model compounds.

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Life cycle carbon efficiency of Direct Air Capture systems with strong hydroxide sorbents

Abstract: Number of tables in main text: 1 Number of figures in main text: 3 Number of references in main text: 41

Cited by 93 publications

References 33 publications

Sorbents for the Direct Capture of CO₂ from Ambient Air

Sorbents for the Direct Capture of CO₂ from Ambient Air

How (Carbon) Negative Is Direct Air Capture? Life Cycle Assessment of an Industrial Temperature-Vacuum Swing Adsorption Process

Biomaterials for CO₂ Harvesting: From Regulatory Functions to Wet Scrubbing Applications

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Life cycle carbon efficiency of Direct Air Capture systems with strong hydroxide sorbents

Abstract: Number of tables in main text: 1 Number of figures in main text: 3 Number of references in main text: 41

Cited by 93 publications

References 33 publications

Sorbents for the Direct Capture of CO2 from Ambient Air

Sorbents for the Direct Capture of CO2 from Ambient Air

How (Carbon) Negative Is Direct Air Capture? Life Cycle Assessment of an Industrial Temperature-Vacuum Swing Adsorption Process

Biomaterials for CO2 Harvesting: From Regulatory Functions to Wet Scrubbing Applications

Contact Info

Product

Resources

About

Sorbents for the Direct Capture of CO₂ from Ambient Air

Sorbents for the Direct Capture of CO₂ from Ambient Air

Biomaterials for CO₂ Harvesting: From Regulatory Functions to Wet Scrubbing Applications