Evaluating degradation of CO<sub>2</sub> adsorbents in flue gas from bioenergy with carbon capture and storage

Holmes, Hannah E.; Schreck, Robert D.; Narayanan, Pavithra; Ghosh, Shreya; Sun, Wenting; Realff, Matthew J.; Lively, Ryan P.

doi:10.1039/d3se00823a

Cited by 2 publications

(2 citation statements)

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“…This form of degradation is typically expected in scenarios where sorbent material physically exits the bed, when pores become obstructed with contaminants (fouling), or in cases of structural collapse, where the degradation does not depend on the remaining adsorption sites. 74 Exponential degradation, in contrast to the linear form, depends on the concentration of available sites. This type of degradation is frequently observed in instances of poisoning of chemical adsorbents, where the rate of deactivation is proportional to the remaining sites.…”

Section: Resultsmentioning

confidence: 99%

Tuning sorbent properties to reduce the cost of direct air capture

Holmes,

Banerjee,

Vallace

et al. 2024

Energy Environ. Sci.

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Section: Resultsmentioning

confidence: 99%

Tuning sorbent properties to reduce the cost of direct air capture

Holmes,

Banerjee,

Vallace

et al. 2024

Energy Environ. Sci.

Self Cite

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show abstract

“…This form of degradation is typically expected in scenarios where sorbent material physically exits the bed, when pores become obstructed with contaminants (fouling), or in cases of structural collapse, where the degradation does not depend on the remaining adsorption sites. 69 Exponential degradation, in contrast to the linear form, depends on the concentration of available sites. This type of degradation is frequently observed in instances of poisoning of chemical adsorbents, where the rate of deactivation is proportional to the remaining sites.…”

Section: Different Forms Of Degradationmentioning

confidence: 99%

Tuning sorbent properties to reduce the cost of direct air capture

Holmes,

Banerjee,

Vallace

et al. 2024

Preprint

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The question has shifted from whether solid sorbents can work in direct air capture (DAC) technologies to which solid sorbents are more economically advantaged. Determining this is challenging due to the influence of many different yet interconnected sorbent properties on the cost of CO2 capture. Existing DAC economic models oversimplify sorbent stability by treating it as a simple replacement rate, neglecting crucial factors such as capacity loss rate and form. To address this challenge, we have developed an economic model that accounts for sorbent degradation in DAC processes. By factoring in capacity loss over time, our model provides a more accurate estimate of the cost associated with DAC and highlights the optimum time for sorbent replacement. We then identified sorbent characteristics and process features that minimize both the carbon footprint and the cost of captured CO2. To further investigate the interplay of sorbent properties and DAC cost, we constructed a series of alkyl- and epoxy-functionalized polyamine sorbents. The sorbents’ CO2 uptake, heat of adsorption and capacity fade were adjusted via a one-step modification, varying the proportions of primary, secondary, and tertiary amines. We then integrated the experimentally-measured parameters, including the form of degradation, into our economic model to probe which combination of sorbent properties results in the lowest cost of DAC for a fixed operating condition. The results provide guidelines and priorities for sorbent performance metrics that will yield the most cost-effective DAC technologies.

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Evaluating degradation of CO₂ adsorbents in flue gas from bioenergy with carbon capture and storage

Abstract: The potential degradation of CO2 adsorbents in Bioenergy with Carbon Capture and Storage (BECCS) was investigated through direct exposure to biomass combustion flue gas. Pre- and post-exposure characterization after 6-12...

Cited by 2 publications

References 68 publications

Tuning sorbent properties to reduce the cost of direct air capture

Tuning sorbent properties to reduce the cost of direct air capture

Tuning sorbent properties to reduce the cost of direct air capture

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Evaluating degradation of CO2 adsorbents in flue gas from bioenergy with carbon capture and storage

Abstract: The potential degradation of CO2 adsorbents in Bioenergy with Carbon Capture and Storage (BECCS) was investigated through direct exposure to biomass combustion flue gas. Pre- and post-exposure characterization after 6-12...

Cited by 2 publications

References 68 publications

Tuning sorbent properties to reduce the cost of direct air capture

Tuning sorbent properties to reduce the cost of direct air capture

Tuning sorbent properties to reduce the cost of direct air capture

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Product

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About

Evaluating degradation of CO₂ adsorbents in flue gas from bioenergy with carbon capture and storage