2021
DOI: 10.1002/aic.17403
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Analysis of energetics and economics of sub‐ambient hybrid post‐combustion carbon dioxide capture

Abstract: Adsorption of CO 2 from post-combustion flue gas is one of the leading candidates for globally impactful carbon capture systems. This work focused on understanding the opportunities and limitations of sub-ambient CO 2 capture processes utilizing a multistage separation process. A hybrid process design using a combination of pressure-driven separation of CO 2 from flue gas (e.g., adsorption-or membrane-based separation) followed by CO 2 -rich product liquefaction to produce high-purity (>99%) CO 2 at pipeline c… Show more

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Cited by 8 publications
(16 citation statements)
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“…A promising approach for dealing with rising levels of CO 2 is its sequestration from flue gas. 1 Zeolites are structurally well-defined materials that adsorb CO 2 (such as zeolite LTA, RHO, CHA, KFI, MER, FAU, etc. ), 2−13 while exhibiting excellent thermal, hydrothermal, and mechanical stability, high volumetric-basis CO 2 adsorption capacity, and low cost.…”
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confidence: 99%
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“…A promising approach for dealing with rising levels of CO 2 is its sequestration from flue gas. 1 Zeolites are structurally well-defined materials that adsorb CO 2 (such as zeolite LTA, RHO, CHA, KFI, MER, FAU, etc. ), 2−13 while exhibiting excellent thermal, hydrothermal, and mechanical stability, high volumetric-basis CO 2 adsorption capacity, and low cost.…”
mentioning
confidence: 99%
“…2,7 While kinetic considerations in an actual adsorption bed unit operation can favor CO 2 over H 2 O under transport control, 13,14,18 eventually, over multiple bed cycles, the adsorbed H 2 O accumulates and compromises CO 2 capacity, requiring its removal. 1 If selective zeolites could be synthesized that function under equilibrated humid conditions, without compromising CO 2 capacity, this would represent a new understanding and potentially new opportunities for practical CO 2 sequestration. Here, in this manuscript, we demonstrate unique cooperativity in adsorption between H 2 O and Cs + , wherein H 2 O facilitates the adsorption of CO 2 on Cs-containing RHO zeolites, leading to unprecedented higher equilibrium CO 2 adsorption capacity on Cs-RHO under humid (5% relative humidity) rather than dry conditions.…”
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“…Similar processes have been previously proposed for the flue gas separation. 84 87 Also, despite not being investigated in this work, the structural stability upon gas exposure is crucial for sustainable gas separation applications. These stability tests are typically carried out under dry conditions.…”
Section: Resultsmentioning
confidence: 99%