Equilibrium adsorption of diethyl ketone on activated carbon in a supercritical CO2 environment: Measurements and thermodynamic modeling

Ushiki, Ikuo; Tahara, Yuto

doi:10.1016/j.jcou.2024.102857

Cited by 1 publication

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“…A thorough understanding of how organic compounds are both desorbed from and adsorbed by porous materials in supercritical CO 2 is crucial for effectively designing and refining the process of regenerating activated carbon with supercritical CO 2 . There is extensive literature covering both the desorption ,, and adsorption − of these organic compounds. These studies indicate that compounds more strongly attached to the adsorbing material, such as VOCs with higher adsorption levels, are tougher to desorb during the regeneration of adsorbents with supercritical CO 2 .…”

Section: Introductionmentioning

confidence: 99%

Adsorption Equilibrium Data of Hexyl Acetate on Activated Carbon under Supercritical CO₂ Conditions

Ushiki,

Matsumoto

2024

J. Chem. Eng. Data

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The regeneration of spent activated carbon that captures alkyl acetate, a major volatile organic compound (VOC) in the printing field, is extremely important for economic and environmental implications. The use of supercritical CO 2 avoids the high heat associated with conventional thermal methods that can degrade the carbon. However, existing research on this is limited in scope, and more comprehensive studies are needed to fully understand the technology. In this study, a fixed-bed adsorption method was used to investigate the adsorption of hexyl acetate on activated carbon in supercritical CO 2 at T = (313−353) K and P = (10−20) MPa. The results are consistent with previous studies on similar VOCs and show the influence of temperature and pressure on adsorption equilibria. Hexyl acetate showed higher adsorption than propyl acetate and ethyl acetate, which may be due to its different volatility in supercritical CO 2 and its different affinity for the absorbent used. The analysis using the Dubinin−Astakhov (DA) equation offers a quantitative understanding of how supercritical CO 2 density and VOC molecular size influence adsorption equilibria. This insight is essential for developing an efficient and eco-friendly regeneration method for the printing industry utilizing supercritical CO 2 .

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Section: Introductionmentioning

confidence: 99%

Adsorption Equilibrium Data of Hexyl Acetate on Activated Carbon under Supercritical CO₂ Conditions

Ushiki,

Matsumoto

2024

J. Chem. Eng. Data

Self Cite

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Equilibrium adsorption of diethyl ketone on activated carbon in a supercritical CO2 environment: Measurements and thermodynamic modeling

Cited by 1 publication

References 85 publications

Adsorption Equilibrium Data of Hexyl Acetate on Activated Carbon under Supercritical CO₂ Conditions

Adsorption Equilibrium Data of Hexyl Acetate on Activated Carbon under Supercritical CO₂ Conditions

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Equilibrium adsorption of diethyl ketone on activated carbon in a supercritical CO2 environment: Measurements and thermodynamic modeling

Cited by 1 publication

References 85 publications

Adsorption Equilibrium Data of Hexyl Acetate on Activated Carbon under Supercritical CO2 Conditions

Adsorption Equilibrium Data of Hexyl Acetate on Activated Carbon under Supercritical CO2 Conditions

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Adsorption Equilibrium Data of Hexyl Acetate on Activated Carbon under Supercritical CO₂ Conditions

Adsorption Equilibrium Data of Hexyl Acetate on Activated Carbon under Supercritical CO₂ Conditions