Equilibrium and kinetics of nitrous oxide, oxygen and nitrogen adsorption on activated carbon and carbon molecular sieve

Dooyong Park; Youngsan Ju; Jeong Hoon Kim; Hyungwoong Ahn; Chang Ha Lee

doi:10.1016/j.seppur.2019.04.051

Equilibrium and kinetics of nitrous oxide, oxygen and nitrogen adsorption on activated carbon and carbon molecular sieve

Dooyong Park, Youngsan Ju, Jeong Hoon Kim, Hyungwoong Ahn, Chang Ha Lee

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

35 Citations (Scopus)

Abstract

To evaluate candidate adsorbents for the recovery of nitrous oxide (N₂O) from adipic acid off-gases, the equilibrium and kinetics of N₂O and O₂ adsorption on activated carbon (AC) and of N₂O, O₂, and N₂ adsorption on a carbon molecular sieve (CMS) were evaluated at 293, 308, and 323 K under pressures up to 1000 kPa using a high-pressure volumetric system. Adsorption amount of N₂O on AC and CMS exceeded those of N₂ and O₂, and the adsorption isotherms for O₂ and N₂ were similar. The experimental N₂O and O₂ uptakes on AC and CMS were fitted to a non-isothermal adsorption model, whereas the model was ineffective for predicting N₂ uptake on CMS. The isothermal dual-resistance model, considering surface barrier resistance and pore diffusion, adequately predicted N₂ uptake on CMS. The rate of adsorption of N₂O on AC was much lower than that of O₂ and N₂ whereas the rate of adsorption on CMS flowed the order: O₂ > N₂O ≫ N₂, even though N₂O has higher adsorption affinity and smaller kinetic diameter than O₂. The Lewis structure of N₂O was also found to influence the adsorption kinetics.

Original language	English
Pages (from-to)	63-80
Number of pages	18
Journal	Separation and Purification Technology
Volume	223
DOIs	https://doi.org/10.1016/j.seppur.2019.04.051
Publication status	Published - 2019 Sept 15

Bibliographical note

Funding Information:
This research is supported by the “R&D Center for reduction of Non-CO 2 Greenhouse Gases (2016001690005)” funded by Korea Ministry of Environment (MOE) as “Global Top Environment R&D Program”

Publisher Copyright:
© 2019 Elsevier B.V.

All Science Journal Classification (ASJC) codes

Analytical Chemistry
Filtration and Separation

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10.1016/j.seppur.2019.04.051

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title = "Equilibrium and kinetics of nitrous oxide, oxygen and nitrogen adsorption on activated carbon and carbon molecular sieve",

abstract = "To evaluate candidate adsorbents for the recovery of nitrous oxide (N2O) from adipic acid off-gases, the equilibrium and kinetics of N2O and O2 adsorption on activated carbon (AC) and of N2O, O2, and N2 adsorption on a carbon molecular sieve (CMS) were evaluated at 293, 308, and 323 K under pressures up to 1000 kPa using a high-pressure volumetric system. Adsorption amount of N2O on AC and CMS exceeded those of N2 and O2, and the adsorption isotherms for O2 and N2 were similar. The experimental N2O and O2 uptakes on AC and CMS were fitted to a non-isothermal adsorption model, whereas the model was ineffective for predicting N2 uptake on CMS. The isothermal dual-resistance model, considering surface barrier resistance and pore diffusion, adequately predicted N2 uptake on CMS. The rate of adsorption of N2O on AC was much lower than that of O2 and N2 whereas the rate of adsorption on CMS flowed the order: O2 > N2O ≫ N2, even though N2O has higher adsorption affinity and smaller kinetic diameter than O2. The Lewis structure of N2O was also found to influence the adsorption kinetics.",

author = "Dooyong Park and Youngsan Ju and Kim, {Jeong Hoon} and Hyungwoong Ahn and Lee, {Chang Ha}",

note = "Funding Information: This research is supported by the “R&D Center for reduction of Non-CO 2 Greenhouse Gases (2016001690005)” funded by Korea Ministry of Environment (MOE) as “Global Top Environment R&D Program” Publisher Copyright: {\textcopyright} 2019 Elsevier B.V.",

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AU - Park, Dooyong

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AU - Kim, Jeong Hoon

AU - Ahn, Hyungwoong

AU - Lee, Chang Ha

N1 - Funding Information: This research is supported by the “R&D Center for reduction of Non-CO 2 Greenhouse Gases (2016001690005)” funded by Korea Ministry of Environment (MOE) as “Global Top Environment R&D Program” Publisher Copyright: © 2019 Elsevier B.V.

PY - 2019/9/15

Y1 - 2019/9/15

N2 - To evaluate candidate adsorbents for the recovery of nitrous oxide (N2O) from adipic acid off-gases, the equilibrium and kinetics of N2O and O2 adsorption on activated carbon (AC) and of N2O, O2, and N2 adsorption on a carbon molecular sieve (CMS) were evaluated at 293, 308, and 323 K under pressures up to 1000 kPa using a high-pressure volumetric system. Adsorption amount of N2O on AC and CMS exceeded those of N2 and O2, and the adsorption isotherms for O2 and N2 were similar. The experimental N2O and O2 uptakes on AC and CMS were fitted to a non-isothermal adsorption model, whereas the model was ineffective for predicting N2 uptake on CMS. The isothermal dual-resistance model, considering surface barrier resistance and pore diffusion, adequately predicted N2 uptake on CMS. The rate of adsorption of N2O on AC was much lower than that of O2 and N2 whereas the rate of adsorption on CMS flowed the order: O2 > N2O ≫ N2, even though N2O has higher adsorption affinity and smaller kinetic diameter than O2. The Lewis structure of N2O was also found to influence the adsorption kinetics.

AB - To evaluate candidate adsorbents for the recovery of nitrous oxide (N2O) from adipic acid off-gases, the equilibrium and kinetics of N2O and O2 adsorption on activated carbon (AC) and of N2O, O2, and N2 adsorption on a carbon molecular sieve (CMS) were evaluated at 293, 308, and 323 K under pressures up to 1000 kPa using a high-pressure volumetric system. Adsorption amount of N2O on AC and CMS exceeded those of N2 and O2, and the adsorption isotherms for O2 and N2 were similar. The experimental N2O and O2 uptakes on AC and CMS were fitted to a non-isothermal adsorption model, whereas the model was ineffective for predicting N2 uptake on CMS. The isothermal dual-resistance model, considering surface barrier resistance and pore diffusion, adequately predicted N2 uptake on CMS. The rate of adsorption of N2O on AC was much lower than that of O2 and N2 whereas the rate of adsorption on CMS flowed the order: O2 > N2O ≫ N2, even though N2O has higher adsorption affinity and smaller kinetic diameter than O2. The Lewis structure of N2O was also found to influence the adsorption kinetics.

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Equilibrium and kinetics of nitrous oxide, oxygen and nitrogen adsorption on activated carbon and carbon molecular sieve

Abstract

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