Role of Ultra-micropores in CO2Adsorption on Highly Durable Resin-Based Activated Carbon Beads by Potassium Hydroxide Activation

Kwang Jun Ko; Seongmin Jin; Haeryeong Lee; Kyung Min Kim; Masoud Mofarahi; Chang Ha Lee

doi:10.1021/acs.iecr.1c02430

Role of Ultra-micropores in CO₂Adsorption on Highly Durable Resin-Based Activated Carbon Beads by Potassium Hydroxide Activation

Kwang Jun Ko, Seongmin Jin, Haeryeong Lee, Kyung Min Kim, Masoud Mofarahi, Chang Ha Lee

Department of Chemical and Biomolecular Engineering

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

5 Citations (Scopus)

Abstract

Resin-based activated carbon beads through KOH activation (KRACs; 400-450 μm) were studied to elucidate the role of ultra-micropores in CO₂adsorption and separation. The improved textural properties resulted in an enhancing CO₂adsorption of 55.4% (10.0 wt % at 303 K and 101.3 kPa), showing excellent cyclic stability. The change in CO₂adsorption capacity correlated well with ultra-micropore properties. However, it was noteworthy that excessive developed ultra-micropores reduced the CO₂adsorption rate. In the breakthrough experiments using CO₂/N₂and CO₂/CH₄mixtures, KRAC with the most developed ultra-micropores showed the highest CO₂adsorption capacity, but the tailing was higher. As CO₂concentration increased in the CO₂/N₂mixture, the difference in adsorption capacity from other KRACs was highly reduced. Furthermore, the breakthrough time of the KRAC in the CO₂/CH₄mixture was even shorter than other KRACs due to the preoccupied CH₄despite the highest adsorption capacity of CO₂. The ultra-micropores should be carefully controlled for separation efficiency, considering adsorbates in mixtures.

Original language	English
Pages (from-to)	14547-14563
Number of pages	17
Journal	Industrial and Engineering Chemistry Research
Volume	60
Issue number	40
DOIs	https://doi.org/10.1021/acs.iecr.1c02430
Publication status	Published - 2021 Oct 13

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) and funded by the Ministry of Science and ICT (2019K1A4A7A03113187).

Publisher Copyright:
© 2021 American Chemical Society

All Science Journal Classification (ASJC) codes

Chemistry(all)
Chemical Engineering(all)
Industrial and Manufacturing Engineering

Access to Document

10.1021/acs.iecr.1c02430

Cite this

@article{22f10bd39bda4f4f996884accf898f8b,

title = "Role of Ultra-micropores in CO2Adsorption on Highly Durable Resin-Based Activated Carbon Beads by Potassium Hydroxide Activation",

abstract = "Resin-based activated carbon beads through KOH activation (KRACs; 400-450 μm) were studied to elucidate the role of ultra-micropores in CO2adsorption and separation. The improved textural properties resulted in an enhancing CO2adsorption of 55.4% (10.0 wt % at 303 K and 101.3 kPa), showing excellent cyclic stability. The change in CO2adsorption capacity correlated well with ultra-micropore properties. However, it was noteworthy that excessive developed ultra-micropores reduced the CO2adsorption rate. In the breakthrough experiments using CO2/N2and CO2/CH4mixtures, KRAC with the most developed ultra-micropores showed the highest CO2adsorption capacity, but the tailing was higher. As CO2concentration increased in the CO2/N2mixture, the difference in adsorption capacity from other KRACs was highly reduced. Furthermore, the breakthrough time of the KRAC in the CO2/CH4mixture was even shorter than other KRACs due to the preoccupied CH4despite the highest adsorption capacity of CO2. The ultra-micropores should be carefully controlled for separation efficiency, considering adsorbates in mixtures.",

author = "Ko, {Kwang Jun} and Seongmin Jin and Haeryeong Lee and Kim, {Kyung Min} and Masoud Mofarahi and Lee, {Chang Ha}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) and funded by the Ministry of Science and ICT (2019K1A4A7A03113187). Publisher Copyright: {\textcopyright} 2021 American Chemical Society",

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doi = "10.1021/acs.iecr.1c02430",

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AU - Ko, Kwang Jun

AU - Jin, Seongmin

AU - Lee, Haeryeong

AU - Kim, Kyung Min

AU - Mofarahi, Masoud

AU - Lee, Chang Ha

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) and funded by the Ministry of Science and ICT (2019K1A4A7A03113187). Publisher Copyright: © 2021 American Chemical Society

PY - 2021/10/13

Y1 - 2021/10/13

N2 - Resin-based activated carbon beads through KOH activation (KRACs; 400-450 μm) were studied to elucidate the role of ultra-micropores in CO2adsorption and separation. The improved textural properties resulted in an enhancing CO2adsorption of 55.4% (10.0 wt % at 303 K and 101.3 kPa), showing excellent cyclic stability. The change in CO2adsorption capacity correlated well with ultra-micropore properties. However, it was noteworthy that excessive developed ultra-micropores reduced the CO2adsorption rate. In the breakthrough experiments using CO2/N2and CO2/CH4mixtures, KRAC with the most developed ultra-micropores showed the highest CO2adsorption capacity, but the tailing was higher. As CO2concentration increased in the CO2/N2mixture, the difference in adsorption capacity from other KRACs was highly reduced. Furthermore, the breakthrough time of the KRAC in the CO2/CH4mixture was even shorter than other KRACs due to the preoccupied CH4despite the highest adsorption capacity of CO2. The ultra-micropores should be carefully controlled for separation efficiency, considering adsorbates in mixtures.

AB - Resin-based activated carbon beads through KOH activation (KRACs; 400-450 μm) were studied to elucidate the role of ultra-micropores in CO2adsorption and separation. The improved textural properties resulted in an enhancing CO2adsorption of 55.4% (10.0 wt % at 303 K and 101.3 kPa), showing excellent cyclic stability. The change in CO2adsorption capacity correlated well with ultra-micropore properties. However, it was noteworthy that excessive developed ultra-micropores reduced the CO2adsorption rate. In the breakthrough experiments using CO2/N2and CO2/CH4mixtures, KRAC with the most developed ultra-micropores showed the highest CO2adsorption capacity, but the tailing was higher. As CO2concentration increased in the CO2/N2mixture, the difference in adsorption capacity from other KRACs was highly reduced. Furthermore, the breakthrough time of the KRAC in the CO2/CH4mixture was even shorter than other KRACs due to the preoccupied CH4despite the highest adsorption capacity of CO2. The ultra-micropores should be carefully controlled for separation efficiency, considering adsorbates in mixtures.

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