Volume 43, Issue 10 pp. 2031-2040
Research Article

Efficient Removal of Ammonia by Hierarchically Porous Carbons from a CO2 Capture Process

Jeong Ho Choi

Jeong Ho Choi

Korea Institute of Energy Research, Greenhouse Gas Research Laboratory, Climate Change Research Division, 152 Gajeong-ro, Yuseong-gu, 34129 Daejeon, Korea

Korea University, Department of Chemical & Biological Engineering, 145 Anam-dong, Seongbuk-gu, 02841 Seoul, Korea

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Jong Tak Jang

Jong Tak Jang

Korea Institute of Energy Research, Greenhouse Gas Research Laboratory, Climate Change Research Division, 152 Gajeong-ro, Yuseong-gu, 34129 Daejeon, Korea

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Soung Hee Yun

Soung Hee Yun

Korea Institute of Energy Research, Greenhouse Gas Research Laboratory, Climate Change Research Division, 152 Gajeong-ro, Yuseong-gu, 34129 Daejeon, Korea

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Won Hee Jo

Won Hee Jo

Korea Institute of Energy Research, Greenhouse Gas Research Laboratory, Climate Change Research Division, 152 Gajeong-ro, Yuseong-gu, 34129 Daejeon, Korea

Korea University, Department of Chemical & Biological Engineering, 145 Anam-dong, Seongbuk-gu, 02841 Seoul, Korea

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Seong Seon Lim

Seong Seon Lim

Korea Institute of Energy Research, Greenhouse Gas Research Laboratory, Climate Change Research Division, 152 Gajeong-ro, Yuseong-gu, 34129 Daejeon, Korea

Korea University, Department of Chemical & Biological Engineering, 145 Anam-dong, Seongbuk-gu, 02841 Seoul, Korea

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Joung Ho Park

Joung Ho Park

Korea Institute of Energy Research, Greenhouse Gas Research Laboratory, Climate Change Research Division, 152 Gajeong-ro, Yuseong-gu, 34129 Daejeon, Korea

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Il Soo Chun

Il Soo Chun

Korea Institute of Energy Research, Greenhouse Gas Research Laboratory, Climate Change Research Division, 152 Gajeong-ro, Yuseong-gu, 34129 Daejeon, Korea

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Jung-Hyun Lee

Corresponding Author

Jung-Hyun Lee

Korea University, Department of Chemical & Biological Engineering, 145 Anam-dong, Seongbuk-gu, 02841 Seoul, Korea

Correspondence: Jung-Hyun Lee ([email protected]), Department of Chemical & Biological Engineering, Korea University, 145 Anam-dong, Seongbuk-gu, Seoul 02841, Korea; Yeo Il Yoon ([email protected]) Greenhouse Gas Research Laboratory, Climate Change Research Division, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea.Search for more papers by this author
Yeo Il Yoon

Corresponding Author

Yeo Il Yoon

Korea Institute of Energy Research, Greenhouse Gas Research Laboratory, Climate Change Research Division, 152 Gajeong-ro, Yuseong-gu, 34129 Daejeon, Korea

Correspondence: Jung-Hyun Lee ([email protected]), Department of Chemical & Biological Engineering, Korea University, 145 Anam-dong, Seongbuk-gu, Seoul 02841, Korea; Yeo Il Yoon ([email protected]) Greenhouse Gas Research Laboratory, Climate Change Research Division, Korea Institute of Energy Research, 152 Gajeong-ro, Yuseong-gu, Daejeon 34129, Korea.Search for more papers by this author
First published: 20 July 2020
Citations: 9

Abstract

The amine-based post-combustion carbon capture process is one of the most efficient methods for treating large-scale CO2, but it produces hazardous products due to chemical transition and degradation of the absorbents. In this study, carbon-based materials were used as adsorbents for the removal of NH3, and their adsorption capacities, adsorption rates, and stabilities were examined by comparing commercial activated carbon (AC) with hierarchically porous carbon (HPC). HPC-Step4 possessed a higher number of total acid sites, resulting in higher NH3 adsorption compared to AC. Despite the similar porosity, HPC-Step4 exhibited a higher adsorption rate constant and the improved kinetics was attributed to its increased portion of mesopores, enhancing the diffusion rate of the adsorbate. Furthermore, HPC-Step4 exhibited better reaction stability than AC.

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