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Exploiting equilibrium-kinetic synergetic effect for separation of ethylene and ethane in a microporous metal-organic framework

Physisorption is a promising technology to cut cost for separating ethylene (C(2)H(4)) from ethane (C(2)H(6)), the most energy-intensive separation process in the petrochemical industry. However, traditional thermodynamically selective adsorbents exhibit limited C(2)H(4)/C(2)H(6) selectivity due to...

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Autores principales: Ding, Qi, Zhang, Zhaoqiang, Yu, Cong, Zhang, Peixin, Wang, Jun, Cui, Xili, He, Chao-Hong, Deng, Shuguang, Xing, Huabin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Association for the Advancement of Science 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7148085/
https://www.ncbi.nlm.nih.gov/pubmed/32300657
http://dx.doi.org/10.1126/sciadv.aaz4322
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author Ding, Qi
Zhang, Zhaoqiang
Yu, Cong
Zhang, Peixin
Wang, Jun
Cui, Xili
He, Chao-Hong
Deng, Shuguang
Xing, Huabin
author_facet Ding, Qi
Zhang, Zhaoqiang
Yu, Cong
Zhang, Peixin
Wang, Jun
Cui, Xili
He, Chao-Hong
Deng, Shuguang
Xing, Huabin
author_sort Ding, Qi
collection PubMed
description Physisorption is a promising technology to cut cost for separating ethylene (C(2)H(4)) from ethane (C(2)H(6)), the most energy-intensive separation process in the petrochemical industry. However, traditional thermodynamically selective adsorbents exhibit limited C(2)H(4)/C(2)H(6) selectivity due to their similar physiochemical properties, and the performance enhancement is typically at the expense of elevated adsorption heat. Here, we report highly-efficient C(2)H(4)/C(2)H(6) adsorption separation in a phosphate-anion pillared metal-organic framework ZnAtzPO(4) exploiting the equilibrium-kinetic synergetic effect. The periodically expanded and contracted aperture decorated with electronegative groups within ZnAtzPO(4) enables effective trapping of C(2)H(4) and impedes the diffusion of C(2)H(6), offering an extraordinary equilibrium-kinetic combined selectivity of 32.4. The adsorption heat of C(2)H(4) on ZnAtzPO(4) (17.3 to 30.0 kJ mol(−1)) is substantially lower than many thermodynamically selective adsorbents because its separation capability only partially relies on thermodynamics. The separation mechanism was explored by computational simulations, and breakthrough experiments confirmed the excellent C(2)H(4)/C(2)H(6) separation performance of ZnAtzPO(4).
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spelling pubmed-71480852020-04-16 Exploiting equilibrium-kinetic synergetic effect for separation of ethylene and ethane in a microporous metal-organic framework Ding, Qi Zhang, Zhaoqiang Yu, Cong Zhang, Peixin Wang, Jun Cui, Xili He, Chao-Hong Deng, Shuguang Xing, Huabin Sci Adv Research Articles Physisorption is a promising technology to cut cost for separating ethylene (C(2)H(4)) from ethane (C(2)H(6)), the most energy-intensive separation process in the petrochemical industry. However, traditional thermodynamically selective adsorbents exhibit limited C(2)H(4)/C(2)H(6) selectivity due to their similar physiochemical properties, and the performance enhancement is typically at the expense of elevated adsorption heat. Here, we report highly-efficient C(2)H(4)/C(2)H(6) adsorption separation in a phosphate-anion pillared metal-organic framework ZnAtzPO(4) exploiting the equilibrium-kinetic synergetic effect. The periodically expanded and contracted aperture decorated with electronegative groups within ZnAtzPO(4) enables effective trapping of C(2)H(4) and impedes the diffusion of C(2)H(6), offering an extraordinary equilibrium-kinetic combined selectivity of 32.4. The adsorption heat of C(2)H(4) on ZnAtzPO(4) (17.3 to 30.0 kJ mol(−1)) is substantially lower than many thermodynamically selective adsorbents because its separation capability only partially relies on thermodynamics. The separation mechanism was explored by computational simulations, and breakthrough experiments confirmed the excellent C(2)H(4)/C(2)H(6) separation performance of ZnAtzPO(4). American Association for the Advancement of Science 2020-04-10 /pmc/articles/PMC7148085/ /pubmed/32300657 http://dx.doi.org/10.1126/sciadv.aaz4322 Text en Copyright © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC). http://creativecommons.org/licenses/by-nc/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial license (http://creativecommons.org/licenses/by-nc/4.0/) , which permits use, distribution, and reproduction in any medium, so long as the resultant use is not for commercial advantage and provided the original work is properly cited.
spellingShingle Research Articles
Ding, Qi
Zhang, Zhaoqiang
Yu, Cong
Zhang, Peixin
Wang, Jun
Cui, Xili
He, Chao-Hong
Deng, Shuguang
Xing, Huabin
Exploiting equilibrium-kinetic synergetic effect for separation of ethylene and ethane in a microporous metal-organic framework
title Exploiting equilibrium-kinetic synergetic effect for separation of ethylene and ethane in a microporous metal-organic framework
title_full Exploiting equilibrium-kinetic synergetic effect for separation of ethylene and ethane in a microporous metal-organic framework
title_fullStr Exploiting equilibrium-kinetic synergetic effect for separation of ethylene and ethane in a microporous metal-organic framework
title_full_unstemmed Exploiting equilibrium-kinetic synergetic effect for separation of ethylene and ethane in a microporous metal-organic framework
title_short Exploiting equilibrium-kinetic synergetic effect for separation of ethylene and ethane in a microporous metal-organic framework
title_sort exploiting equilibrium-kinetic synergetic effect for separation of ethylene and ethane in a microporous metal-organic framework
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7148085/
https://www.ncbi.nlm.nih.gov/pubmed/32300657
http://dx.doi.org/10.1126/sciadv.aaz4322
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