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Deactivation Kinetics of Polyethylenimine-based Adsorbents Used for the Capture of Low Concentration CO(2)

[Image: see text] CO(2) emission is generally regarded as the major contributor to global climate change, and polyethylenimine (PEI)-based CO(2) adsorbents are promising materials for the capture of low concentration CO(2). This paper deals with the deactivation kinetics of PEI-based CO(2) adsorbent...

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Autores principales: Si, Wenting, Yang, Bin, Yu, Qingni, Lei, Lecheng, Zhu, Jingke
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2019
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6648483/
https://www.ncbi.nlm.nih.gov/pubmed/31460225
http://dx.doi.org/10.1021/acsomega.9b00792
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author Si, Wenting
Yang, Bin
Yu, Qingni
Lei, Lecheng
Zhu, Jingke
author_facet Si, Wenting
Yang, Bin
Yu, Qingni
Lei, Lecheng
Zhu, Jingke
author_sort Si, Wenting
collection PubMed
description [Image: see text] CO(2) emission is generally regarded as the major contributor to global climate change, and polyethylenimine (PEI)-based CO(2) adsorbents are promising materials for the capture of low concentration CO(2). This paper deals with the deactivation kinetics of PEI-based CO(2) adsorbents used for the capture of low concentration CO(2). EA and TG analyses demonstrated that thermal degradation and O(2)-induced deactivation of the adsorbents occurred simultaneously under air exposure conditions. It was found by N(2) exposure experiments at the temperature of 50–80 °C that the thermal degradation of PEI-based adsorbents followed a first-order reaction model with an activation energy of 80.98 kJ/mol and a pre-exponential factor of 6.055 × 10(8) (h(–1)). The parallel reaction model was employed to distinguish the O(2)-induced deactivation from the thermal degradation of the adsorbents through air exposure experiments within 50–80 °C. The O(2)-induced deactivation exhibited a second-order reaction with an activation energy of 74.47 kJ/mol and a pre-exponential factor of 6.321 × 10(6) (%(–1)·h(–1)). The results of simulating the overall deactivation of the adsorbents by the parallel reaction kinetic model were well consistent with those of the experiments, proving that the parallel reaction model was feasible for the description of the deactivation of PEI-based adsorbents.
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spelling pubmed-66484832019-08-27 Deactivation Kinetics of Polyethylenimine-based Adsorbents Used for the Capture of Low Concentration CO(2) Si, Wenting Yang, Bin Yu, Qingni Lei, Lecheng Zhu, Jingke ACS Omega [Image: see text] CO(2) emission is generally regarded as the major contributor to global climate change, and polyethylenimine (PEI)-based CO(2) adsorbents are promising materials for the capture of low concentration CO(2). This paper deals with the deactivation kinetics of PEI-based CO(2) adsorbents used for the capture of low concentration CO(2). EA and TG analyses demonstrated that thermal degradation and O(2)-induced deactivation of the adsorbents occurred simultaneously under air exposure conditions. It was found by N(2) exposure experiments at the temperature of 50–80 °C that the thermal degradation of PEI-based adsorbents followed a first-order reaction model with an activation energy of 80.98 kJ/mol and a pre-exponential factor of 6.055 × 10(8) (h(–1)). The parallel reaction model was employed to distinguish the O(2)-induced deactivation from the thermal degradation of the adsorbents through air exposure experiments within 50–80 °C. The O(2)-induced deactivation exhibited a second-order reaction with an activation energy of 74.47 kJ/mol and a pre-exponential factor of 6.321 × 10(6) (%(–1)·h(–1)). The results of simulating the overall deactivation of the adsorbents by the parallel reaction kinetic model were well consistent with those of the experiments, proving that the parallel reaction model was feasible for the description of the deactivation of PEI-based adsorbents. American Chemical Society 2019-06-27 /pmc/articles/PMC6648483/ /pubmed/31460225 http://dx.doi.org/10.1021/acsomega.9b00792 Text en Copyright © 2019 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Si, Wenting
Yang, Bin
Yu, Qingni
Lei, Lecheng
Zhu, Jingke
Deactivation Kinetics of Polyethylenimine-based Adsorbents Used for the Capture of Low Concentration CO(2)
title Deactivation Kinetics of Polyethylenimine-based Adsorbents Used for the Capture of Low Concentration CO(2)
title_full Deactivation Kinetics of Polyethylenimine-based Adsorbents Used for the Capture of Low Concentration CO(2)
title_fullStr Deactivation Kinetics of Polyethylenimine-based Adsorbents Used for the Capture of Low Concentration CO(2)
title_full_unstemmed Deactivation Kinetics of Polyethylenimine-based Adsorbents Used for the Capture of Low Concentration CO(2)
title_short Deactivation Kinetics of Polyethylenimine-based Adsorbents Used for the Capture of Low Concentration CO(2)
title_sort deactivation kinetics of polyethylenimine-based adsorbents used for the capture of low concentration co(2)
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6648483/
https://www.ncbi.nlm.nih.gov/pubmed/31460225
http://dx.doi.org/10.1021/acsomega.9b00792
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