Development of Novel Approaches to Rejuvenate Degraded PEI Adsorbents with Catalytic Hydrogenation

DOI

10.2991/978-94-6463-415-0_53How to use a DOI?

Keywords

Carbon Capture; Degraded PEI; Rejuvenation

Abstract

PEI immobilized solid adsorbents are highlighted to be used in carbon capture technology due to its high CO₂ selectivity, suitable adsorption temperature and tolerance of moisture. However, the oxidation and degradation of PEI are still a hard nut to crack, which is the main limitation of PEI absorbents application. Oxygen-containing functionalities formation, urea formation and amine group loss in result in the PEI carbon capture ability and CO₂ selectivity reduction. Effective measures that can be potentially used to rejuvenate the spent PEI adsorbents is of great importance to further improve both the economic and environmental performance of carbon capture technologies. However, little work has been conducted on how or if the degraded PEI can be effectively rejuvenated or converted to other value-added products. A new approach for PEI rejuvenation were proposed by catalytic hydrogenation, which improve the degraded PEI carbon capture ability to equal to that of the original PEI. After the catalytic hydro-treatment, the majority of degradation-derived carboxyl and amide groups were reduce to hydroxy and amine group, which increase adsorption active site of degraded PEI. But, the amine group loss lead to the heavily degraded PEI carbon capture ability just was improve to the 60% of the original PEI.

Copyright

© 2024 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Chulai Wang
AU  - Hangxin Xie
AU  - Yuan Sun
AU  - Li Lv
PY  - 2024
DA  - 2024/05/14
TI  - Development of Novel Approaches to Rejuvenate Degraded PEI Adsorbents with Catalytic Hydrogenation
BT  - Proceedings of the 2023 9th International Conference on Advances in Energy Resources and Environment Engineering (ICAESEE 2023)
PB  - Atlantis Press
SP  - 504
EP  - 513
SN  - 2589-4943
UR  - https://doi.org/10.2991/978-94-6463-415-0_53
DO  - 10.2991/978-94-6463-415-0_53
ID  - Wang2024
ER  -