No Cover Image

Journal article 535 views 68 downloads

Cross-Linking Amine-Rich Compounds into High Performing Selective CO2 Absorbents / Enrico Andreoli; Eoghan P. Dillon; Laurie Cullum; Lawrence B. Alemany; Andrew Barron

Scientific Reports, Volume: 4

Swansea University Authors: Enrico, Andreoli, Andrew, Barron

Check full text

DOI (Published version): 10.1038/srep07304

Abstract

Amine-based absorbents play a central role in CO2 sequestration and utilization. Amines react selectively with CO2, but a drawback is the unproductive weight of solvent or support in the absorbent. Efforts have focused on metal organic frameworks (MOFs) reaching extremely high CO2 capacity, but limi...

Full description

Published in: Scientific Reports
ISSN: 2045-2322
Published: 2014
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa21052
Tags: Add Tag
No Tags, Be the first to tag this record!
Abstract: Amine-based absorbents play a central role in CO2 sequestration and utilization. Amines react selectively with CO2, but a drawback is the unproductive weight of solvent or support in the absorbent. Efforts have focused on metal organic frameworks (MOFs) reaching extremely high CO2 capacity, but limited selectivity to N2 and CH4, and decreased uptake at higher temperatures. A desirable system would have selectivity (cf. amine) and high capacity (cf. MOF), but also increased adsorption at higher temperatures. Here, we demonstrate a proof-of-concept where polyethyleneimine (PEI) is converted to a high capacity and highly selective CO2 absorbent using buckminsterfullerene (C60) as a cross-linker. PEI-C60 (CO2 absorption of 0.14 g/g at 0.1 bar/90°C) is compared to one of the best MOFs, Mg-MOF-74 (0.06 g/g at 0.1 bar/90°C), and does not absorb any measurable amount of CH4 at 50 bar. Thus, PEI-C60 can perform better than MOFs in the sweetening of natural gas.
Item Description: This work is licensed under a Creative Commons Attribution 4.0 InternationalLicense. The images or other third party material in this article are included in thearticle’s Creative Commons license, unless indicated otherwise in the credit line; ifthe material is not included under the Creative Commons license, users will needto obtain permission fromthe license holder in order to reproduce thematerial. Toview a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
College: College of Engineering