Affiliation:
1. Energy Business Unit Commonwealth Scientific Industrial Research Organisation (CSIRO) Kensington Western Australia 6151 Australia
2. Department of Chemical Engineering The University of Western Australia 35 Stirling Highway Crawley Western Australia 6009 Australia
3. Mineral Resources Commonwealth Scientific Industrial Research Organisation (CSIRO) Waterford Western Australia 6152 Australia
Abstract
AbstractConventional usage of tetraethylenepentamine (TEPA) via being supported on porous solid materials for carbon capture is susceptible to oxidative degradation during regeneration cycles. This study reports a novel method to synthesize a TEPA based solid polymer for efficient CO2 removal via direct air capture (DAC). The polymer was obtained through epoxy‐amine crosslinking reaction, leading to the transformation of liquid TEPA to a self‐supported solid polymer. The synthesis was conducted under ambient conditions via a one‐pot process with no waste products, which is aligned with green synthesis. The performance of the solid amine was evaluated in DAC under realistic conditions and compared with TEPA supported on SiO2 and zeolite 13X prepared through the conventional method. The solid TEPA amine exhibited a high CO2 uptake of 6.2 wt.% comparable to the conventional counterparts. More importantly, the solid TEPA amine demonstrated high resistance to oxidation during the accelerated ageing process at 80 °C in air for 24 h, whereas the two supported TEPA samples experienced severe degradation, with zeolite 13X supported TEPA incurring a reduction of 86.5 % in CO2 capturing capacity after the ageing. This work sheds light on the novel usage of TEPA as an efficient solid amine for practical DAC operation.
Reference68 articles.
1.
2. The Working Group on the Anthropocene: Summary of evidence and interim recommendations
3. The Anthropocene is functionally and stratigraphically distinct from the Holocene
4.
5. C. P. Arias N. Bellouin E. Coppola R. Jones G. Krinner J. Marotzke et al. Climate Change 2021 – The Physical Science Basis: Working Group I Contribution to the Sixth Assessment Report of the Intergovernmental Panel on Climate Change Cambridge University Press Cambridge 2023;