Author, as appears in the article.: Yousefe, Mohammad; Ursano, Bruna; Puga, Alberto; Reina, Jose Antonio
Department: Enginyeria Química Química Analítica i Química Orgànica
URV's Author/s: Puga Vaca, Alberto / Reina Lozano, José Antonio / Yousefe, Mohammad
Keywords: Silicon dioxide Regeneration energy Kinetics Ionic liquids Climate change Carbon-dioxide capture Carbon dioxide capture Carbon dioxide Amines Adsorption Absorption water temperature regeneration energy performance kinetics ionic liquids climate change chemisorption carbon dioxide capture adsorbents acetate absorption
Abstract: Accumulation of anthropogenic CO2 is undoubtedly the major cause of global warming. In addition to reducing emissions, minimising the threatening effects of climate change in the near future might also require the capture of enormous amounts of CO2 from point sources or from the atmosphere. In this regard, the development of novel affordable and energetically attainable capture technologies is greatly needed. In this work, we report rapid and greatly facilitated CO2 desorption for amine-free carboxylate ionic liquid hydrates as compared to a benchmark amine-based sorbent. Complete regeneration was achieved at moderate temperature (60 °C) over short capture-release cycles using model flue gas on a silica-supported tetrabutylphosphonium acetate ionic liquid hydrate (IL/SiO2), whereas the polyethyleneimine counterpart (PEI/SiO2) only recovered half its capacity after the first cycle in a rather sluggish release process under the same conditions. The IL/SiO2 sorbent achieved a slightly superior working CO2 capacity than PEI/SiO2. The easier regeneration of carboxylate ionic liquid hydrates, which behave as chemical CO2 sorbents leading to bicarbonate in a 1:1 stoichiometry, is due to their relatively low sorption enthalpies (≈40 kJ mol-1). The faster and more efficient desorption from IL/SiO2 fits a first-order kinetic model (k = 0.73 min-1), whereas a more complex process was observed for PEI/SiO2 (pseudo-first order initially, k = 0.11 min-1, pseudo-zero order at later stages). The remarkably low regeneration temperature, the absence of amines and the non-volatility of the IL sorbent are favourable assets to minimise gaseous stream contamination. Importantly, regeneration heats -a crucial parameter for practical application- are advantageous for IL/SiO2 (4.3 kJ g (CO2)-1) vs. PEI/SiO2, and fall within the range of typical amine sorbents indicating a remarkable performance at this proof-of-concept stage. Further structural design will enhance the viability of amine-free ionic liquid hydrates for carbon capture technologies.Copyright © 2023 The Authors. Published by Elsevier Ltd.. All rights reserved.
Thematic Areas: Zootecnia / recursos pesqueiros Waste management and disposal Saúde coletiva Química Psicología Planejamento urbano e regional / demografia Medicine (miscellaneous) Medicina veterinaria Medicina ii Medicina i Materiais Matemática / probabilidade e estatística Management, monitoring, policy and law Interdisciplinar Geografía Geociências General medicine Farmacia Environmental sciences Environmental engineering Ensino Engenharias iii Engenharias ii Engenharias i Ciências biológicas iii Ciências biológicas ii Ciências biológicas i Ciências ambientais Ciências agrárias i Ciência de alimentos Ciência da computação Biotecnología Biodiversidade Astronomia / física Arquitetura e urbanismo Administração pública e de empresas, ciências contábeis e turismo
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: mohammad.yousefe@urv.cat alberto.puga@urv.cat joseantonio.reina@urv.cat
Author identifier: 0000-0003-4201-2635 0000-0002-9245-4135
Record's date: 2024-10-26
Papper version: info:eu-repo/semantics/publishedVersion
Link to the original source: https://www.sciencedirect.com/science/article/pii/S0301479723002578
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Journal Of Environmental Management. 334 117469-117469
APA: Yousefe, Mohammad; Ursano, Bruna; Puga, Alberto; Reina, Jose Antonio (2023). Readily regenerable amine-free CO2 sorbent based on a solid-supported carboxylate ionic liquid. Journal Of Environmental Management, 334(), 117469-117469. DOI: 10.1016/j.jenvman.2023.117469
Article's DOI: 10.1016/j.jenvman.2023.117469
Entity: Universitat Rovira i Virgili
Journal publication year: 2023
Publication Type: Journal Publications
Repositori URV