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Nanofluid preparation, stability and performance for CO2 absorption and desorption enhancement: A review

Tavakoli, A ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1016/j.jenvman.2022.114955
  3. Publisher: Academic Press , 2022
  4. Abstract:
  5. In recent years, the importance of capturing CO2 has increased due to the necessity of minimizing climate change and the detrimental effects of CO2 emissions from industrial processes. CO2 absorption, as one of the most mature carbon capture technologies, has been improved by introducing nanosized particles into liquid absorbents. Nanofluids have been the subject of interest in many studies recently due to their tremendous impact on absorption. This review comprehensively examines the CO2 absorption behavior for nanofluids through the investigation of different absorption systems. Potential mechanisms for improving the absorption/regeneration performance of nanoabsorbents as well as the synergistic effects of physicochemical properties of nanofluids, such as viscosity and density on CO2 capture behavior, are reviewed. Nanofluid enhancement factors in terms of absorption rate and capacity towards CO2 are also compiled. Mathematical models, which have been proposed for calculating mass transfer coefficient and mass diffusivity, are comprehensively outlined. The paper discusses conventional methods for nanofluid preparation affecting the physicochemical properties of nanofluids. Strategies for enhancing nanofluid stability, as well as approaches to examine their stability are discussed. Finally, nanoparticle concentration, types and size of them, and selection of the base liquid absorbent as the key factors influencing the CO2 removal process by nanofluids, are considered in this paper, as well. © 2022 Elsevier Ltd
  6. Keywords:
  7. Absorption ; CO2 capture ; Mass-transfer ; Nanofluid ; Nanoparticle ; Suspension stability ; Absorbent ; Solvent ; Carbon dioxide ; Carbon emission ; Climate change ; Concentration (composition) ; Desorption ; Mass transfer ; Atmospheric pressure ; Boundary layer ; Centrifugation ; Concentration (parameter) ; Density ; Diffusion ; Environmental impact ; Grazing ; Hydrodynamics ; Liquid ; Magnetic field ; Molecular diffusivity ; Molecular stability ; Motion ; Particle size ; PH ; Photography ; Photon correlation spectroscopy ; physical chemistry ; Physiotherapy ; Review ; Scanning electron microscopy ; Sedimentation ; Surface property ; Temperature ; Thermal conductivity ; Titrimetry ; Transmission electron microscopy ; Turbidimetry ; Ultraviolet visible spectroscopy ; Viscosity ; Waste component removal ; Zeta potential ; Chemistry ; Carbon ; Nanoparticles ; Viscosity
  8. Source: Journal of Environmental Management ; Volume 313 , 2022 ; 03014797 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S030147972200528X