Journal ArticleDOI
Gas absorption enhancement in hollow fiber membrane contactors using nanofluids: Modeling and simulation
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In this paper, a comprehensive 2D mathematical model has been developed to simulate process intensification of carbon dioxide absorption in the presence of nanoparticles in hollow fiber membrane contactors (HFMCs) considering Brownian motion and Grazing effect as dominant phenomena of mass transfer enhancement in nanofluids.Abstract:
In this article, a comprehensive 2D mathematical model has been developed to simulate process intensification of carbon dioxide absorption in the presence of nanoparticles in hollow fiber membrane contactors (HFMCs) The influences of nanoparticle were taken into account considering Brownian motion and Grazing effect as dominant phenomena of mass-transfer enhancement in nanofluids The obtained simulation results were validated against experimental data reported in the literature and excellent agreement was obtained It was found that by adding 005 wt % silica nanoparticles, the absorption rate could be enhanced by 16%, while the corresponding value is 32% for CNT nanoparticles High adsorption and hydrophobicity of CNT nanoparticles relative to silica nanoparticles lead to better performance of gas absorption processes An optimum value for nanoparticle concentration was found in which the gas absorption rate could be maximized This value for silica and CNT nanoparticles was 003 wt % Finally, it was found that using nanoparticles with appropriate concentration can enhance HFMCs performance and intensify the gas absorption processesread more
Citations
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Progress in enhancement of CO2 absorption by nanofluids: A mini review of mechanisms and current status
TL;DR: A comprehensive literature review on CO2 absorption enhancement by nanofluids is presented in this paper, which covers the preparation methods, enhancement mechanisms, and the enhancement factors of the gas-liquid system.
Journal ArticleDOI
Carbon dioxide capture using liquid absorption methods: a review
TL;DR: In this paper, the authors reviewed the 2015-2020 findings on CO2 capture using liquid absorption methods and discussed absorption performance, absorption mechanism, enhancement pathways and challenges, and added nanoparticles to solvents could improve CO2 absorption performance and reduce energy requirement.
Journal ArticleDOI
CO2 absorption enhancement by water-based nanofluids of CNT and SiO2 using hollow-fiber membrane contactor
TL;DR: In this article, a 2D mathematical model was developed by considering molecular diffusion in radial and axial directions as well as non-wetting condition for CO2 absorption in hollow fiber membrane contactor.
Journal ArticleDOI
Review of liquid nano-absorbents for enhanced CO2 capture
TL;DR: This review addresses two key questions for these two state-of-the-art nanomaterials: how are the physical and chemical properties of the prepared liquid nano-absorbents transformed relative to those of the base fluids?
Journal ArticleDOI
CFD modeling of CO2 capture by water-based nanofluids using hollow fiber membrane contactor
TL;DR: In this paper, a two-dimensional (2D) model was developed for CO2 removal from a gas mixture using a hollow fiber membrane contactor, where carbon nanotube (CNT) nanoparticles were used as absorbents.
References
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Book
Diffusion: Mass Transfer in Fluid Systems
TL;DR: An overview of diffusion and separation processes brings unsurpassed, engaging clarity to this complex topic as mentioned in this paper, which is a key part of the undergraduate chemical engineering curriculum and at the core of understanding chemical purification and reaction engineering.
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Compilation of Henry's law constants (version 4.0) for water as solvent
TL;DR: According to Henry's law, the equilibrium ratio between the abundances in the gas phase and in the aqueous phase is constant for a dilute solution as discussed by the authors, and a compilation of 17 350 values of Henry's Law constants for 4632 species, collected from 689 references is available at http://wwwhenrys-law.org
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Experimental investigation into convective heat transfer of nanofluids at the entrance region under laminar flow conditions
Dongsheng Wen,Yulong Ding +1 more
TL;DR: In this article, an experimental work on the convective heat transfer of nanofluids, made of γ-Al2O3 nanoparticles and de-ionized water, flowing through a copper tube in the laminar flow regime was conducted.
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Viscous flow relative to arrays of cylinders
TL;DR: In this paper, the free-surface model was extended to the case of flow relative to cylinders and shown to be in good agreement with existing data on beds of fibers of various types and flow through bundles of heat-exchanger tubes.