CO2 absorption/regeneration enhancement in DI water with suspended nanoparticles for energy conversion application

Lee, Jong; Lee, Jae Won; Kang, Yong Tae

doi:10.1016/j.apenergy.2015.01.020

Cited by 77 publications

(38 citation statements)

References 37 publications

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“…Therefore, more bubbles are more easily generated and desorbed from the surface. This mechanism is supported by Lee et al [59], who studied the visualization of the CO 2 bubble generation when employing SiO 2 and Al 2 O 3 nanoparticles to deionized water. The Al 2 O 3 showed better bubble generation and desorption upon adding heat, in comparison to water and SiO 2 nanoparticles.…”

Section: Physical Enhancement Mechanism Of Nanoparticlesmentioning

confidence: 72%

“…The physical enhancement mechanisms by nanoparticles on solvent regeneration include activation energy, surface effect and thermal conductivity enhancement effect [57][58][59][60]. The activation energy effect was proposed by Lee et al [59] in 2015. Activation energy is the minimum energy that must be provided to result in a chemical reaction of a compound.…”

Section: Physical Enhancement Mechanism Of Nanoparticlesmentioning

confidence: 99%

“…Another aspect of nanoparticle stability is its morphology (shape and size) [104]. The instability of this aspect comes from its cluster size, as particles in colloidal solutions usually come into contact with each other, and clusters are formed due to the unstable particle collisions [59]. This alters the thermo-physical properties of nanoparticles for its application.…”

Section: Nanoparticle Selection Criteriamentioning

confidence: 99%

See 2 more Smart Citations

A Review on Enhancing Solvent Regeneration in CO2 Absorption Process Using Nanoparticles

Rozaiddin

Lau

2022

Sustainability

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The employment of nanoparticles in solvents is a promising method to reduce the energy consumption during solvent regeneration. Numerous experimental and theoretical studies have been conducted to investigate the remarkable enhancement of nanoparticles. Yet, there are limited reviews on the mechanistic role of nanoparticles in enhancing the solvent regeneration performance. This review addresses the recent development on the employment of various nanoparticles, which include metals oxides, zeolites and mesoporous silicas, to enhance the mass and heat transfer, which subsequently minimize the solvent regeneration energy. The enhancement mechanisms of the nanoparticles are elaborated based on their physical and chemical effects, with a comprehensive comparison on each nanoparticle along with its enhancement ratio. This review also provides the criteria for selecting or synthesizing nanoparticles that can provide a high regeneration enhancement ratio. Furthermore, the future research prospects for the employment of nanoparticles in solvent regeneration are also recommended.

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Section: Physical Enhancement Mechanism Of Nanoparticlesmentioning

confidence: 72%

Section: Physical Enhancement Mechanism Of Nanoparticlesmentioning

confidence: 99%

Section: Nanoparticle Selection Criteriamentioning

confidence: 99%

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A Review on Enhancing Solvent Regeneration in CO2 Absorption Process Using Nanoparticles

Rozaiddin

Lau

2022

Sustainability

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“…The enhancement in absorption performance with increasing in the nanofluid concentration especially at higher liquid flow rate arises from the nanoparticles' Brownian motion . The presence of TiO 2 nanoparticles cause the bubbles crash and produce smaller bubbles, which enhances the mass transfer during the bubble absorption process . However, it is expected that if the concentration of nanofluid increases over a critical value, it will lead to the reduction of the Brownian motion, as the inter‐particle interaction hinders its motion.…”

Section: Resultsmentioning

confidence: 99%

Detailed performance model of carbon dioxide absorption utilizing titanium dioxide nanoparticles in a wetted wall column

Rashidi

Sohrabi

2019

Env Prog and Sustain Energy

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Physical absorption of carbon dioxide was investigated in a wetted wall column (WWC) using a nanofluid containing titanium dioxide. Central composite response surface design (CCD) has been applied to give useful information about the main and interaction effects of the operational parameters. A quadratic mathematical model has been derived to clearly give a proper model for obtained experimental observations. The model adequacy has been analyzed by the use of analysis of variance (ANOVA), R‐squared coefficients, and lack of fit tests. The predicted values were found to be in good agreement with the general trend of experimental results. The interactive effects of the three effective absorption variables, namely temperature, liquid flow rate, and nanofluid concentration have been evaluated at five levels on the liquid mass transfer coefficient. Measurements of liquid‐side mass transfer coefficient elucidated that the absorption temperature of 25°C, the nanofluid flow rate of 299.88 mL/min, and the nanofluid concentration of 1.0%w, considerably enhances the absorption of carbon dioxide over twice. © 2019 American Institute of Chemical Engineers Environ Prog, 38: e13211, 2019

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“…At normal pressure, the rate of chemical absorption is higher than physical absorption. However, there are several drawbacks; for instance, a large amount of energy is consumed during the regeneration process due to the strong chemical bonds between absorbents and CO 2 7 . By contrast, the energy consumed during the regeneration of physical absorbents is lower than that used for the regeneration of chemical absorbents 8 .…”

Section: Introductionmentioning

confidence: 99%

CFD simulation of CO2 absorption by water-based TiO2 nanoparticles in a high pressure stirred vessel

Ghasem

2021

Sci Rep

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This work presents the modeling and simulation of CO2 capture by a water-based Titanium dioxide (TiO2) solid nanoparticle in a stirred high-pressure vessel at a constant temperature. Photocatalytic material such as TiO2 has excellent properties, namely it is nontoxic, inexpensive, and non-polluting. CFD model equations are developed and solved using COMSOL software package. The effect of the concentration of a solid nanoparticle in a water-based TiO2 solution, the size of TiO2 nanoparticles and the rate of mixing on the CO2 absorption rate is investigated. A 2D mathematical model considers both shuttle and micro-convention mechanisms. Results reveal that the best TiO2 concentration range is between 0.5 and 1 kg/m3 and that a particle size of 10 nm is more efficient than higher particle sizes. A moderate mixing rate maximizes the CO2 removal rate. The theoretical predictions are validated using lab experimental data and those in the available literature. Results confirm that the model calculations match with the experimental results. Accordingly, the model successfully predicts the experimental data and can be used for further studies.

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CO2 absorption/regeneration enhancement in DI water with suspended nanoparticles for energy conversion application

Cited by 77 publications

References 37 publications

A Review on Enhancing Solvent Regeneration in CO2 Absorption Process Using Nanoparticles

A Review on Enhancing Solvent Regeneration in CO2 Absorption Process Using Nanoparticles

Detailed performance model of carbon dioxide absorption utilizing titanium dioxide nanoparticles in a wetted wall column

CFD simulation of CO2 absorption by water-based TiO2 nanoparticles in a high pressure stirred vessel

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