Energy-efficiency analysis of industrial CO2 removal system using nanoabsorbents

Kim, Seonggon; Xu, Ronghuan; Lee, Wonhyeok; Lim, Hwan Suk; Kang, Yong Tae

doi:10.1016/j.jclepro.2020.125153

Cited by 13 publications

(5 citation statements)

References 40 publications

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“…This corresponds to 0.6% of the total electricity production in a power plant. Furthermore, in typical CO 2 capture applications reported in recent studies 3 , the energy consumption of 4.2 kJ/g is only partially reduced (i.e., 10-20%). However, the system proposed in this study produces electricity, which is highly feasible and signi cantly increases the energy e ciency.…”

Section: Industrial Applicationsmentioning

confidence: 94%

“…Although the CO 2 selectivity of a physical absorbent is low, CO 2 separation is possible because the partial pressure of CO 2 in the ue gas is high, and the energy required for regeneration is small (when the temperature approaches the boiling point or the pressure is lowered, CO 2 is separated according to Henry's law). The energy consumed by the physical absorption process using MeOH as the working uid was 1.88 MJ/kg-CO 2 3 . The postcombustion capture process removes CO 2 after the gas is allowed to expand in the turbine.…”

Section: Introductionmentioning

confidence: 99%

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CO2 capture-driven thermal and electric energy harvesting using amine-functionalized solvents with a poly(amidoamine) impregnated membrane

Kim¹,

Kim²,

Kang³

2022

Preprint

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The energy consumed for CO2 capture in processes that capture, store, and utilize carbon frequently approaches 80% of the total energy consumed, and its reduction is a major area of focus. Herein, a system that captures CO2 from flue gas to produce electricity is proposed. The exothermic reaction heat of amine-CO2 in the point-source CO2 capture process is harvested and converted into electricity using a thermoelectric (TE) device. The reaction heat of synthesized amine-functionalized mixtures (TEPA@SBA/MEA+PZ) is 52% higher compared with that obtained from the primary amine absorbent. The flue gas channel and solvent reservoir are separated using a membrane composed of tetraethylenepentamine-impregnated poly (ethylene glycol) dimethacrylate that selectively permeates CO2, to minimize heat loss due to mass transfer. The CO2 working capacity of TEPA@SBA/MEA+PZ is 6.6 mmol/g, which is defined as the capture capacity under steady-state conditions of 15 mol% CO2 and 85 mol% N2. Simultaneously, electricity can be harvested at a rate of 7.5 kJ/kg with a TE device composed of Bi2Te3. When put to industrial use, the proposed system can reduce the CO2 emission of power plants from 0.8 ton/MWh to 0.25 ton/MWh, while simultaneously generating an additional 0.6% of the total electricity production.

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Section: Industrial Applicationsmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

CO2 capture-driven thermal and electric energy harvesting using amine-functionalized solvents with a poly(amidoamine) impregnated membrane

Kim¹,

Kim²,

Kang³

2022

Preprint

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“…[12][13][14] Recent development focuses on the nanofluid, which enhances CO 2 absorption from the perspective of nanoscale. [15][16][17] These results show that the nanoscale improves the mass transfer and energy transfer, [18][19][20] which inspires us to improve the performance of the solvent by further adjusting its scale. The single atom catalyst, as a typical intensification material, has been used in various chemical processes.…”

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confidence: 87%

Liquid metal with solvents for CO₂ capture

Zhang

Zhou

et al. 2021

Greenhouse Gases

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Carbon dioxide (CO 2 ) capture is an essential method for emission control. In CO 2 capture, although with the promising advantage of industrial application, chemical absorption meets the challenge of substantial energy consumption. Thus, an advanced solvent with liquid metal GaInSn/PANI/TEMPO has been first developed to reduce the energy consumption. The intensified thermoelectric effect between GaInSn/PANI/TEMPO has the potential to enhance the CO 2 desorption. Density functional theory (DFT) model and spherical mass transfer and energy transfer model in the nanoscale are developed to study the mass and energy transfer in CO 2 and GaInSn/PANI/TEMPO. The CO 2 fraction, electron density, and velocity in the nanodomain are studied. The symmetrical electron density zone is identified for the thermoelectric effect. The mass transfer coefficient is increased by twofolds. The thermoelectric conversion amount reaches 32.6-44.8% and the energy consumption is reduced to 1.07 GJ t −1 . The CO 2 desorption is finally proven to occur at temperature below 339 K.

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“…Enhancements of 4.6% and 5.5% were obtained for Al 2 O 3 and SiO 2 particles in mass transfer (these authors found enhancements of 21% and 11% in the thermal conductivity for the same particles at a concentration of 1 vol %. 25 ). From the studies of Komati and Suresh, 4 it would be expected that the enhancements would be smaller with higher base-case mass-transfer coefficient (without nanoparticles) because higher mass-transfer coefficients would correspond to smaller penetration depths.…”

Section: A Short Review Of the Literaturementioning

confidence: 99%

“…In a recent study by Kim et al, experiments were performed to study CO 2 absorption in methanol in the presence of Al 2 O 3 and SiO 2 nanoparticles. Enhancements of 4.6% and 5.5% were obtained for Al 2 O 3 and SiO 2 particles in mass transfer (these authors found enhancements of 21% and 11% in the thermal conductivity for the same particles at a concentration of 1 vol % …”

Section: A Short Review Of the Literaturementioning

confidence: 99%

Absorption of CO₂ in Nanofluids: Influence of the Material Density of Nanoparticles and a Correlating Principle

Ramprasad,

Suresh

2023

Ind. Eng. Chem. Res.

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Enhancements in mass transfer into conventional media in the presence of nanosized particles have been demonstrated in recent decades and show an effect of the particle size (relative to the penetration depth of the solute) and particle (volumetric) holdup. Limited information exists on the effect of the density of the nanomaterial used and suggests that it could be an important parameter as well. In the present work, we have used nanofluids with a variety of particles of different densities and similar sizes, in the absorption of CO 2 in physical absorption (water) and reactive absorption [methyldiethanolamine (MDEA) and monoethanolamine (MEA) solutions], in a capillary tube apparatus. Enhancements are higher in physical absorption than in reactive absorption. A strong dependence of the enhancement on the material density of the nanoparticles is observed, with gold particles giving a 10-fold enhancement in mass transfer coefficients in physical absorption. A semiempirical theory proposed earlier has been revisited, with additional data from this work combined with the earlier body of data, and a general correlative theory to capture the effects of particles has been proposed.

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Energy-efficiency analysis of industrial CO2 removal system using nanoabsorbents

Cited by 13 publications

References 40 publications

CO2 capture-driven thermal and electric energy harvesting using amine-functionalized solvents with a poly(amidoamine) impregnated membrane

CO2 capture-driven thermal and electric energy harvesting using amine-functionalized solvents with a poly(amidoamine) impregnated membrane

Liquid metal with solvents for CO₂ capture

Absorption of CO₂ in Nanofluids: Influence of the Material Density of Nanoparticles and a Correlating Principle

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Energy-efficiency analysis of industrial CO2 removal system using nanoabsorbents

Cited by 13 publications

References 40 publications

CO2 capture-driven thermal and electric energy harvesting using amine-functionalized solvents with a poly(amidoamine) impregnated membrane

CO2 capture-driven thermal and electric energy harvesting using amine-functionalized solvents with a poly(amidoamine) impregnated membrane

Liquid metal with solvents for CO2 capture

Absorption of CO2 in Nanofluids: Influence of the Material Density of Nanoparticles and a Correlating Principle

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Product

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Liquid metal with solvents for CO₂ capture

Absorption of CO₂ in Nanofluids: Influence of the Material Density of Nanoparticles and a Correlating Principle