The enhancement of the physical absorption of gases in aqueous activated carbon slurries

Tinge, J.T.; Drinkenburg, A.A.H.

doi:10.1016/0009-2509(94)00468-7

Cited by 41 publications

(12 citation statements)

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“…In this way, the transfer of gas will be facilitated". This effect was later confirmed by others, [32][33][34] and is mostly influenced by the particle size and surface area of the suspended particles, which is in line with the observed difference for Au/TiO 2 (low BET surface area ∼40 m 2 g −1 ) and Au/C (high BET surface area ∼1000 m 2 g −1 ). 35 The potential effect of increased gas-liquid transfer by carbon was investigated in a third experiment, in which the Au/ TiO 2 catalysed oxidation was repeated, but with the addition of the same amount of activated carbon.…”

Section: Reaction Chemistry and Engineering Papersupporting

confidence: 85%

From batch to continuous: Au-catalysed oxidation of d-galacturonic acid in a packed bed plug flow reactor under alkaline conditions

et al. 2018

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Section: Reaction Chemistry and Engineering Papersupporting

confidence: 85%

From batch to continuous: Au-catalysed oxidation of d-galacturonic acid in a packed bed plug flow reactor under alkaline conditions

et al. 2018

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“…In the work of Holstvoogd et al, 1988, it was clearly demonstrated that the particle position is one of the major parameters in determining mass transfer enhancement. This was confirmed experimentally by Tinge and Drinkenburg, 1995, who added very fine panicles to a slurry already consisting of larger particles, and found that the enhancement of gas absorption is similar to the enhancement of the gas absorption rate due to the addition of only the same amount of fine particles to a clear liquid. 23, No.…”

Section: Role Of Dispersed Phase In Gas-liquid Reactions: a Reviewmentioning

confidence: 61%

Role of Dispersed Phase in Gas-Liquid Reactions: A Review

Kaur¹,

Ramakrishna²,

Nigam³

2007

Reviews in Chemical Engineering

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Gas-liquid-liquid reactions have an important place in the engineering and chemical fields. A review on gas-liquid-liquid reactions is presented, considering the effect of addition of an immiscible (mainly organic) liquid on gas-liquid system. The effect of the presence of immiscible liquid on kt» and a has been reviewed. The dispersed phase has a significant role in mass transfer enhancement. The volumetric mass transfer coefficient, k L a, though initially decreases, it increases with higher loading of the dispersed phase. This behavior has been explained taking into account the nature of dispersed phase and the spreading coefficient, S. The spreading coefficient, bubble and droplet size and turbulence induced by the presence of dispersed phase are •the important parameters in the enhancement of the mass transfer. The enhancement in the mass transfer can be explained by four types of mechanisms, namely: (1) Shuttle effect or grazing mechanism; (2) Bubble covering mechanism; (3) The permeability effect and (4) The hydrodynamic effect. Further, for describing the phenomenon of gas absorption in the presence of dispersed phase, two different types of models, namely homogeneous and heterogeneous models, were reported in the literature. + IICT Communication No.: 070204 247 Brought to you by |

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“…It is proven that the process of gas-liquid mass transfer can be greatly enhanced in the presence of fi ne particles, especially the nanometer size particles. [12][13][14] Krishnamurthy et al . 15 fi rst visualized dye diff usion in nanoparticle suspensions and observed that dye diff uses faster in nanoparticle suspensions compared with that in pure water.…”

Section: Introductionmentioning

confidence: 99%

Wetted‐wall column study on CO₂ absorption kinetics enhancement by additive of nanoparticles

Wang

Yü

et al. 2015

Greenhouse Gases

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Nanoparticles suspended in solutions are considered to have the potential to enhance gas‐liquid mass transfer and have been studied for gas separation. In order to reveal the mechanisms of kinetics enhancement, the diffusion and reaction process should be carefully examined. In this paper, CO2 absorption kinetics of amine‐based solutions with additive of SiO2 and Al2O3 nanoparticles were investigated by wetted‐wall column experiments. Measurements at different conditions, including solid loading, pressure, and solvent flow rate, show a significant enhancement on CO2 absorption kinetics. The experiment and model analysis indicate that the micro convective motion induced by particle Brownian movement plays a primary role in mass transfer enhancement. Three solutions, MEA, MDEA, and PZ which have different kinetics were selected to study the impact of nanoparticles on absorption kinetics of solutions with different reaction rate. It is interesting to find that the increased ratio of absorption kinetics by nanoparticle follows the same order with increased solvent reaction rate with CO2, which is PZ > MEA > MDEA. The wetted‐wall kinetic model indicates that a diffusion controlled kinetics for PZ solution could result in much more significant kinetic enhancement with additives of nanoparticles. By operation conditions optimization, the liquid side mass transfer rate of MEA solution can be increased over 15%.© 2015 Society of Chemical Industry and John Wiley & Sons, Ltd

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The enhancement of the physical absorption of gases in aqueous activated carbon slurries

Cited by 41 publications

References 18 publications

From batch to continuous: Au-catalysed oxidation of d-galacturonic acid in a packed bed plug flow reactor under alkaline conditions

From batch to continuous: Au-catalysed oxidation of d-galacturonic acid in a packed bed plug flow reactor under alkaline conditions

Role of Dispersed Phase in Gas-Liquid Reactions: A Review

Wetted‐wall column study on CO₂ absorption kinetics enhancement by additive of nanoparticles

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The enhancement of the physical absorption of gases in aqueous activated carbon slurries

Cited by 41 publications

References 18 publications

From batch to continuous: Au-catalysed oxidation of d-galacturonic acid in a packed bed plug flow reactor under alkaline conditions

From batch to continuous: Au-catalysed oxidation of d-galacturonic acid in a packed bed plug flow reactor under alkaline conditions

Role of Dispersed Phase in Gas-Liquid Reactions: A Review

Wetted‐wall column study on CO2 absorption kinetics enhancement by additive of nanoparticles

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Wetted‐wall column study on CO₂ absorption kinetics enhancement by additive of nanoparticles