Enhancement of oxygen mass transfer rate in the presence of nanosized particles

Nagy, Endre; Feczkó, Tivadar; Koroknai, B.

doi:10.1016/j.ces.2007.08.064

Cited by 146 publications

(69 citation statements)

References 27 publications

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“…3a which has multiple layers of particles and only a row of particles perpendicular to the gasliquid interface are considered. With this assumption, and similar to the analysis of Nagy et al [26] method, the computational domain can be chosen as shown in Fig. 3b.…”

Section: Theoretical Modelingmentioning

confidence: 99%

“…3b. According to Nagy et al [26], the distance, L, between the first particles and the gas-liquid interface can vary between 0 and Dx, where Dx is the distance between adjacent particle layers which can be determined by Dx ¼ dð1=e 1=3 À 1Þ, where e is the nanoparticle volume fraction. In these simulations, L was chosen as Dx/2 and the values of d x , d y and d z were all equal to Dx + d. The following assumptions were also used in the modeling:…”

Section: Theoretical Modelingmentioning

confidence: 99%

“…However, most of these models were based on micro particles with few numerical studies based on nanoparticles. Nagy et al [26] proposed a one-dimensional heterogeneous model and a one-dimensional pseudo-homogeneous model to study the effect of nanoparticles on the gas absorption. Recently, Sheikholeslami et al [27][28][29] used advanced simulation methods to study nanofluid flow and heat transfer, which were reference for studying mass transfer.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of nanoparticles on oxygen absorption enhancement during sulfite forced oxidation

Jiang

Zhao²,

Cao³

et al. 2015

International Journal of Heat and Mass Transfer

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Section: Theoretical Modelingmentioning

confidence: 99%

Section: Theoretical Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of nanoparticles on oxygen absorption enhancement during sulfite forced oxidation

Jiang

Zhao²,

Cao³

et al. 2015

International Journal of Heat and Mass Transfer

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“…The addition of a water-immiscible phase, in which oxygen has a higher solubility, e.g. oxygen vectors (hydrocarbons or fluorocarbons) [16,18] or magnetic nanoparticles [27,31], has been proposed by several authors as an alternative means of improving oxygen transfer rate, without increasing the energy consumption for mixing or aeration.…”

Section: P Agglomerans Pbc-1 Production In Stirred Bioreactor With Cmentioning

confidence: 99%

Carob pulp as raw material for production of the biocontrol agent P. agglomerans PBC-1

Manso

Nunes

Raposo

et al. 2010

J Ind Microbiol Biotechnol

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Large-scale production has been the major obstacle to the success of many biopesticides. The spreading of microbial biocontrol agents against postharvest disease, as a safe and environmentally friendly alternative to synthetic fungicides, is quite dependent on their industrial mass production from low-cost raw materials. Considerable interest has been shown in using agricultural waste products and by-products from food industry as nitrogen and carbon sources. In this work, carob pulp aqueous extracts were used as carbon source in the production of the biocontrol agent Pantoea agglomerans PBC-1. Optimal sugar extraction was achieved at a solid/liquid ratio of 1:10 (w/v), at 25°C, for 1 h. Batch experiments were performed in shake flasks, at different concentrations and in stirred reactors at two initial inoculums concentrations, 10(6) and 10(7) cfu ml(-1). The initial sugar concentration of 5 g l(-1) allowed rapid growth (0.16 h(-1)) and high biomass productivity (0.28 g l(-1) h(-1)) and was chosen as the value for use in stirred reactor experiments. After 22 and 32 h of fermentation the viable population reached was 3.2 × 10(9) and 6.2 × 10(9) cfu ml(-1) in the fermenter inoculated at 10(6) cfu ml(-1) and 2.7 × 10(9) and 6.7 × 10(9) cfu ml(-1) in the bioreactor inoculated at 10(7) cfu ml(-1). A 78% reduction of the pathogen incidence was achieved with PBC-1 at 1 × 10(8) cfu ml(-1), grown in medium with carob extracts, on artificially wounded apples stored after 7 days at 25°C against P. expansum.

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“…18 In the field of mass transfer in nanofluids, there are a few researches dealt with mass diffusion in nanofluids 10,12,[19][20][21][22][23][24][25] and more researches investigated the influence of nanoparticles on convective mass transfer. 13,15,16,[26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42][43][44] Nevertheless, most researches on convective mass transfer in nanofluids are related to the gas absorption processes [26][27][28][29][30][31][32][33][34][35] and there have been limited attempts to use nanofluids in other popular separation processes such as liquid-liquid extraction. 13,[37][38][39][40][41]<...>…”

Section: Introductionmentioning

confidence: 99%

Mass transfer into/from nanofluid drops in a spray liquid‐liquid extraction column

Ashrafmansouri

Esfahany

2015

AIChE Journal

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The performance of a spray liquid-liquid extraction column at two mass-transfer directions was experimentally studied in the presence of silica nanoparticles. Toluene-based nanofluid drops containing 0.0005-0.01 vol % silica nanoparticles were dispersed in aqueous phase and acetic acid (AA) transfer between phases was investigated. The experiments were performed at fixed volumetric flow rates of dispersed and continuous phases. Maximum enhancement of 47.4% and 107.5% in overall mass-transfer coefficient, respectively, for mass-transfer direction of dispersed to continuous phase and vice versa were achieved for drops with 0.001 vol % silica nanoparticles. These enhancements can be referred to Brownian motion of nanoparticles and induced microconvection. The results showed that nanoparticles are more effective in augmenting AA transfer from continuous to dispersed phase. Probable reason is that smaller diameter and lower internal turbulence of drops in this transfer direction increase dispersed phase resistance potential to be manipulated by Brownian motion of nanoparticles.

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Enhancement of oxygen mass transfer rate in the presence of nanosized particles

Cited by 146 publications

References 27 publications

Effect of nanoparticles on oxygen absorption enhancement during sulfite forced oxidation

Effect of nanoparticles on oxygen absorption enhancement during sulfite forced oxidation

Carob pulp as raw material for production of the biocontrol agent P. agglomerans PBC-1

Mass transfer into/from nanofluid drops in a spray liquid‐liquid extraction column

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