Measurements of hydrogen—edible oil interfacial area using a homogeneous Ziegler—Natta catalyst in an agitated reactor

Ganguli, Keshab L.; Berg, Henk J. van den

doi:10.1016/0300-9467(78)85055-2

Cited by 13 publications

(6 citation statements)

References 3 publications

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“…H and n 1 are the parameters optimized by Fillion and Morsi (2000). In the present work, the authors used data for diffusivity coefficients from the literature (Andersson et al, 1974, Andersson and Berglin, 1982, Ganguli and Berg, 1978, Gut et al, 1979, but more accurate viscosity values could be obtained with the developed model. Indeed, this viscosity model was optimized for the same type of oils used for the respective diffusivity measurements, by taking complementary experimental data for the fitting (Gupta et al, 2007, Ganguli and Berg, 1978, Hasenhuettl, 2000.…”

Section: Mathematical Modelingmentioning

confidence: 99%

Accurate hydrogenated vegetable oil viscosity predictions for monolith reactor simulations

Albrand

Julcour-Lebigue²,

Gerbaud³

et al. 2020

Chemical Engineering Science

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h i g h l i g h t s Contribution group model to predict viscosity of partially hydrogenated edible oils. CFD simulations of a three-phase catalytic monolith reactor with viscosity change. Investigation of two-way coupling between hydrodynamics, transport and reaction. Strong limitations by mass transfer of fatty acids highlighted. Reactor performances greatly impacted by the evolution of viscosity and diffusivity.

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Section: Mathematical Modelingmentioning

confidence: 99%

Accurate hydrogenated vegetable oil viscosity predictions for monolith reactor simulations

Albrand

Julcour-Lebigue²,

Gerbaud³

et al. 2020

Chemical Engineering Science

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“…Andersson et al 17 measured the diffusivity of hydrogen in cottonseed oil and concluded that the diffusivity does not follow the Stockes-Einstein relation. In this study, the equation proposed by Wilke and Chang 23 was modified using literature diffusivity data 7,14,17,19 to obtain Φ and n as follows, where Φ and n were found to be 3.8 and 0.6, respectively. V A is the molar volume of the diffusing gas at its normal boiling point, 24 which is 0.0347 for N 2 and 0.0143 for H 2 .…”

Section: Physico-chemical Properties Of the Systems Usedmentioning

confidence: 99%

“…Moreover, Albright, 5 Bern et al, 6 Marangonzis et al 7 and Chen et al 8 reported that mass transfer is the rate-limiting step in most of the commercial reactors. As can be seen in Table 1, the majority of the authors measured the volumetric mass-transfer coefficient, k L a, by recording of the rate of change of the iodine value, 6,[8][9][10] by a chemical method, 7,[11][12][13][14] and by a physical method using a hydrogen probe. 15 Bern et al 6 as well as Andersson and Berglin 15 proposed correlations for hydrogen in rapeseed oil that relate k L a to the gas velocity, impeller diameter, mixing speed, and liquid volume.…”

Section: Introductionmentioning

confidence: 99%

“…Bern et al 9 reported that the solubility of hydrogen in rapeseed oil from 0.03 to 1 MPa and 413-473 K obeys Henry's law and follows an Arrhenius-type equation. Ganguli and van der Berg 14 reported some solubility values at 0.1 MPa and at temperatures less than 363 K for the hydrogen-soybean oil system. Though some solubility data for hydrogen solubility in vegetable oil are available, there is no correlation for hydrogen in soybean oil under industrial conditions.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Gas−Liquid Mass-Transfer and Hydrodynamic Parameters in a Soybean Oil Hydrogenation Process under Industrial Conditions

and

Morsi

2000

Ind. Eng. Chem. Res.

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This paper presents some experimental data on the volumetric gas-liquid mass-transfer coefficient (k L a), liquid-side mass-transfer coefficient (k L ), gas-liquid interfacial area (a), bubble Sauter mean diameter (d S ), gas holdup ( G ), and solubility (C*) for N 2 and H 2 in soybean oil obtained in a 4 × 10 -3 m 3 agitated reactor operating under typical industrial conditions as a surface aeration reactor (SAR) and a gas-inducing reactor (GIR). The data were measured in wide ranges of temperature (373-473 K), pressure (0.1-0.5 MPa), mixing speed (10-23.3 Hz), and liquid height (0.171-0.268 m). The central composite statistical design approach was used to distribute the experiments and correlate the k L a and d S results. The solubility values for both gases were found to increase with pressure and temperature and to obey Henry's law. The effect of temperature on Henry's law constants was modeled using an Arrhenius-type equation. The mass-transfer and hydrodynamic parameters were significantly affected by the mixing speed and liquid height. At high mixing speeds and low liquid levels, bubbles coalescence was found to control the behavior of the gas-liquid interfacial area for H 2 in the GIR, whereas the gas holdup dictated the behavior of a GIR at high mixing speeds and high liquid heights. For both gases, k L a and k L in the SAR increased with temperature. k L a, a GIR , d S , and G in the GIR decreased with temperature because of the decrease of the induced gas bubbles in the liquid. Under the operating conditions investigated, the mass-transfer and hydrodynamic parameters for both gases in soybean oil were independent of pressure. Also, under similar operating conditions, hydrogen mass-transfer and hydrodynamic parameters in the oil were higher than those of nitrogen because of its higher diffusivity and lower momentum.

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“…For fatty acid methyl ester hydrogenation over Pd/C catalyst, Tsuto et al46 could verify the observed shunt reactions by incorporating intraparticle hydrogen diffusion limitation, although not very accurately because of the insensitivity of the curves for the value of D

_{italice,H_{2}}

= 3.6 × 10 −9 m 2 /s at 443 K. An estimated value of D

_{italice,H_{2}}

= 4 × 10 −9 m 2 /s at 443 K was obtained from the experimental data by Andersson et al47 and Ganguli and Van den Berg,48 which is in agreement with the data of Tsuto et al46…”

Section: Introductionmentioning

confidence: 97%

Intraparticle diffusion mechanisms in SC sunflower oil hydrogenation on Pd

2005

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Measurements of hydrogen—edible oil interfacial area using a homogeneous Ziegler—Natta catalyst in an agitated reactor

Cited by 13 publications

References 3 publications

Accurate hydrogenated vegetable oil viscosity predictions for monolith reactor simulations

Accurate hydrogenated vegetable oil viscosity predictions for monolith reactor simulations

Gas−Liquid Mass-Transfer and Hydrodynamic Parameters in a Soybean Oil Hydrogenation Process under Industrial Conditions

Intraparticle diffusion mechanisms in SC sunflower oil hydrogenation on Pd

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