Kinetik der Fetthärtung und Vergleich verschiedener Katalysatoren

Münzing, Michael; Kut, Oemer M.; Gut, G.

doi:10.1002/lipi.19860881005

Cited by 6 publications

(1 citation statement)

References 4 publications

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“…In our kinetic analysis each reaction step is allowed to either control the overall conversion rate or to proceed close to equilibrium. The adsorption of the double bonds of O and E on the supported nickel surface (A1 and B1) is usually assumed to be at equilibrium (Vandenheuvel, 1956;Van der Plank, 1972a,b;Zwicky and Gut, 1978;Gut et al, 1979), though nonequilibrium adsorption was also incorporated to fit experimental data (Tsuto et al, 1978;Grau et al, 1986;Mu ¨nzing et al, 1986). Van der Plank and Van Oosten (1975) concluded from migration of double bonds of monoene FAME molecules that the first hydrogen insertion should be rate determining.…”

Section: Hydrogenation Mechanismmentioning

confidence: 99%

Intrinsic Kinetics of 9-Monoenic Fatty Acid Methyl Ester Hydrogenation over Nickel-Based Catalysts

Jonker

Veldsink

Beenackers

1997

Ind. Eng. Chem. Res.

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The monoenic fatty acid methyl ester hydrogenation and isomerization over a supported nickel catalyst was studied at 0.02 e P H 2 e 0.50 MPa and 333 e T e 443 K. Batch hydrogenations at constant and variable hydrogen pressure were carried out to investigate the rate-determining steps. On the basis of the Horiuti-Polanyi mechanism, involving a half-hydrogenated surface intermediate, kinetic rate equations were systematically derived following the Langmuir-Hinshelwood-Hougen-Watson approach. Each set of rate equations was tested by means of a χ 2 method on its ability to describe the experimental curves simultaneously. The χ 2 was minimized by a stepwise optimization of model parameters. Furthermore, we used Bartlett's test to reduce the set of most-likely rate expressions. The statistically most significant model assumes the formation of the half-hydrogenated surface intermediate as the rate-determining step and an equilibrium associative hydrogen adsorption. The rate equations are R O )

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Section: Hydrogenation Mechanismmentioning

confidence: 99%

Intrinsic Kinetics of 9-Monoenic Fatty Acid Methyl Ester Hydrogenation over Nickel-Based Catalysts

Jonker

Veldsink

Beenackers

1997

Ind. Eng. Chem. Res.

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Fatty Acids

Anneken

Both²,

Christoph³

et al. 2006

Ullmann's Encyclopedia of Industrial Chemistry

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The article contains sections titled: 1. Introduction 2. Properties 2.1. Physical Properties 2.2. Chemical Properties 3. Production of Natural Fatty Acids 3.1. Resources and Raw Materials 3.2. Fat Splitting 3.2.1. Hydrolysis – Principles 3.2.2. Hydrolysis – Industrial Procedure 3.2.3. Hydrolysis – Enzymatic Processes 3.3. Separation of Fatty Acids 3.3.1. Distillation 3.3.2. Crystallization 3.4. Modification of Fatty Acids 3.4.1. Hydrogenation 3.4.2. Double Bond Isomerization 3.4.3. Dehydration 3.4.4. Dimerization 3.4.5. Ozonolysis 3.4.6. Thermal Decomposition 3.4.7. Bio‐Oxidation of Fatty Acids 3.4.8. Enzymatic Esterification 4. Production of Synthetic Fatty Acids 4.1. Hydroformylation 4.2. Hydrocarboxylation 4.3. Other Commercial and Noncommercial Processes 5. Analysis 6. Storage and Transportation 7. Environmental Protection, Toxicology and Occupational Health 8. Uses 9. References

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