Intraparticle diffusion limitations in the hydrogenation of monounsaturated edible oils and their fatty acid methyl esters
| Autor: | J.W Veldsink, Gerald Jonker, Antonie A. C. M. Beenackers |
|---|---|
| Přispěvatelé: | Chemische Technologie, Faculty of Science and Engineering |
| Jazyk: | angličtina |
| Rok vydání: | 1998 |
| Předmět: |
LIQUID-FILLED PORES
Hydrogen BIPOROUS CATALYSTS General Chemical Engineering Diffusion Kinetics CHROMATOGRAPHY Analytical chemistry chemistry.chemical_element Instituut voor Agrotechnologisch Onderzoek Industrial and Manufacturing Engineering Catalysis chemistry.chemical_compound PARTICLES Life Science KINETICS Fatty acid methyl ester chemistry.chemical_classification Chromatography Fatty acid General Chemistry CATALYTIC-HYDROGENATION CHEMICAL-REACTION TRANSPORT MODEL Nickel SELECTIVITY chemistry Agrotechnological Research Institute Isomerization |
| Zdroj: | Industrial & Engineering Chemistry Research 37 (1998) 12 Industrial & Engineering Chemistry Research, 37(12), 4646-4656. AMER CHEMICAL SOC Industrial & Engineering Chemistry Research, 37(12), 4646-4656 |
| ISSN: | 0888-5885 |
| Popis: | Intraparticle diffusion limitation in the hydrogenation and isomerization of fatty acid methyl esters (FAMEs) and edible oils (triacylglycerol, TAG) in porous nickel catalyst was investigated both under reactive and under inert conditions. Under reactive conditions, the diffusion coefficients were determined from the best fits of the model simulations applying the intrinsic reacting kinetics of monounsaturated FAME hydrogenation to experiments under diffusion limited conditions. For 0.02 < PH2 < 0.50 MPa, an effective hydrogen diffusion coefficient of De,H2 = (1.6 ± 0.7) × 10-10 m2/s (T = 443 K) was obtained in Pricat 9910 (sample 1992). TAG hydrogenations, at 373 < T < 443 K and 0.30 < PH2 < 0.50 MPa, appear to be limited by diffusion limitation of TAG, yielding De,TAG = (4.5 ± 2.2) × 10-13 (T = 373 K), (2.0 ± 0.9) × 10-12 (T = 403 K), and De,TAG = (3.3 ± 1.1) × 10-12 m2/s (T = 443 K). The temperature dependency of De follows the relation Deη/T = 2 × 10-7 (m2 Pa)/K (η is the fluid viscosity, Pa s) for 37... |
| Databáze: | OpenAIRE |
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