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Hydrodeoxygenation of stearic acid and tall oil fatty acids over Ni-alumina catalysts: Influence of reaction parameters and kinetic modelling
Authors: Jeništová Klára | Hachemi Imane | Maki-Arvela Paivi | Kumar Narendra | Peurla Markus | Čapek Libor | Warna Johan | Murzin Dmitry Yu.
Year: 2017
Type of publication: článek v odborném periodiku
Name of source: Chemical Engineering Journal
Publisher name: Elsevier Science SA
Place: Lausanne
Page from-to: 401-409
Titles:
Language Name Abstract Keywords
cze Hydrodeoxygenace kyseliny stearové a mastných kyselin talového oleje na katalyzátorech Ni-alumina: Vliv reakčních parametrů a kinetické modelování Kinetika hydrodeoxygenace kyseliny stearové byla zkoumána v přítomnosti katalyzátoru Ni-gamma-Al2O3. Hlavními proměnnými byly preredukce katalyzátoru, reakční atmosféra a tlak vodíku v rozsahu 7-30 barů. Výsledky byly diskutovány. hydrodeoxygenace; nikl; kinetické modelování
eng Hydrodeoxygenation of stearic acid and tall oil fatty acids over Ni-alumina catalysts: Influence of reaction parameters and kinetic modelling Kinetics in the hydrodeoxygenation of stearic acid was investigated over Ni-gamma-Al2O3 catalyst. The main variables were catalyst prereduction mode, reaction atmosphere and hydrogen pressure in the total pressure range of 7-30 bar. The results revealed that high conversion, 99% in 360 min and high selectivity to heptadecane, 97% were achieved at 300 degrees C under 30 bar total pressure. The yield of an intermediate hydrogenation product, stearyl alcohol increased with increasing hydrogen pressure as expected. Higher reaction rates and conversion levels were also achieved with the prereduced catalyst and carrying out the reaction in the presence of hydrogen. As a comparison to stearic acid, hydrodeoxygenation of tall oil fatty acids, an industrial feedstock was successfully demonstrated with Ni-gamma-Al2O3 under the same conditions. A kinetic model including the pressure effect was derived and applied for data with Ni-gamma-Al2O3 as well as for Pd/C, Ni-H-Y-80 and Ni/SiO2 catalysts. The model described well the kinetic data. Hydrodeoxygenation; Nickel; Kinetic modelling

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