Publikace detail

Hydrodeoxygenation of stearic acid and tall oil fatty acids over Ni-alumina catalysts: Influence of reaction parameters and kinetic modelling

Rok: 2017

Druh publikace: článek v odborném periodiku

Název zdroje: Chemical Engineering Journal

Název nakladatele: Elsevier Science SA

Místo vydání: Lausanne

Strana od-do: 401-409

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
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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