A1 Vertaisarvioitu alkuperäisartikkeli tieteellisessä lehdessä
Sulfur-free Ni catalyst for production of green diesel by hydrodeoxygenation
Tekijät: Hachemi I, Kumar N, Maki-Arvela P, Roine J, Peurla M, Hemming J, Salonen J, Murzin DY
Kustantaja: ACADEMIC PRESS INC ELSEVIER SCIENCE
Julkaisuvuosi: 2017
Journal: Journal of Catalysis
Tietokannassa oleva lehden nimi: JOURNAL OF CATALYSIS
Lehden akronyymi: J CATAL
Vuosikerta: 347
Aloitussivu: 205
Lopetussivu: 221
Sivujen määrä: 17
ISSN: 0021-9517
DOI: https://doi.org/10.1016/j.jcat.2016.12.009
Tiivistelmä
Sulfur-free Ni supported on H-Y zeolites, gamma-Al2O3 and SiO2 synthesized by the wet impregnation method, and Pd/C were tested in hydrodeoxygenation (HDO) of stearic acid. The catalysts were forming n-heptadecane except Ni/H-Y-80, which was producing n-heptadecane and n-octadecane. Ni/H-Y 80 and Pd/C were tested on HDO of fatty acid methyl esters from chlorella, tall oil fatty acids, and animal fat. The reactions converting the substrates to the final products followed the path from unsaturated esters to acids, with hydrogenation of the latter into alcohols (i.e., stearyl alcohol), and finally formation of hydrocarbons. Ni/H-Y-80 permitted rapid and complete conversion into hydrocarbons, while Pd/C displayed 5-20 times lower turnover frequency, producing saturated intermediates along with hydrocarbons. The catalyst reusability of Ni supported on Y zeolites was studied by recycling and regenerating the spent catalyst from fatty acid HDO. The catalysts demonstrated the possibility of restoring the rates per unit of surface area after regeneration. Catalysts used in HDO of different feedstocks were investigated by thermogravimetric analysis, inductively coupled plasma-optical emission spectroscopy, transmission electron microscopy, surface area measurements, and pore size analysis. (C) 2016 Elsevier Inc. All rights reserved.
Sulfur-free Ni supported on H-Y zeolites, gamma-Al2O3 and SiO2 synthesized by the wet impregnation method, and Pd/C were tested in hydrodeoxygenation (HDO) of stearic acid. The catalysts were forming n-heptadecane except Ni/H-Y-80, which was producing n-heptadecane and n-octadecane. Ni/H-Y 80 and Pd/C were tested on HDO of fatty acid methyl esters from chlorella, tall oil fatty acids, and animal fat. The reactions converting the substrates to the final products followed the path from unsaturated esters to acids, with hydrogenation of the latter into alcohols (i.e., stearyl alcohol), and finally formation of hydrocarbons. Ni/H-Y-80 permitted rapid and complete conversion into hydrocarbons, while Pd/C displayed 5-20 times lower turnover frequency, producing saturated intermediates along with hydrocarbons. The catalyst reusability of Ni supported on Y zeolites was studied by recycling and regenerating the spent catalyst from fatty acid HDO. The catalysts demonstrated the possibility of restoring the rates per unit of surface area after regeneration. Catalysts used in HDO of different feedstocks were investigated by thermogravimetric analysis, inductively coupled plasma-optical emission spectroscopy, transmission electron microscopy, surface area measurements, and pore size analysis. (C) 2016 Elsevier Inc. All rights reserved.
Turun yliopiston Tutkimustietojärjestelmän portaali