Sulfur-free Ni catalyst for production of green diesel by hydrodeoxygenation

A1 Originalartikel i en vetenskaplig tidskrift (referentgranskad)


Interna författare/redaktörer


Publikationens författare: Imane Hachemi, Narendra Kumar, Päivi Mäki-Arvela, Jorma Roine, Markus Peurla, Jarl Hemming, Jarno Salonen, Dmitry Yu. Murzin
Publiceringsår: 2017
Tidskrift: Journal of Catalysis
Volym: 347
Artikelns första sida, sidnummer: 205
Artikelns sista sida, sidnummer: 221
eISSN: 1090-2694


Abstrakt

Sulfur-free Ni supported on H-Y zeolites, γ-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.


Nyckelord

Chemical Engineering

Senast uppdaterad 2020-19-01 vid 03:28