Green Diesel from Kraft Lignin in Three Steps

Precipitated kraft lignin from black liquor was converted into green diesel in three steps. A mild Ni‐catalyzed transfer hydrogenation/hydrogenolysis using 2‐propanol generated a lignin residue in which the ethers, carbonyls, and olefins were reduced. An organocatalyzed esterification of the lignin...

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Bibliographic Details
Published in:ChemSusChem 2016-06, Vol.9 (12), p.1392-1396
Main Authors: Löfstedt, Joakim, Dahlstrand, Christian, Orebom, Alexander, Meuzelaar, Gerrit, Sawadjoon, Supaporn, Galkin, Maxim V., Agback, Peter, Wimby, Martin, Corresa, Elena, Mathieu, Yannick, Sauvanaud, Laurent, Eriksson, Sören, Corma, Avelino, Samec, Joseph S. M.
Format: Article
Language:English
Subjects:
Alliances
Anhydrides
Biofuels
catalysis
Diesel fuels
Esterification
Ethers
Fatty acids
Gas oil
green chemistry
Green Chemistry Technology - methods
Lignin
Lignin - chemistry
Nickel
Organic Chemistry
Organisk kemi
Residues
valorization
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Summary:Precipitated kraft lignin from black liquor was converted into green diesel in three steps. A mild Ni‐catalyzed transfer hydrogenation/hydrogenolysis using 2‐propanol generated a lignin residue in which the ethers, carbonyls, and olefins were reduced. An organocatalyzed esterification of the lignin residue with an in situ prepared tall oil fatty acid anhydride gave an esterified lignin residue that was soluble in light gas oil. The esterified lignin residue was coprocessed with light gas oil in a continous hydrotreater to produce a green diesel. This approach will enable the development of new techniques to process commercial lignin in existing oil refinery infrastructures to standardized transportation fuels in the future. Green diesel: A diesel fuel is produced from precipitated kraft lignin by co‐processing with tall oil fatty acid (TOFA) and light gas oil (LGO) in a continuous hydrotreater. As a key‐step, the lignin is esterified with TOFA and this intermediate is soluble in LGO. Co‐processing lignin with LGO enables controlling the exotherm and thereby also coke formation, allowing for smooth hydroprocessing using standard hydro‐treatment conditions.
ISSN:1864-5631
1864-564X
1864-564X
DOI:10.1002/cssc.201600172