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Catalytic Hydrodeoxygenation of High Carbon Furylmethanes to Renewable Jet‐fuel Ranged Alkanes over a Rhenium‐Modified Iridium Catalyst
Author(s) -
Liu Sibao,
Dutta Saikat,
Zheng Weiqing,
Gould Nicholas S.,
Cheng Ziwei,
Xu Bingjun,
Saha Basudeb,
Vlachos Dionisios G.
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201700863
Subject(s) - hydrodeoxygenation , catalysis , oxygenate , chemistry , hydrogenolysis , iridium , furan , rhenium , jet fuel , organic chemistry , yield (engineering) , alkane , materials science , selectivity , metallurgy
Renewable jet‐fuel‐range alkanes are synthesized by hydrodeoxygenation of lignocellulose‐derived high‐carbon furylmethanes over ReO x ‐modified Ir/SiO 2 catalysts under mild reaction conditions. Ir−ReO x /SiO 2 with a Re/Ir molar ratio of 2:1 exhibits the best performance, achieving a combined alkanes yield of 82–99 % from C 12 –C 15 furylmethanes. The catalyst can be regenerated in three consecutive cycles with only about 12 % loss in the combined alkanes yield. Mechanistically, the furan moieties of furylmethanes undergo simultaneous ring saturation and ring opening to form a mixture of complex oxygenates consisting of saturated furan rings, mono‐keto groups, and mono‐hydroxy groups. Then, these oxygenates undergo a cascade of hydrogenolysis reactions to alkanes. The high activity of Ir−ReO x /SiO 2 arises from a synergy between Ir and ReO x , whereby the acidic sites of partially reduced ReO x activate the C−O bonds of the saturated furans and alcoholic groups while the Ir sites are responsible for hydrogenation with H 2 .