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Catalytic Tandem Reaction for the Production of Jet and Diesel Fuel Range Alkanes
Author(s) -
Li Hu,
Gui Zhenyou,
Yang Song,
Qi Zhiwen,
Saravanamurugan Shunmugavel,
Riisager Anders
Publication year - 2018
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201700637
Subject(s) - hydrodeoxygenation , chemistry , catalysis , alkylation , oxygenate , furan , organic chemistry , jet fuel , reactivity (psychology) , lewis acids and bases , selectivity , medicine , alternative medicine , pathology
Jet and diesel fuels are typically composed of C 9 ‐C 14 and C 12 ‐C 20 hydrocarbons, respectively, but the carbon‐chain length of sugar‐derived aldehydes and furanic compounds is no longer than C 6 . Here, a cascade catalytic process involving alkylation and hydrodeoxygenation (HDO) of 2‐methylfuran (2‐MF) with different aldehydes is conducted to directly produce long‐chain alkanes with exclusive carbon number of C 11 ‐C 17 in overall yields of 50–84 %. Preliminary investigations on the alkylation of 2‐MF and formalin show that the relative density of Lewis and Brønsted acidic sites of zeolitic materials remarkably affect their catalytic activity and selectivity. Sn‐beta(12.5) with pronounced Lewis acidity (including the acid density and strength) exhibits higher catalytic performance in the alkylation than other zeolites, producing long‐chain oxygenates in 58–92 % yields. Even in aqueous solution, the Sn‐beta(12.5) catalyst can be reused for at least six reaction cycles with almost constant reactivity. More importantly, the co‐addition of Hf(OTf) 4 with Pd/C greatly promotes C−O bond cleavage of the furan‐ring during the HDO process under mild reaction conditions, producing long‐chain alkanes in high yields of 84–94 %.