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Production of Clean Pyrolytic Sugars for Fermentation
Author(s) -
Rover Marjorie R.,
Johnston Patrick A.,
Jin Tao,
Smith Ryan G.,
Brown Robert C.,
Jarboe Laura
Publication year - 2014
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.201301259
Subject(s) - chemistry , fermentation , hydrolysis , raffinate , sugar , pyrolytic carbon , organic chemistry , phenols , pyrolysis , aqueous solution , substrate (aquarium) , extraction (chemistry) , oceanography , geology
This study explores the separate recovery of sugars and phenolic oligomers produced during fast pyrolysis with the effective removal of contaminants from the separated pyrolytic sugars to produce a substrate suitable for fermentation without hydrolysis. The first two stages from a unique recovery system capture “heavy ends”, mostly water‐soluble sugars and water‐insoluble phenolic oligomers. The differences in water solubility can be exploited to recover a sugar‐rich aqueous phase and a phenolic‐rich raffinate. Over 93 wt % of the sugars is removed in two water washes. These sugars contain contaminants such as low‐molecular‐weight acids, furans, and phenols that could inhibit successful fermentation. Detoxification methods were used to remove these contaminants from pyrolytic sugars. The optimal candidate is NaOH overliming, which results in maximum growth measurements with the use of ethanol‐producing Escherichia coli .