Journal
FUEL
Volume 254, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.fuel.2019.05.155
Keywords
Lignocelluloses; Acid hydrotropic fractionation; Enzymatic hydrolysis and fermentation; Biofuel; Furfural
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Funding
- U.S. Forest Service
- National Key Research and Development Program of China [2017YFD0601001]
- Jiangsu Oversea Research & Training Program for University Prominent Young & Middle-aged Teachers and Presidents
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Poplar wood was fractionated into a water-insoluble cellulosic solid (WIS) fraction and a spent liquor that contained mainly dissolved lignin and xylan using an acid hydrotrope, p-Toluenesulfonic acid (p-TsOH), at low temperatures (<= 90 degrees C). Reaction-kinetics-based severities were used to scale-up fractionation using 100 g wood at p-TsOH concentration 50 wt% and 90 degrees C for 112 min. The WIS and spent liquor from a scale-up run were used to produce bioethanol and furfural, respectively. At 15% WIS loading (w/v), maximal ethanol concentration was 52.47 g/L with a fermentation efficiency of 68.3%. Direct dehydration of the virgin spent liquor resulted in a maximum furfural concentration of 5.44 g/L at 68.4% yield. Precipitating lignin in the spent liquor increased furfural concentration to 6.18 g/L and yield to 77.7%. These results demonstrate the potential of acid hydrotrope fractionation for forest biorefinery.
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