Kraft-lignin pyrolysis and fractional condensation of its bio-oil vapors
2014
Tumbalam Gooty, Akhil | Li, Dongbing | Berruti, Franco | Briens, Cedric
Kraft lignin has been pyrolyzed in a modified bubbling bed reactor coupled with an internal stirrer, and the resulting bio-oil vapors have been fractionated using a series of three condensers maintained at different temperatures. The temperatures of the condensers have been optimized in order to selectively separate most of the water present in the bio-oil vapor stream and increase the quality of the remaining bio-oil. The condenser train comprised of an electrostatic precipitator-cum-condenser (C-ESP) installed between two cyclonic condensers. The fractionated bio-oil was found to be rich in phenolic compounds with a water content of less than 1wt%. The effect of pyrolysis temperature on the fractionated bio-oil yield and characteristics is also discussed.
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