Formation of aromatic ring structures during the thermal treatment of mallee wood cylinders at low temperature

Shengjuan Jiang, Xun Hu, Daohong Xia and Chun-Zhu Li

Applied Energy, 2016, vol. 183, issue C, 542-551

Abstract: Aromatics are important components in the tars from biomass gasification or in bio-oil from pyrolysis. This study investigated the formation of polycyclic aromatics during the thermal treatment of mallee wood at low temperature. The formation of tar was negligible below 200°C but became significant above 230°C. At the same time, the abundance of aromatics also became significant above 230°C. In addition, it was found that some aromatics were formed even at temperatures as low as 150°C. These aromatics were trapped in the resultant chars but could be extracted with solvents (i.e. methanol/chloroform). The abundance of trapped aromatics was different between the outer surface and the centre of the char (cylinder shape). FT-IR and UV-fluorescence analysis revealed that the aromatics contained polar functionalities (e.g. carbonyl groups) on the benzene rings. Some unsaturated hydroxyl aldehyde/ketone intermediates were formed in parallel with the aromatics.

Keywords: Pyrolysis; Gasification; Aromatic; Wood cylinders; Thermal treatment (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (1)

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DOI: 10.1016/j.apenergy.2016.09.015

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