Skip to Main Content
Dynamic dielectric properties of a wood liquefaction system using polyethylene glycol and glycerolAuthor(s): Mengchao Zhou; Thomas L. Eberhardt; Bo Cai; Chung-Yun Hse; Hui Pan
Source: ACS Sustainable Chemistry & Engineering, Vol. 5(1): 1123-1131.
Publication Series: Scientific Journal (JRNL)
Station: Southern Research Station
View PDF (1.0 MB)
DescriptionMicrowave-assisted liquefaction has shown potential for rapid thermal processing of lignocellulosic biomass. The efficiency of microwave heating depends largely on the dielectric properties of the materials being heated. The objective of this study was to investigate the dynamic interactions between microwave energy and the reaction system during the liquefaction of a woody biomass sample. The dielectric properties of poplar wood particles, model compounds representing the three main chemical components of wood, and individual liquefaction solvent components, along with their mixtures, were measured to evaluate their abilities to convert microwave energy to heat at different frequencies. Dry samples of wood particles, cellulose, xylan, and lignin were all poor microwave energy absorbers as indicated by their low dielectric values relative to the liquefaction solvent components and their mixtures; among the two solvents, polyethylene glycol had lower dielectric values than glycerol, likely due to its larger molecular size. Ionic conduction significantly affected the dielectric loss factor of the liquefaction solvent mixture upon the addition of the sulfuric acid catalyst. During the wood liquefaction reactions, temperature was the main factor that governed the dielectric properties through the preheating stage, and then when the system reached 130 °C, the dielectric properties were governed by changes in chemical composition.
- You may send email to email@example.com to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationZhou, Mengchao; Eberhardt, Thomas L.; Cai, Bo; Hse, Chung-Yun; Pan, Hui. 2017. Dynamic dielectric properties of a wood liquefaction system using polyethylene glycol and glycerol. ACS Sustainable Chemistry & Engineering. 5(1): 1123-1131. 9 p. 10.1021/acssuschemeng.6b02447
KeywordsBiomass, Dynamic dielectric properties, Microwave energy, Liquefaction
- Selective catalytic conversion of waste lignocellulosic biomass for renewable value-added chemicals via directional microwave-assisted liquefaction
- Microwave-assisted liquefaction of rape straw for the production of bio-oils
- Liquefaction of torrefied wood using microwave irradiation
XML: View XML