| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 7079515 | Bioresource Technology | 2013 | 8 Pages |
Abstract
TGA results indicated that the maximum decomposition temperature of the biomass decreased from 373.9 to 359.0 °C with increasing potassium concentration. For fast pyrolysis, char yield of potassium impregnated biomass doubled regardless of pyrolysis temperature compared to demineralized one. The presence of potassium also affected bio-oil properties. Water content increased from 14.4 to 19.7 wt% and viscosity decreased from 34 to 16.2 cSt, but the pH value of the bio-oil remained stable. Gas chromatography/mass spectroscopy (GC/MS) analysis revealed that potassium promoted thermochemical reactions, thus causing a decrease of levoglucosan and an increase of small molecules and lignin-derived phenols in bio-oil. Additionally, various forms of aromatic hydrocarbons, probably derived from lignins, were detected in non-condensed pyrolytic gas fractions.
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Authors
Hyewon Hwang, Shinyoung Oh, Tae-Su Cho, In-Gyu Choi, Joon Weon Choi,