Abstract
Bio-oil distillation characteristics and product distribution are essential for optimizing parameters and reactor design. In this study, full temperature range analysis, from the initial distillation point to coking point (100–300 ℃), was conducted. Eight typical compounds in bio-oil were precisely quantified by gas chromatography-flame ionization detector (GC-FID) analysis. The result showed a common critical point was widely present during the distillation process, which might be attributed to a stable system formed by hydrogen bonds. Accordingly, bio-oil distillation could be divided into three stages: the stable stage, explosion stage, and coking stage. At the explosion stage with the optimum distillation rate, and the content of guaiacol and 4-methylguaiacol in the oil phase fraction was up to 21.89% and 5.50%, respectively. The detailed distillation characteristics and product distribution provide an in-depth understanding of the reaction mechanism and enrichment patterns of the components, serving as a guide for the design and parameter optimization.
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