Journal of Biosystems Engineering

Korean Society for Agricultural Machinery (한국농업기계학회)
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Performance Analysis of a Vacuum Pyrolysis System

  • Ju, Young Min (Division of Wood Chemistry & Microbiology, Department of Forest Products, Korea Forest Research Institute) ;
  • Oh, Kwang Cheol (Department of Biosystems Engineering, Kangwon National University) ;
  • Lee, Kang Yol (Eco Plant Co., Ltd.) ;
  • Kim, Dae Hyun (Department of Biosystems Engineering, Kangwon National University)
  • Received : 2018.01.17
  • Accepted : 2018.02.26
  • Published : 2018.03.01
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Abstract

Purpose: The purpose of this study was to investigate the performance of a vacuum pyrolysis system, to analyze bio-oil characteristics, and to examine the applicability for farm-scale capacity. Methods: The biomass was pyrolyzed at 450, 480, and $490^{\circ}C$ on an electric heat plate in a vacuum reactor. The waste heat from the heat exchanger of the reactor was recycled to evaporate water from the bio-oil. The chemical composition of the bio-oil was analyzed by gas chromatography-mass spectrometry (GC-MS). Results: According to the analysis, the moisture content (MC) in the bio-oil was approximately 9%, the high heating value (HHV) was approximately 26 MJ/kg, and 29 compounds were identified. These 29 compounds consisted of six series of carbohydrates, 17 series of lignins, and six series of resins. Conclusions: Owing to low water content and the oxygen content, the HHV of the bio-oil produced from the vacuum reactor was higher by about 6 MJ/kg than that of the bio-oil produced from a fluidized bed reactor.

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