Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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A Study on the Characteristics of Torrefaction and Chlorine Release According to the Mild Pyrolysis Temperature Conditions of Biomass Fuels (WP·EFB·PKS) for Power Generation

발전용 바이오매스 연료(WP·EFB·PKS)의 열분해 온도 조건에 따른 반탄화 및 염소 방출 특성에 관한 연구

  • KIM, JI-HUN (School of mechanical Engineering, Pusan National University) ;
  • PARK, JAE-HEUN (School of mechanical Engineering, Pusan National University) ;
  • CHOI, JAE-HYUN (School of mechanical Engineering, Pusan National University) ;
  • JEON, CHUNG-HWAN (School of mechanical Engineering, Pusan National University)
  • Received : 2017.09.19
  • Accepted : 2017.12.29
  • Published : 2017.12.31
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Abstract

Wood pellet (WP), empty fruit bunch (EFB) and palm kernel shell (PKS) which are biomass fuels for power generation are selected to study the characteristics of torrefaction process. These biomass fuels are torrefied at $220^{\circ}C$, $250^{\circ}C$, and $280^{\circ}C$. The heating value of biomass fuels is increased depending on the torrefaction temperature. However, due to energy yield decline, it is not always desirable to torrefy biomass at higher temperature. Considering the mass yield and energy yield after torrefaction, the most proper temperature conditions for torrefaction of WP is $250-280^{\circ}C$ and for EFB, PKS are $220-250^{\circ}C$. Additionally, to investigate the phenomenons of chlorine release during torrefaction process, Ion Chromatography (IC) method was used. In the case of EFB and PKS torrefied at $300^{\circ}C$, the chlorine component has been reduced by 97.5% and 95.3% compared to the raw biomass, respectively. In conclusion, torrefied biomass can be used as alternative fuels in replacement of coals for both aspects of heating value and chlorine corrosion problems.

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