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2019 Vol.24, Issue 3 Preview Page

Research Article

Experimental Study on Slow Pyrolysis of Biomass by Direct and Indirect Contact Heat Transfer in a Continuous Reactor

직접 및 간접열교환에 따른 연속식 반응기 내 바이오매스 저속열분해 특성에 대한 실험적 연구

Jungkeuk Park1
,
Sangho Kim1
,
Jinje Park2
,
Seunghan Yu2
,
Changkook Ryu2*
박 정극1
,
김 상호1
,
박 진제2
,
유 승한2
,
류 창국2*
1R&D Strategy Office, KEPCO Research Institute, Daejeon 34056, Republic of Korea
2School of Mechanical Engineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
1한전전력연구원 연구전략실
2성균관대학교 기계공학과
* Corresponding Author
30 September 2019. pp. 33-40
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Abstract

Biochar from pyrolysis is emerging as a new option for biomass utilization for various purposes including soil amelioration and carbon sequestration. This study investigated the slow pyrolysis characteristics of wood pellet in a continuous reactor varying the heat transfer type (direct and indirect contact) at various temperatures (400~700℃) with different carrier gas compositions (inert, O2 2%, and O2 4%). Direct contact heat transfer by preheated carrier gas accelerated the heat up of biomass, promoting the pyrolysis process as well as the temperature increase of indirect contact cases. The presence of O2 in the carrier gas resulted in limited oxidation reactions with pyrolytic vapor, increasing the reactor temperature to 529.4℃ and 591.7℃ at 2% and 4% O2, respectively, compared to the inert case having a final temperature of 492.4℃. This can be exploited to save the external heat supply but a careful temperature control is required to yield uniform biochar properties. The pyrolysis products from different test conditions were characterized for mass yield and detailed properties of biochar, bio-oil, and non-condensable gases.

Keywords
Biochar
Biomass
Continuous reactor
Slow pyrolysis
Wood pellet
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Information
  • Publisher :The Korean Society Combustion
  • Publisher(Ko) :한국연소학회
  • Journal Title :Journal of The Korean Society Combustion
  • Journal Title(Ko) :한국연소학회지
  • Volume : 24
  • No :3
  • Pages :33-40
  • Received Date : 2019-08-20
  • Revised Date : 2019-08-30
  • Accepted Date : 2019-08-30
  • DOI :https://doi.org/10.15231/jksc.2019.24.3.033
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