Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Characteristics of Carbonized Biomass Produced in a Manufacturing Process of Wood Charcoal Briquettes Using an Open Hearth Kiln

평로탄화로를 이용한 성형목탄 제조공정에서 생산된 탄화 바이오매스의 특성

  • JU, Young Min (Division of Wood Chemistry, Department of forest Products, National Institute of Forest Science) ;
  • LEE, Hyung Won (Division of Wood Chemistry, Department of forest Products, National Institute of Forest Science) ;
  • KIM, Ah-ran (Division of Wood Chemistry, Department of forest Products, National Institute of Forest Science) ;
  • JEONG, Hanseob (Division of Wood Chemistry, Department of forest Products, National Institute of Forest Science) ;
  • CHEA, Kwang-Seok (Division of Wood Chemistry, Department of forest Products, National Institute of Forest Science) ;
  • LEE, Jaejung (Division of Research Planning and Coordination, National Institute of Forest Science) ;
  • AHN, Byoung-Jun (Division of Wood Chemistry, Department of forest Products, National Institute of Forest Science) ;
  • LEE, Soo Min (Division of Wood Chemistry, Department of forest Products, National Institute of Forest Science)
  • Received : 2019.11.25
  • Accepted : 2020.02.28
  • Published : 2020.03.25
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Abstract

Characteristics of carbonized biomass obtained from a Wood charcoal briquette manufacturing process using an open hearth kiln are analyzed in this research, and differences in the characteristics based on the results of a mechanical screening process and the position within the kiln. One type of biomass and five types of carbonized biomass were collected from a Wood charcoal briquette manufacturer. After screening and grinding processes were performed on samples of 1 type of biomass and 5 types of carbonized biomass extracted from a Wood charcoal briquettes manufacturer to classify by particle size, fixed carbon, ash, volatile matters, elemental composition, and high heating value (HHV) were measured. Experimental results showed that the carbonized biomass collected from the middle layer had the highest HHV, 20.4 MJ/kg, and therefore had the highest fuel quality. In terms of particle size, the carbonized biomass below 100 mesh had the lowest ash content and the highest HHV, carbon content, and fixed carbon content. Correlation analyses showed that ash content had negative correlations with HHV, volatile matters, fixed carbon, and carbon content, which suggested that ash content affected negatively on fuel quality.

본 연구는 평로탄화로 이용한 성형목탄 제조과정에서 얻은 탄화된 바이오매스의 특성을 분석하였으며, 기계적 전처리 및 평로탄화로 내 위치에 따른 특성 차이를 비교하고자 하였다. 성형목탄 제조업체에서 채취된 바이오매스 1종과 탄화 바이오매스 5종의 시료를 대상으로 선별(screening) 및 분쇄(grinding)를 통해 분석시료의 입자크기 범위별로 분류한 후, 고정탄소, 회분, 휘발성 화합물, 원소 함량, 발열량을 측정하였다. 실험 결과, 평로탄화로의 위치에 따라서는 중간층의 탄화 바이오매스 발열량이 20.4 MJ/kg으로 가장 높은 연료적 특성을 나타내었다. 선별 입자 크기에 따라서는 100 mesh 이하의 탄화 바이오매스에서 회분함량이 가장 낮았고 발열량, 탄소 함량, 고정탄소 함량은 높았다. 상관관계 분석 결과 회분 함량은 발열량, 휘발성화합물, 고정탄소, 탄소 함량과 모두 음의 상관관계를 나타내어 회분 함량이 연료적 특성에 부정적인 영향을 미치는 것을 확인하였다.

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