Journal of the Korean Wood Science and Technology

The Korean Society of Wood Science & Technology (한국목재공학회)
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Improvement in The Fuel Characteristics of Empty Fruit Bunch by Leaching and Wet Torrefaction

용탈처리와 습식 반탄화에 의한 Empty Fruit Bunch의 연료적 특성 향상

  • Gong, Sung-Ho (Department of forest Products and Technology, Chonnam National University) ;
  • Lee, Hyoung-Woo (Department of forest Products and Technology, Chonnam National University) ;
  • Lee, Jae-Won (Department of forest Products and Technology, Chonnam National University)
  • 공성호 (전남대학교 농업생명과학대학 산림자원학부) ;
  • 이형우 (전남대학교 농업생명과학대학 산림자원학부) ;
  • 이재원 (전남대학교 농업생명과학대학 산림자원학부)
  • Received : 2016.01.28
  • Accepted : 2016.03.14
  • Published : 2016.05.25
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Abstract

In this study, sequential leaching and wet torrefaction were performed to improve the fuel characteristics of empty fruit bunch (EFB). Leaching was carried out at $25{\sim}90^{\circ}C$ for 5~30 min. The highest ash removal efficiency of 55.99% was achieved when leaching was performed at $90^{\circ}C$ for 10 min. The ash removal efficiency was dependent more on leaching temperature than time. Wet torrefaction was carried out at $180{\sim}200^{\circ}C$ for 5~40 min, following the leaching. Most of the inorganic compounds were removed at removal efficiencies of 41.05~63.58% during sequential leaching and wet torrefaction, while silica remained in the biomass. Chloride, calcium, magnesium, and phosphorus showed more than 80% removal efficiencies. The calorific value of EFB increased to 7.96% (4730 kcal/kg) in comparison to the raw material (4390 kcal/kg) when wet torrefaction was performed at $200^{\circ}C$ for 40 min following leaching.

본 연구에서는 팜 부산물인 Empty Fruit Bunch (EFB)의 연료적 특성을 향상시키기 위해 용탈처리와 습식 반탄화를 연속적으로 수행하였다. 용탈처리는 $25{\sim}90^{\circ}C$에서 5~30분 수행하였으며, $90^{\circ}C$, 10분 조건에서 55.99%의 가장 높은 회분 감소율을 나타냈다. 회분 감소율은 용탈 시간보다 온도에 따라 영향을 받았다. 용탈처리 후 연속적으로 습식 반탄화를 수행하였으며 반응온도 $180{\sim}200^{\circ}C$, 반응시간 5~40분에서 실시하였다. 연속처리에 의해 규소를 제외한 대부분의 무기성분은 제거되었으며 회분 감소율은 41.05~63.58%로 나타났다. 특히, 염소, 칼륨, 마그네슘, 인 성분은 80%이상 제거되었다. 용탈처리 후 $200^{\circ}C$, 40분에서 습식 반탄화를 수행한 결과 발열량은 원시료(4390 kcal/kg)와 비교하여 7.96% 증가한 4736 kcal/kg를 나타냈다.

Keywords

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