State-of-the-art of Life Cycle Assessment for Biodiesel Production from Plant Biomass

식물성 바이오매스로부터 바이오디젤 생산에 대한 LCA 연구 현황

  • Seo, Bong-Kuk (Division of Sustainable Chemical Technology, Korea Research Institute of Chemical Technology) ;
  • Song, Seung-Koo (School of Applied Chemical Engineering, Pusan National University)
  • 서봉국 (한국화학연구원 그린화학연구단) ;
  • 송승구 (부산대학교 응용화학공학부)
  • Received : 2009.10.23
  • Accepted : 2009.11.16
  • Published : 2010.02.28

Abstract

Biodiesel is a type of biofuel obtained from bioresources and able to use in diesel vehicles as an alternative/additive to petro diesel. In recent biodiesel research, there are three main issues which include high quality biodiesel, low cost feed stock and a highly efficient biodiesel production process. The sustainable production and use of biodiesel are attracting much attention in the renewable energy field. In this paper, we review some of the literatures related to environmental and economic evaluation for biodiesel production and analysis the issues including life cycle assessment (LCA), global warming potential (GWP), energy consumption, biodiesel production cost, production technologies and feedstock.

기존 화석연료를 대체할 수 있는 수송연료로서 바이오 디젤은 유해물질 배출을 줄일 수 있어 친환경 에너지로 기대를 모으고 있다. 바이오디젤 관련 기술 개발 방향을 설정하고 제도적 지원을 위해서는 바이오 디젤의 친환경 특성 및 경제성 등에 대한 보다 정량적이고 정성적인 평가가 필요하며, 바이오디젤 생산과정에서 지구 온난화 지수, 에너지소비, 생산비용, 생산기술 및 feedstock에 대한 LCA 분석 연구를 통해 보다 체계적인 환경 및 경제성 평가가 가능하였다. Feedstock에서부터 연료사용에 이르기까지의 바이오 디젤 LCA 평가와 관련한 많은 연구에서 feedstock 생산과정의 온실가스 배출량과 에너지 소비가 전체 환경 및 경제성 평가 수치의 50-80% 범위를 차지하여, 가장 큰 주요 기여 인자가 되었다. 경제성 측면에서는 초임계 메탄올 공정을 이용하여 폐식용유로부터 바이오디젤을 생산하는 과정이 현실적으로, 기술적으로 가장 유리하였다. 향후, 바이오 연료 시장을 보다 확장하고 보다 광범위하게 사용하기 위해서는 바이오디젤의 물성개선을 비롯하여 원료에 대한 식량과의 논쟁을 피하기 위한 지속가능한 원료확보 관련 연구도 수행되어야만 할 것이다.

Keywords

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