A comprehensive life cycle analysis of a biomass energy system

Kiyoshi Dowaki, Hisashi Ishitani, Ryuji Matsuhashi, Nalish Sam

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This paper evaluates life cycle CO2 (LCCO2) emissions by comparing a biomass power plant with a coal power plant of the CO2 removal system. For the concrete investigation of the biomass life cycle analysis, (LCA), the reforestation site in Madang Province in Papua New Guinea (PNG) was selected as a model area. Then Eucalyptus deglupta-which is one of the fast-growing trees-was adopted as a biomass material. First, the characteristics of Eucalyptus deglupta and the feasibility of the sustainable reforestation management in PNG was investigated. It was estimated that LCCO2 emissions in the cultivation process was 21,556 t-CO2/y-provided that the scale of reforestation area was 20,160 ha, the terrain gradient was 5 degrees, and nutrient-losses by soil erosion are also taken into consideration. Second, the Biomass Integrated Gasification Combined Cycle plant was designed. In particular, the performance of the gasifier was calculated using the basic experimental data. In the case of the input of biomass of 35.0 t/h and a moisture content of 20% (wet-base), the net power output was 80 MW and the net system efficiency was 39.8%. Consequently, it was estimated that the minimum LCCO2 emissions of a biomass power was 45.8 g-CO2/kWh, while that of a coal power with CO2 removal equipment was 50.5 g-CO2/kWh.

Original languageEnglish
Pages (from-to)193-204
Number of pages12
Issue number4-6
Publication statusPublished - 1 Jan 2002


Cite this

Dowaki, K., Ishitani, H., Matsuhashi, R., & Sam, N. (2002). A comprehensive life cycle analysis of a biomass energy system. Technology, 8(4-6), 193-204.