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A life cycle evaluation of wood pellet gasification for district heating in British Columbia
- Pa, Ann, Bi, Xiaotao T., Sokhansanj, Shahab
- Bioresource technology 2011 v.102 no.10 pp. 6167-6177
- air quality, combustion, emissions, gasification, greenhouse gases, human health, life cycle assessment, natural gas, pellets, waste wood, wood, British Columbia
- The replacement of natural gas combustion for district heating by wood waste and wood pellets gasification systems with or without emission control has been investigated by a streamlined LCA. While stack emissions from controlled gasification systems are lower than the applicable regulations, compared to the current base case, 12% and 133% increases are expected in the overall human health impacts for wood pellets and wood waste, respectively. With controlled gasification, external costs and GHG emission can be reduced by 35% and 82% on average, respectively. Between wood pellets and wood waste, wood pellets appear to be the better choice as it requires less primary energy and has a much lower impact on the local air quality.