A life cycle evaluation of wood pellet gasification for district heating in British Columbia |
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Authors: | Pa Ann Bi Xiaotao T Sokhansanj Shahab |
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Affiliation: | a Clean Energy Research Centre for University of British Columbia, 2360 East Mall Vancouver, BC, Canada, V6T 1Z3 b Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA |
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Abstract: | 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. |
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Keywords: | Life cycle analysis (LCA) Wood pellets British Columbia District heating Gasification |
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