LCA of alternative biochar production technologies
| Autor: | San Miguel Alfaro, Guillermo, Méndez, A. M., Gasco, G., Quero, A. |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: | |
| Zdroj: | Proceedings of the 15th International Conference on Environmental Science and Technology | 15th International Conference on Environmental Science and Technology | 31st August to 2nd September 2017 | Rhodes, Greece Archivo Digital UPM Universidad Politécnica de Madrid |
| Popis: | This paper investigates the environmental performance of biochar produced using different technologies including: traditional earth kiln; metal ring kiln, Missouri kiln and Missouri with gas recycling. The analysis has been produced using Life Cycle Analysis (LCA) and includes extensive inventory of direct gas emissions during the carbonization stage. The normalized analysis evidence that the impact categories most severely affected are photochemical oxidant formation, human toxicity and climate change. In the case of climate change, impact values ranged between 2773 and 4714 kg CO2/ton, with lower emissions produced by advanced carbonization technologies due to higher product yields, improved thermal efficiency (which results in reduced combustion of primary products) and elimination of volatile pollutants in the gas condenser and post-combustor. Single point indicator analysis evidences a 33-40 % reduction in environmental impact when using advanced processing methods compared to traditional charcoal production. |
| Databáze: | OpenAIRE |
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