Technical, Economical, and Climate-Related Aspects of Biochar Production Technologies: A Literature Review Sebastian Meyer*<http://pubs.acs.org/doi/full/10.1021/es201792c#cor1>†, Bruno Glaser‡, and Peter Quicker§ Bioenergy Unit, Ecofys, 81243 München, Germany Soil Biogeochemistry, Martin-Luther-University Halle-Wittenberg, 06120 Halle, Germany Unit of Technology of Fuels, RWTH Aachen, 52062 Aachen, Germany Environ. Sci. Technol., 2011, 45 (22), pp 9473–9483 DOI: 10.1021/es201792c Publication Date (Web): September 30, 2011 Copyright © 2011 American Chemical Society E-mail: seppme...@gmx.net<mailto:seppme...@gmx.net>; phone: 0049-176-23595765. Abstract [cid:image003.jpg@01CCA2B0.1CC4DFF0]<javascript:void(0);>
For the development of commercial biochar projects, reliable data on biochar production technologies is needed. For this purpose, peer-reviewed scientific articles on carbonization technologies (pyrolysis, gasification, hydrothermal carbonization, and flash carbonization) have been analyzed. Valuable information is provided by papers on pyrolysis processes, less information is available on gasification processes, and few papers about hydrothermal and flash carbonization technologies were identified. A wide range of data on the costs of char production (between 51 US$ per tonne pyrolysis biochar from yard waste and 386 US$ per tonne retort charcoal) and on the GHG balance of biochar systems (between −1054 kg CO2e and +123 kg CO2e per t dry biomass feedstock) have been published. More data from pilot projects are needed to improve the evaluation of biochar production technologies. Additional research on the influence of biochar application on surface albedo, atmospheric soot concentration, and yield responses is necessary to assess the entire climate impact of biochar systems. Above all, further field trials on the ability of different technologies to produce chars for agricultural soils and carbon sequestration are essential for future technology evaluation. -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to geoengineering@googlegroups.com. To unsubscribe from this group, send email to geoengineering+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en.
