Nature – Buss et al. (2022): Mineral-enriched biochar delivers enhanced nutrient recovery and carbon dioxide removal
Wolfram Buss, Christian Wurzer, David A. C. Manning, Eelco J. Rohling, Justin Borevitz, Ondřej Mašek IN: Commun Earth Environ 3, 67 (2022). https://doi.org/10.1038/s43247-022-00394-w
Biochar production via biomass pyrolysis with subsequent burial in soils provides a CDR technology that is ready for implementation, yet uptake requires acceleration; notably, through generation of cost reductions and co-benefits. Here the authors determined that biomass enrichment (doping) with refined minerals, mineral by-products, or ground rocks reduces carbon loss during pyrolysis, lowering carbon dioxide removal costs by 17% to US$ 80–150 t−1 CO2, with 30% savings feasible at higher biomass costs.