GCB Bioenergy, Journal Year: 2012, Volume and Issue: 5(2), P. 153 - 164

Published: Sept. 20, 2012

Abstract Char is a product of thermochemical conversion biomass via pyrolysis, together with gas (syngas), liquid (bio‐oil), and heat. Fast pyrolysis promising process for bio‐oil generation, which leaves 10–30% the original as char. produced soil application, defined biochar ( BC ), it may increase C storage, reduce emissions greenhouse gases GHG such N 2 O CH 4 –potentially making fast bioenergy generation C‐negative system. However, differences in production conditions (e.g., feedstock, temperature speed, post handling, storage conditions) influence chemical properties its net effect when added to soils. Understanding if can sequestration will enable full assessment economic value environmental benefits this form bioenergy. We characterized by examined CO , ) efflux, partitioning using δ 13 C, across four temperate soils five rates; 0%, 1%, 5%, 10%, 20% w/w. The created highly aromatic, low N, ash‐rich : ratio 0.01, we expected be recalcitrant. Across soils, increased linearly decreased exponentially increasing addition rates. Despite still being actively respired after years, total ‐derived C‐ comprised less than volatile content (4%). Expressed equivalents, was primary emitted (97.5%), followed . All were small compared SOC sequestered recalcitrant that reduced emissions. recovery application would contribute negative carbon balance generation.

Language: Английский