期刊
BIORESOURCE TECHNOLOGY
卷 212, 期 -, 页码 245-253出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.04.052
关键词
Biochar; Bioenergy; Hybrid thermochemical processing; Crop residue; Trade-off
A Life Cycle Assessment is conducted on pyrolysis coupled to anaerobic digestion to treat corn stovers and to obtain bioenergy and biochar. The analysis takes into account the feedstock treatment process, the fate of products and the indirect effects due to crop residue removal. The biochar is considered to be used as solid fuel for coal power plants or as soil conditioner. All results are compared with a corresponding fossil-fuel-based scenario. It is shown that the proposed system always enables relevant primary energy savings of non-renewable sources and a strong reduction of greenhouse gases emissions without worsening the abiotic resources depletion. Conversely, the study points out that the use of corn stovers for mulch is critical when considering acidification and eutrophication impacts. Therefore, removal of corn stovers from the fields must be planned carefully. (C) 2016 Published by Elsevier Ltd.
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