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Is application of biochar to soil really carbon negative? The effect of methodological decisions in Life Cycle Assessment.
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SYSNO ASEP 0547713 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Is application of biochar to soil really carbon negative? The effect of methodological decisions in Life Cycle Assessment. Author(s) Matuštík, J. (CZ)
Pohořelý, Michael (UCHP-M) RID, ORCID, SAI
Kočí, V. (CZ)Article number 151058 Source Title Science of the Total Environment. - : Elsevier - ISSN 0048-9697
Roč. 807, č. 3 (2022)Number of pages 10 s. Language eng - English Country NL - Netherlands Keywords life cycle assessment ; biochar soil application ; climate change ; waste biomass ; gasification Subject RIV JE - Non-nuclear Energetics, Energy Consumption ; Use OECD category Energy and fuels Method of publishing Open access with time embargo (11.02.2024) Institutional support UCHP-M - RVO:67985858 UT WOS 000740212500010 EID SCOPUS 85118237526 DOI 10.1016/j.scitotenv.2021.151058 Annotation One of the proposed solutions for improving soil conditions and mitigating climate change, two of the urgent environmental issues of today, is application of biochar to soil. This carbonaceous material made from a large variety of biomass feedstocks, by several different processes, and at various conditions is envisaged to remain stable in soil for centuries and thus effectively keep carbon out of the atmosphere. Nevertheless, a careful analysis of the entire system of biochar production and application is necessary, before such solutions are applied at a large scale, to avoid creating an even bigger environmental problem. One well-established method to do so is Life Cycle Assessment (LCA). This method has already been applied by many authors to assess biochar-to-soil projects, and based on this literature it appears that biochar application indeed contributes to climate change mitigation. However, even with such a standardized and widely used method like LCA, there are vast methodological differences between the LCA studies. Furthermore, whether the climate impact of biogenic carbon should be considered is an unresolved issue common to all assessments of biomass-utilizing projects. The effects of those and other methodological issues are investigated in the case study of the gasifier in Zlatá Olešnice. The results show that whether a project of biochar application to soil is deemed environmentally beneficial largely depends both on the context of the project as well as the methodological decisions, especially regarding biogenic carbon. Nevertheless, it can be concluded that biochar production from waste feedstock in most cases leads to climate change mitigation. Workplace Institute of Chemical Process Fundamentals Contact Eva Jirsová, jirsova@icpf.cas.cz, Tel.: 220 390 227 Year of Publishing 2023 Electronic address http://hdl.handle.net/11104/0323895
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