Cited by 247Soil Carbon and Nitrogen DynamicsThermochemical Biomass Conversion ProcessesFire effects on ecosystems

A method for screening the relative long‐term stability of biochar

Cross, Andrew, Sohi, Saran P.·2013·GCB Bioenergy

Abstract

Biochar is being actively explored as a tool for long‐term soil carbon sequestration. However, in order for this to be effective the long‐term environmental stability of biochar must be assured. Here, we define and test an accelerated ageing method that seeks to reflect the oxidative nature of biochar degradation in soil. The method was applied to a systematic set of biochar samples produced from sugarcane bagasse, and a set of biochar samples produced from four different biomass sources. The stability of carbon in these samples was found to range between 41.6% and 76.1%, loosely correlating with biochar O : C ratio (r = 0.73). Increasing intensity of oxidative treatment eliminated more carbon. It also increased surface O : C ratio in a manner reported for naturally aged charcoal samples. The method effectively discriminated biochar produced under contrasting pyrolysis conditions and could be used as a proxy for environmental ageing of approximately 100 years under temperate conditions.

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Crossref · 10.1111/gcbb.12035

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  • When heating rate is in the range of 5-20°C, other properties (pore volume, H/C, O/C ratio, and fixed carbon) are little affected.

    “But, when the heating rate was in the range of 5-20°C, other properties (such as pore volume, H/C, O/C ratio, and fixed carbon) were little affected (Cross and Sohi 2013).”

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Authors
Cross, A., & Sohi, S. P.
Affiliations
University of Edinburgh (GB)
Corresponding author
Cross, Andrew
Venue
GCB Bioenergy
Publisher
Wiley
Published
2012-12-31
Volume
5
Issue
2
Pages
215-220
ISSN
  • 1757-1693 (ISSN-L)
  • 1757-1707
OpenAlex
W2096289289
Cited by
247
References
31
Citations by year
2026: 13 · 2025: 19 · 2024: 24 · 2023: 29 · 2022: 23 · 2021: 28 · 2020: 19 · 2019: 16 · 2018: 19 · 2017: 15 · 2016: 15 · 2015: 10 · 2014: 10 · 2013: 4 · 2012: 2
FWCI
12.69
Type
journal article
Language
en
Open access
closed
Locations
GCB Bioenergy (publishedVersion)
Funders
Shell
Topics
  • Life Sciences › Agricultural and Biological Sciences › Soil Science › Soil Carbon and Nitrogen Dynamics
  • Physical Sciences › Engineering › Biomedical Engineering › Thermochemical Biomass Conversion Processes
  • Physical Sciences › Environmental Science › Global and Planetary Change › Fire effects on ecosystems
Keywords
biochar, long-term stability, accelerated aging, soil carbon sequestration, oxidative degradation, carbon loss, O/C ratio, sugarcane bagasse, biomass pyrolysis, environmental aging

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