The effect of pyrolysis conditions on biochar stability as determined by three methods

  title={The effect of pyrolysis conditions on biochar stability as determined by three methods},
  author={Kyle Crombie and Ondřej Ma{\vs}ek and Saran P. Sohi and Peter Brownsort and Andrew Cross},
  journal={GCB Bioenergy},
Biochar is the porous, carbonaceous material produced by thermochemical treatment of organic materials in an oxygen‐limited environment. In general, most biochar can be considered resistant to chemical and biological decomposition, and therefore suitable for carbon (C) sequestration. However, to assess the C sequestration potential of different types of biochar, a reliable determination of their stability is needed. Several techniques for assessing biochar stability have been proposed, e.g… 
Pyrolysis biochar systems, balance between bioenergy and carbon sequestration
This study aimed to investigate the extent to which it is possible to marry the two seemingly opposing concepts of heat and/or power production from biomass with carbon sequestration in the form of
Vermiculite modification increases carbon retention and stability of rice straw biochar at different carbonization temperatures
Abstract Biochar is considered a promising material for sequestering CO2 from the atmosphere, thus helping to alleviate climate change when returned to the soil. Biochar stability is the most
The comparison study of multiple biochar stability assessment methods
  • Jiefeng Chen, Pengyu Wang, +10 authors Wenguang Zhou
  • Chemistry
  • 2021
Abstract The stability of biochar means the potential capability of fixing carbon in biochar in the soil environment. The stability assessment method is significant to its potential, but the
Characterization of Biochars Produced from Various Biowastes
Biochar is a product of thermal degradation of organic materials in the absence of air (pyrolysis). Slowpyrolyzed and biowaste-derived biochars show excellent adsorption properties. Studies on
An overview of the effect of pyrolysis process parameters on biochar stability.
This review found that relative high temperature, long reaction residence time, slow heating rate, high pressure, the presence of some minerals and biomass feedstock of high-lignin content with large particle size are preferable to biochar stability, however, challenges exist to mediate the trade-offs between bio char stability and other potential wins.
A decision support method for biochars characterization from carbonization of grape pomace
Abstract Grape pomace can be used to produce several products, such as, biofuels, fertilizers, or catalysts. This work focuses on the carbonization of grape pomace assessing the impact of the
Effect of pyrolysis temperature on the chemical oxidation stability of bamboo biochar.
The biochar showed a better stability at a higher pyrolysis temperature, and the main oxygen-containing functional groups gradually decreased, while the degree of aromatization increased accordingly.
Effect of feedstock and pyrolysis temperature on properties of biochar governing end use efficacy
Abstract The aim of this study was to systemically evaluate how feedstock characteristics and temperature influence biochar evolution during pyrolysis and to establish their relationships with
Effect of minerals on the stability of biochar.
It is indicated that endogenous minerals could increase biochar stability, and exogenous Fe-bearing minerals had dissimilar effects on different kinds of biochars, which critically regulates the potential of biochar for long-term carbon sequestration.
Evaluation of biochars by temperature programmed oxidation/mass spectrometry
Biochars produced from thermochemical conversions of biomass were evaluated by temperature programmed oxidation (TPO). This technique, used to characterize carbon deposits on petroleum cracking


Influence of production conditions on the yield and environmental stability of biochar
Abstract Biochar, a solid product of biomass pyrolysis, is a promising concept for climate change mitigation and adaptation, as it can sequester atmospheric CO 2 while improving quality of soil where
A method for screening the relative long‐term stability of biochar
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.
Review of the stability of biochar in soils: predictability of O:C molar ratios
Biochar is not a structured homogeneous material; rather it possesses a range of chemical structures and a heterogeneous elemental composition. This variability is based on the conditions of
Characterization of biochars to evaluate recalcitrance and agronomic performance.
Prediction of biochar stability was improved by a combination of volatile matter and H:C ratios corrected for inorganic C, and agronomic utility of biochars is not an absolute value, as it needs to meet local soil constraints.
A review of biochar and its use and function in soil
Abstract Agricultural activities and soils release greenhouse gases, and additional emissions occur in the conversion of land from other uses. Unlike natural lands, active management offers the
Oxidation of Black Carbon by Biotic and Abiotic Processes
Abstract The objectives of this study were to assess the relative importance of either biotic or abiotic oxidation of biomass-derived black carbon (BC) and to characterize the surface properties and
Impact of minerals and alkali metals on willow combustion properties
In the present work the impact of mineral variability on pyrolysis and combustion behaviour has been studied. A willow sample was pre-treated to remove certain minerals and salts by water washing and
Chemical composition and bioavailability of thermally altered Pinus resinosa (Red pine) wood
Abstract The residues remaining after incomplete combustion of vegetation (char) can contribute significantly to the carbon content of soils. Char C is considered biologically inert relative to other
Stability of biomass-derived black carbon in soils
Black carbon (BC) may play an important role in the global C budget, due to its potential to act as a significant sink of atmospheric CO2. In order to fully evaluate the influence of BC on the global
An Assessment of the Benefits and Issues Associated with the Application of Biochar to Soil: A report commissioned by the UK Department for Environment, Food and Rural Affairs and Department of Energy and Climate Change
10 Bruun et al., 2008 Stability Char fractions Dynamic Cereal straw Synthetic environmental charcoal 113 15 Pyrolysis temperature CO2; soil microbial biomass C Labile char fraction is less than 10%