Chemical and structural properties of carbonaceous products obtained by pyrolysis and hydrothermal carbonisation of corn stover
By A. B. Fuertes, M. C. Arbestain, M. Sevilla, J. A. Macia-́Agullo, S. Fiol, R. López, R. Smernik, W. Aitkenhead, F. Arce, F. Macías. 2010
383 citations recorded by the source corpus.
The main properties of chars produced from corn stover, either by pyrolysis at 550°C (to produce biochar) or by hydrothermal carbonisation (to produce hydrochar), were studied. Carbonaceous materials were characterised by: SEM imaging, solid-state 13C NMR, FT-IR, Raman spectroscopy, and XPS. The following parameters were determined: elemental composition, cation exchange capacity, acid groups contents, BET, and yield. The hydrochar had a low ash content and low pH (4.7); recovery of C was high (57%), although only about half of the C was aromatic. Atomic O/C and H/C ratios in the hydrochar were higher than in the biochar. The same pattern was observed for the estimated concentration of carboxylic functional groups (0.07 compared with 0.04 mol/kg). The biochar had higher ash content than the hydrochar, and also higher pH (~10) (lime equivalence ~40 kg CaCO3/t). The C recovery (46%) was lower than in the hydrochar, although most of the C recovered was aromatic. Both chars could be used as soil amendments, for very different requirements. Soil responses and the residence times of the chars (especially the hydrochar) must be studied in detail to pursue long-term C sequestration.
Subfields: Biomaterials, Biomedical Engineering, Geochemistry and Petrology
View Paper: https://www.semanticscholar.org/paper/205398029b8451726670658e87088df3b4d7b203
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Citations in the corpus
- Application of biochar for the removal of pollutants from aqueous solutions. (2015, neutral): “It is reported that the majority of biochars produced by hydrothermal carbonization were more acidic than biochars produced by pyrolysis (Fuertes et al., 2010; Kumar et al., 2011; Kalderis et al., 2014).”
- Adsorption of copper and zinc by biochars produced from pyrolysis of hardwood and corn straw in aqueous solution. (2011, methodology): “This was likely the result of differences in both the feedstocks and pyrolysis conditions: Demirbas (1997) and Fuertes et al. (2010) found that the C content was higher in hardwood than corn stover, while Chun et al. (2004) and Chen et al. (2008) demonstrated that the C content increased with…”
- Biochar: Carbon Sequestration, Land Remediation, and Impacts on Soil Microbiology (2012, methodology): “Also, hydrothermal material produced from corn stover (Fuertes et al., 2010) and cherry wood (unpublished results from our laboratory) has a relatively high proportion of aliphatic and carboxy/carbonyl functionality; features expected to increase biological and chemical decomposition rates.”
- Biochar: a synthesis of its agronomic impact beyond carbon sequestration. (2012, background): “…torrefaction and hydrothermal carbonization are not optimal choices for biochar production because the oxygen to carbon (O/C) ratio of the resulting charred material is high (between 0.4 and 0.6) (Bridgeman et al., 2008), indicating lower aromatic character in the biochar (Fuertes et al., 2010).”