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| Titel |
Characterization of hydrochars produced by hydrothermal carbonization of rice husk |
| VerfasserIn |
D. Kalderis, M. S. Kotti, A. Méndez, G. Gascó |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1869-9510
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| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 5, no. 1 ; Nr. 5, no. 1 (2014-06-11), S.477-483 |
| Datensatznummer |
250115280
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| Publikation (Nr.) |
 copernicus.org/se-5-477-2014.pdf |
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| Zusammenfassung |
| Biochar is the carbon-rich product obtained when biomass, such as wood,
manure or leaves, is heated in a closed container with little or no
available air. In more technical terms, biochar is produced by so-called
thermal decomposition of organic material under limited supply of oxygen
(O2), and at relatively low temperatures (< 700 °C).
Hydrochar differentiates from biochar because it is produced in an aqueous
environment, at lower temperatures and longer retention times. This work
describes the production of hydrochar from rice husks using a simple, safe
and environmentally friendly experimental set-up, previously used for
degradation of various wastewaters. Hydrochars were obtained at 200 °C and 300 °C and at residence times ranging from 2 to 16 h. All samples
were then characterized in terms of yield, surface area, pH, conductivity
and elemental analysis, and two of them were selected for further testing
with respect to heating values and heavy metal content. The surface area was
low for all hydrochars, indicating that porous structure was not developed
during treatment. The hydrochar obtained at 300 °C and 6 h residence
times showed a predicted higher heating value of 17.8 MJ kg−1, a fixed carbon
content of 46.5% and a fixed carbon recovery of 113%, indicating a
promising behaviour as a fuel. |
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