Results of Chemical Activation of Biochar Obtained by the Method of Accelerated Hydrothermal Carbonization of Sewage Sludge

An investigation has been made into accelerated hydrothermal fluidized carbonization of sewage sludge in a superheated steam medium. It is shown that an increase in the process temperature has no effect on its duration but has a significant effect on the composition of noncondensable gases. Biochar...

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Bibliographic Details
Published in:Journal of engineering physics and thermophysics 2021-11, Vol.94 (6), p.1557-1562
Main Authors: Muratova, N. S., Is’emin, R. L., Melezhik, A. V., Kuz’min, S. N., Nebyvaev, A. V., Mikhalev, A. V., Milovanov, O. Yu, Kokh-Tatarenko, V. S., Teplitskii, Yu. A., Buchilko, É. K., Pitsukha, E. A., Greben’kov, A. Zh
Format: Article
Language:English
Subjects:
Carbonization
Classical Mechanics
Complex Systems
Composition effects
Engineering
Engineering Thermodynamics
Fluidizing
Heat and Mass Transfer
Hydroxides
Industrial Chemistry/Chemical Engineering
Methods
Noncondensable gases
Potassium hydroxides
Sewage sludge
Sludge
Soil improvement
Thermodynamics
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Summary:An investigation has been made into accelerated hydrothermal fluidized carbonization of sewage sludge in a superheated steam medium. It is shown that an increase in the process temperature has no effect on its duration but has a significant effect on the composition of noncondensable gases. Biochar activation has been investigated in potassium hydroxide at a temperature of 750°C and the biochar–KOH ratios of 1:1.5, 1:2, and 1:3. It is shown that the KOH concentration has no effect, in practice, on the sorption characteristics of the obtained product which is more suitable for the use as a soil improver.
ISSN:1062-0125
1573-871X
DOI:10.1007/s10891-021-02436-0