Strategies to improve swine manure hydrochar: HCl-assisted hydrothermal carbonization versus hydrochar washing
Entity
UAM. Departamento de Ingeniería QuímicaPublisher
SpringerDate
2023-03-02Citation
10.1007/s13399-023-04027-w
Biomass Conversion and Biorefnery (2023): 1-12
ISSN
2190-6823 (online)DOI
10.1007/s13399-023-04027-wFunded by
Authors greatly appreciate funding from Spain’s MICINN (PID2019-108445RB-I00), MINECO (PDC2021-120755-I00 and TED2021-130287B-I00), Madrid Regional Government (Project S2018/EMT-4344), and Grupo Kerbest Company. R.P. Ipiales acknowledges the fnancial support from the Community of Madrid (IND2019/ AMB-17092) and Arquimea Agrotech CompanyProject
Gobierno de España. PID2019-108445RB-I00; Gobierno de España. PDC2021-120755-I00Editor's Version
https://doi.org/10.1007/s13399-023-04027-wSubjects
Acid-assisted hydrothermal carbonization; Energy recovery; Hydrochar quality; Oxidation profiles; Swine manure; QuímicaRights
© The Author(s) 2023Abstract
The work focuses on the study of hydrochar upgrading from hydrothermal carbonization (HTC) of swine manure by HClassisted HTC or washing with HCl or acetone, as a post-treatment to conventional HTC. Conventional HTC of swine manure
yields a low-quality hydrochar (C content~ 38 wt.%, higher heating value (HHV)~ 15 MJ kg−1, and ash content up to 32
wt.%). HCl-assisted HTC (0.5 M HCl at 230 ℃) substantially reduced the ash content up to ~10 wt.% in the hydrochar and
increased the C content to 58 wt.%, reaching a HHV of 23 MJ kg−1. However, the N and S contents remained at values similar
to those of the swine manure. Washing post-treatment of conventional hydrochars with HCl or acetone signifcantly improved
the C content and the HHV in the range 47–58 wt.% and 19–25 MJ kg−1, respectively, as well as the ash removal with values
7-11 wt.%. Washing the hydrochar with acetone signifcantly reduced the N and S contents, obtaining a carbonaceous material with properties suitable for solid biofuel according to ISO/TS 17225–8, (N<3 wt.%; S<0.15 wt.%; HHV>17 MJ kg−1;
and ash<10 wt.%). Hydrochars obtained by HCl-assisted HTC and HCl/acetone washing post-treatment yielded higher
thermal stability, as well as better reactivity and low ash agglomeration indexes than compared to conventional hydrochars.
Washing post-treatment with acetone proved to be the best strategy to obtain improved hydrochars from swine manure for
industrial use as a solid biofuel
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Google Scholar:Ipiales Macas, Ricardo Paul
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Sarrión Pérez, Andrés
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Díaz Nieto, Elena
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Diaz Portuondo, Emiliano
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Fernández Mohedano, Ángel
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Rubia Romero, María de los Ángeles de la
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