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Erschienen in: Biomass Conversion and Biorefinery 1/2024

07.02.2022 | Original Article

Physicochemical characteristics and combustion reactivity of reed stalk hydrochar obtained under dilute black liquor condition

verfasst von: Xiangyuan Dong, Shuqing Guo, Shuo Li, Chen Cheng, Yuyang Wu

Erschienen in: Biomass Conversion and Biorefinery | Ausgabe 1/2024

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Abstract

Hydrothermal carbonization (HTC) of biomass is a promising technology for generating value-added products. To reduce expenditure of pure water, reed stalk (RS) was hydrothermally treated under dilute black liquor condition. The physicochemical and combustion properties of RS hydrochars were investigated. The results showed that the coalification degree of hydrochar was improved significantly with increasing of hydrothermal temperature and residence time. The upgrading of coalification degree was attributed to the increment of C content and the reduction of the O, H contents of hydrochar under the reactions of dehydration and decarboxylation. With increasing the coalification degree of hydrochar, the HHV and the energy densification of hydrochar increased. And the energy recovery rate of hydrochar decreased due to the reduction of mass yield. The thermogravimetric results revealed that the mean combustion reactivity of hydrochar at the stage of volatile matter combustion was found to decrease with increasing the coalification degree of hydrochar. The relative sensitivities of mean combustion reactivities to heating rate were also associated with the coalification degree of hydrochar. The research showed that the RS could be transformed into value-added fuel by HTC under dilute black liquor condition. It provides an alternative method to reduce expenditure of HTC process water.

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Literatur
Metadaten
Titel
Physicochemical characteristics and combustion reactivity of reed stalk hydrochar obtained under dilute black liquor condition
verfasst von
Xiangyuan Dong
Shuqing Guo
Shuo Li
Chen Cheng
Yuyang Wu
Publikationsdatum
07.02.2022
Verlag
Springer Berlin Heidelberg
Erschienen in
Biomass Conversion and Biorefinery / Ausgabe 1/2024
Print ISSN: 2190-6815
Elektronische ISSN: 2190-6823
DOI
https://doi.org/10.1007/s13399-022-02394-4

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