Hydrothermal carbonization of Typha australis

Hydrothermal carbonization of Typha australis: Influence of stirring rate

Abdeldayem, O.M.H.M. (TU Delft Sanitary Engineering; IHE Delft Institute for Water Education)
Al Noman, Md Abdullah (IHE Delft Institute for Water Education)
Dupont, Capucine (IHE Delft Institute for Water Education)
Ferras, David (IHE Delft Institute for Water Education)
Grand Ndiaye, Lat (Assane Seck University of Ziguinchor)
Kennedy, M.D. (TU Delft Sanitary Engineering; IHE Delft Institute for Water Education)

2023

According to existing literature, there are no conclusive results on the impact of stirring on hydrothermal carbonization (HTC); some studies report a significant impact on the product's properties, while others indicate no influence. This study investigates the influence of stirring rate on several responses and properties of HTC products, including solid mass yield, solid carbon fraction, surface area, surface functional groups, morphology, and the fate of inorganic elements during HTC. Waste biomass was introduced as a feedstock to a 2 L HTC reactor, where the effects of temperature (180–250 °C), residence time (4–12 h), biomass to water (B/W) ratio (1–10%), and stirring rate (0–130 rpm) were investigated. The findings of this study conclusively indicated that the stirring rate does not influence any of the studied responses or properties of hydrochar under the selected experimental conditions used in this study. Nevertheless, the results indicated that a low-stirring rate (5 RPM) is enough to slightly enhanced the heating-up phase of the HTC reactor. For future research, it is recommended to examine the impact of stirring rate on the HTC of other types of biomass using the methodology developed in this study.

Hydrochar
Hydrothermal carbonization
Lignocellulosic biomass
Response stirring rate
Surface methodology
Typha australis

http://resolver.tudelft.nl/uuid:22747fb7-8b4b-4bd8-9ac7-a4d6235df651

https://doi.org/10.1016/j.envres.2023.116777

0013-9351

Environmental Research, 236 (2)

Institutional Repository

journal article

© 2023 O.M.H.M. Abdeldayem, Md Abdullah Al Noman, Capucine Dupont, David Ferras, Lat Grand Ndiaye, M.D. Kennedy