Hydrothermally derived hydrochar from waste sawdust for solar vapor generation

Wong, Min Jin Karen and Wang, Zhipeng and Bih Lii Chua and Willey Y. H. Liew and Gan Jet Hong Melvin (2024) Hydrothermally derived hydrochar from waste sawdust for solar vapor generation. Energy Technology, 12. pp. 1-10. ISSN 2194-4288

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Abstract

Herein, hydrochar is derived from abundant and low-cost waste sawdust using hydrothermal carbonization in distilled water with a series of temperatures (150, 200, and 250 °C) and time (2 and 3 h), where the hydrochar characteristics are evaluated toward its application as a solar absorber. The hydrochar-based solar absorber is fabricated and tested using outdoor solar vapor generation under direct solar radiation with an average solar intensity of 1.26 kW m−2. The solar absorber incorporated with hydrochar is derived at 250 °C for 3 h and displays the best average efficiency (71.35 ± 0.90%) and evaporation rate (1.30 ± 0.04 kg m−2 h−1). The collected clean water salinity (below 300 ppm) and pH (6.72–7.23) from the solar absorber is within the safe drinking water limit by the World Health Organization. Therefore, the hydrochar-based solar absorber can be used to generate clean water from seawater desalination using solar vapor generation.

Item Type:	Article
Keyword:	Clean water, Hydrothermal, Solar absorber, Solar evaporation
Subjects:	G Geography. Anthropology. Recreation > GB Physical geography > GB3-5030 Physical geography > GB651-2998 Hydrology. Water > GB980-2998 Ground and surface waters > GB1001-1199.8 Groundwater. Hydrogeology T Technology > TD Environmental technology. Sanitary engineering > TD1-1066 Environmental technology. Sanitary engineering > TD201-500 Water supply for domestic and industrial purposes > TD429.5-480.7 Water purification. Water treatment and conditioning. Saline water conversion
Department:	FACULTY > Faculty of Engineering
Depositing User:	JUNAINE JASNI -
Date Deposited:	08 Aug 2025 15:30
Last Modified:	08 Aug 2025 15:30
URI:	https://eprints.ums.edu.my/id/eprint/44778

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