Synthesis and characterization of hydrochar derived from waste material

Loh Kai Pin (2022) Synthesis and characterization of hydrochar derived from waste material. Universiti Malaysia Sabah. (Unpublished)

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Abstract

Agricultural waste management is one of the popular issues of waste management. This research focuses on the synthesis of hydrochar using waste material with relatively simpler, cheaper and more environmentally friendly technique which is hydrothermal carbonization treatment. There is no pre-treatment of the precursors involved in this treatment. The precursor used in this research is sawdust which is low cost, discarded source and can be obtained from UMS Faculty of International Tropical Forestry. In this research, sawdusts were heated through hydrothermal carbonization treatment at the temperature of 160°C, 180°C and 200°C by 2 hours for set 1. Besides that, there is another one sample added in set 1 which is heated through heat treatment at the temperature of 200°C by 2 hours. For set 2, sawdusts were heated through hydrothermal carbonization treatment at the same temperature of 200°C by difference residence time of 2 hours, 3 hours and 4 hours. Then, the product after heated is hydrochar. The hydrochar’s structure and morphology, elemental composition, UV absorbance and efficiency were characterized using Scanning Electron Microscopy (SEM), Energy Dispersive X-ray Spectroscopy (EDX), Ultraviolet-Visible Spectroscopy (UV-Vis) and Solar Vapor Generation. The hydrochars are observed to show wood chip like structure under SEM. For the elemental composition, the carbon content of the hydrochars are between 74.97% and 79.85%. The hydrochars heated at 200°C has a higher UV absorbance than the hydrochars heated at 160°C and 180°C and carbonized sawdust heated at 200°C. For the solar vapor generation, the average efficiency of the hydrochars and carbonized sawdust are between 42.59% and 66.59%. The hydrochar heated at 200°C by 4 hours (HC200-4) was chosen as the best hydrochar within the hydrochars, because of its black color properties and the highest carbon content. Besides that, HC200-4 has the stable UV absorbance between the range of wavelength. Lastly, HC200-4 has an average efficiency of 63.67% which considered as high efficiency compared to the other hydrochar.

Item Type:	Academic Exercise
Keyword:	Agricultural , Waste , Synthesis of hydrochar
Subjects:	T Technology > TD Environmental technology. Sanitary engineering > TD1-1066 Environmental technology. Sanitary engineering > TD783-812.5 Municipal refuse. Solid wastes
Department:	FACULTY > Faculty of Engineering
Depositing User:	DG MASNIAH AHMAD -
Date Deposited:	11 Oct 2022 12:18
Last Modified:	11 Oct 2022 12:18
URI:	https://eprints.ums.edu.my/id/eprint/34401

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