The water hyacinth (WH)-based activated carbon (WHac) has been prepared by an acid treatment, pyrolytic carbonization, and alkali activation processes for using as electrode materials of electrochemical energy storage devices. The pyrolytic carbonization process was performed at a variety of temperature (600, 700, and 800℃) for 2 h. The ash-prepared samples were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), and Brunauer-Emmett-Teller (BET). The benefits of activated carbon with large uniform surface area leading to maximum specific capacitance of 98.3 F⸳g-1 and good cycling stability. Attributed to low-cost make the water hyacinth activated carbon has the potential for use as electrode materials of energy storage devices. Moreover, the decreasing of water hyacinths maintains environmental equilibrium and is sustainable.

This research aimed to study the physical and chemical characteristics of wood charcoals burned using three traditional burning processes, i.e., burning by the clay kiln, the cement kiln and the high temperature kiln. The physical and chemical characteristics of the charcoal samples were studied as follows density, carbon content, application efficiency, general appearance, moisture content, heating value, fire flakes and smoke. Then, the tested results of charcoal samples were compared with the community standard for charcoal production, 658/2547. Moreover, the chemical compositions of samples were also investigated by Energy Dispersive X-ray spectroscopy (EDS). The studied results shown that the amount of compositions elements found in all three charcoal were composed of Carbon, Oxygen and Potassium as the main elements. It was found that the carbon content of charcoal sample burned by the high temperature kiln process was highest as compared to the charcoals obtained from two burning processes.