Preparation and characterization of activated carbon from chickpea stalk by chemical activation
Keywords:
Chickpea stalk, Activated carbon, Chemical activation, Iodine value, Methylene blue value, Specific surface areaAbstract
The research was conducted to valorize the raw chickpea stalk by producing activated carbon. Activated carbon was produced through a process of chemical activation utilizing potassium hydroxide (KOH), conducted at 750 °C in an environment of nitrogen (N2) gas. The BET surface area, scanning electron microscopy (SEM), proximate analysis, elemental analysis, Adsorption analysis, and calorific value of raw chickpea stalk and activated carbon were investigated and critically compared. The finding showed that the specific surface area, total pore volume, methylene blue value, and iodine value were 1176 m2/g, 0.5 cm3/g, 315 mg/g, and 368 mg/g, respectively. The synthesized activated carbon had high porosity. The pores were interconnected like a honeycomb structure as investigated by scanning electron microscopy analysis. Thus, it was concluded that the raw chickpea stalk was valorized by thermochemical activation, and enhancement in activated carbon properties was achieved. The activated carbon can be used for dye removal, water purification, gas storage, etc.
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