Characterization and Correlation of Methylene Blue Adsorption Efficiency in Periwinkle and Coconut Shell-Derived Carbons for Efficient CO and CO Capture
Abstract
Human nefarious activities, eminently contributes to the increasing concentration of greenhouse gases globally specifically CO2 levels; therefore, this study determines the adsorption capacity from activated carbons produced from aquatic (periwinkle shell) and agricultural (coconut shell) waste by employing methylene blue adsorption test as compared to IUPAC Standard of the products micropores and mesopores for possible carbon dioxide (CO2) and carbon monoxide (CO) capture. These wastes were activated at temperatures (400, 500, 600 0C) and carbonized at temperatures (500, 600, 700 0C) at 30 minutes intervals (30, 60 and 90). At 60 minutes of activation and carbonization temperatures (500 and 600 700 0C), recorded the highest fixed carbons and yields for coconut (48, 49 %) and periwinkle (52, 51 %) respectively. On percentage comparison moisture and ash contents for coconut (55, 29 %), periwinkle (45, 71 %) while their volatile matters was 55 and 45 %. In the subjection of products to MBAT at the same recorded time (30, 60 and 90 minutes), activation and carbonization temperatures (400, 500, 600 0C) and (500, 600, 700 0C) the adsorption capacities of coconut AC recorded 1.90, 2.68, 2.44 mg/g and periwinkle yielded 1.98, 2.88, 2.46 mg/g. The coconut AC achieved a maximum adsorption of 2.68 mg/g (48 %) and periwinkle AC demonstrated a higher peak performance of 2.88 mg/g (52 %) proving their pores evolution and IUPAC Standardization indicated transition from microporous (< 2 nm) to mesoporous (2–50 nm) structures marketing these products as possible, effective and efficient CO2 and CO captures.
Keywords
PeriwinkleCoconutProductsActivated Carbon (AC)AdsorptionCapacityMicroporesMesopores MBAT etc.
References
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