Extraction of Activated Carbon and Silica from Rice Husk

Abstract

The activated carbon and silica have been aiming to extract from rice husk to convert agro waste into useful product at various calcination temperatures and processing time. The obtained were analysed by SEM, BET, EDS and XRD. The various properties of activated carbon and silica at all operating conditions were reported. These properties include surface area, pore volume and surface morphology, etc. The maximum 74.63% weight and 72% weight of activated carbon were obtained for the observation time 14 hours and 12 hours respectively. The processing time of 14 hours and the processing temperature as 100°C are optimised for activated carbon. The BET surface area, total pore volume and average pore size of the activated carbon are found as 4.683m2/g, 8.886cm3/g and 7.590nm respectively. For silica, the calcination tempratures were choosen as 400, 500, 600, 700 and 800 for the present work. The temperature 500°C and above was found as optimum for obtaining regular particle size. The EDS confirmed 100% silica as product at all the temperature and processing time. The XRD analysis of obtained silica is shown that the silicon is also present along with silica. The BET surface area, total pore volume and average pore size of the silica are 280.68 m2/g, 0.6553 cm3/g and 9.339nm respectively.