PREPARATION AND CHARACTERIZATION OF PORE STRUCTURE BY PHOSPHORIC ACID ACTIVATED CARBON FROM UNUSED WOOD OF CITRUS SHRUB

Abstract

Present study aimed to prepared large surface area activated carbon from unused wood of citrus with 45%w/w concentration of phosphoric acid as activating agent after maintaining optimum condition related to activation time of 25- minute, activation temperature at 550˚C and impregnation ratio 4:1 during chemical activation process by means of two stage process. The effect of optimum condition related to activation parameter was studied, the surface and pore structure of activated carbon was characterized by nitrogen adsorption isotherm method. The pore and surface properties of the resultant carbon including Langmuir surface area, BET surface area, pore size distribution, micropore volume and average pore radius were identified by nitrogen adsorption isotherm data using the BET, DFT, DA and BJH method. BET surface area, Langmuir surface area, micropore volume and average pore radius were obtained as high as 649m2/g, 3015m2/g, 0.34cc/g and 1.34 nm respectively which exhibit resultant carbon has high surface area and with welldeveloped micropores.