Preparation and Characterization of Activated Carbon from Waste Sawdust from Saw Mill

Abstract

Activated carbon was prepared in laboratory using waste sawdust powder of Shorea robusta (Sal) from saw mill by chemically activated Na2CO3 followed by carbonization technique. Thus prepared activated carbon was characterized by Iodine Number (IN) and Methylene Blue Number (MBN). Iodine number was found to be 534.6 mg/g whereas MBN was found to be 196.08 mg/g which indicated the presence of micropores as well as mesopores in the prepared material. This was also exposed by SEM image. Specific surface area was measured by BET method and was found to be 10.01 m2/g. Then phase state of samples was determined by X-ray diffraction (XRD), which indicated the amorphous nature of the prepared material. The development of surface functionality due to activation was examined by Fourier Transform Infrared Spectroscopy (FTIR) which showed the presence of oxygenated functional groups such as ether, diketone, lactone, phenol on the material. These functional groups are considered to be electrochemically active and contribute to the capacitance of electrical double layer capacitance (EDLC). Further, electrochemical characterization of prepared material was carried out by conductivity test and cyclic voltammetry. The cyclic voltametric curve showed symmetric rectangular shape indicating electrical double layer capacitive behavior. Journal of Institute of Science and TechnologyVolume 22, Issue 2, January 2018, Page: 103-108

Synthesis and characterization of activated carbon derived fromTectona grandissawdust via green route

“…It was performed to estimate the amount of moisture, volatility, ash content and fixed carbon in TGSD 32 . Higher is the content of fixed carbon, better is the adsorption capacity of derived carbon sample 31,34,35 . The assessment of ACTG precursor, that is, TGSD was carried as per protocol given in Reference 36.…”

“…Then, 50 ml of the filtrate was titrated with thiosulfate solution of 0.1 N until the yellow color vanished. After this, 1 ml starch solution was added, followed by dropwise addition of titrant till blue color disappeared 31 . Equation ) was used to estimate the iodine number. where,…”

“…The equipment used to estimate surface area was BET‐analyzer (Nova 3200e, Quntachrome instruments make). The adsorption of nitrogen into the capillary condensation region makes out pore volume ( V p ) 31,38 …”

“…The structure of pores was observed in the micrograph. In the present work, an EDX was done to elucidate the elementary composition of the ACTG 31 …”

“…In the sidelines of the present work, surface and physicochemical characterization have been done to elucidate the elemental and morphological features of ACTG 31 …”