Abstract
Adsorption characteristic study of different activated carbon samples are performed at low temperature down to 5 K by using cryocooler based low temperature facility with a micropore analyzer. This facility is now operational at Institute for plasma research (IPR). It comprises of a commercial micro pore analyzer for sample characterization at 77 K and a GM cryocooler cooling unit forholding the sample at any temperature < 77 K. The sample holder is connected to the micro-pore analyzer measurement unit through a small diameter tube for gas dosing and equilibrium pressure measurement. A PID control based temperature controller unit along with temperature sensors and heatersare used to regulate and maintain the temperature of the sample cell at any temperature between 4.5 K and 77 K. Among different kinds ofactivated carbon samples studied, the surface area and pore width for carbon cloths are found to be 3438 m2/gm (at 4.5 K), and it increases with lowering the temperature down to 4.5 K from 77.0 K.
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