Experimental runs were done to estimate the adsorption characteristics of granular activated
carbon (GAC)/R134a pair. A laboratory scale test rig was designed and built to run the
experiments. The adsorption capacity of the GAC was studied at different temperatures
25 C, 35 C, 45 C and 65 C. Pressure and time were recorded during the experiments. The
maximum adsorption capacity was found to be 1.68 kgR134a kgcarbon
 at 25 C after 1000 s.The activation energy and the exponential constant were estimated to be 9575 J mol1 and 1.83 respectively.