Modification and Adsorption Properties of Activated Carbon

The adsorption properties of C 2H 4?N 2 and other gases on different kinds of adsorbents were investigated by gravimetric method.It is found that activated carbon,especially activated carbon Ⅲ has high adsorption and selectivity than other adsorbents,which can be used to remove N 2 and recover organic gases from the vent gas of HDPE plant.Three methods were adopted to improve properties of activated carbon.It is shown that adsorption properties can be improved greatly with Cu(NO 3) 2 solution modification,the breakthrough time of C 2H 4 has been prolonged from 26 min to 42 min on modified activated carbon,and recovery of C 2H 4 gases reaches 85%,while the volume percent of N 2 in recovered gases is less than 5%.