Activated Carbon Prepared from Date Pits for the Retention of NO 2 at Low Temperature

Activated carbons were prepared from date pits by physical activation with CO 2 and the textural properties were investigated by BET and D-R methods with N 2 and CO 2 adsorption isotherms. The interaction of the NO 2 with activated carbon was examined at ambient temperature and the effect of operating conditions such as temperature and inlet gas compositions was also examined. It was observed that the development of porosity with increasing time of activation favours the adsorption capacity of NO 2 . The maximum adsorption capacity reached was about 107 mg/g, which is higher than several activated carbon prepared from classical lignocellulosic biomass. However, a slight decrease of NO 2 adsorption capacity was observed with increasing temperature. The addition of oxygen into the inlet gas gave rise to an increase in amount adsorbed of NO 2 .