Synthetic Carbons Derived from a Styrene—Divinylbenzene Copolymer Using Phosphoric Acid Activation

Activated carbons were obtained by phosphoric acid activation of a porous chloromethylated and sulphonated styrene—divinylbenzene copolymer in two different atmospheres (argon and air) at various temperatures in the range 400–1000°C. The development with activation temperature of several characteristic parameters of the resulting carbons, i.e. bulk density, yield, surface area, meso-, micro- and ultra-micropore volumes, and cation-exchange capacity, was examined. All these parameters were recalculated relative to the volume of adsorbent (to obtain their practical effectiveness) and then related to the same quantity of precursor (to yield their economic efficiency). It is concluded that the carbons obtained in an argon atmosphere exhibit some practical advantages over those obtained in air regarding cation adsorption, although those obtained in air at low temperatures may represent an interesting alternative

Impact of the Carbonization Atmosphere on the Properties of Phosphoric Acid-Activated Carbons from Fruit Stones

Activated carbons were obtained by phosphoric acid activation of a mixture of fruit stones (apricot and peach) in two different atmospheres (argon and air) at various temperatures in the 400–1000°C range. The evolution of several characteristic parameters of the resulting carbons (bulk density, yield, BET surface area, ultramicropore, supermicropore and mesopore volumes and cation-exchange capacity) with activation temperature was examined. The above parameters were re-calculated on a volume basis (practical effectiveness) and a volume-yield basis (economic efficiency). It was concluded that carbons obtained in an argon atmosphere exhibit some practical advantages over those obtained in air regarding cation adsorption, although those obtained in air may represent an interesting alternative regarding porous structure

Removal of volatile toxic trace elements in flue gases from coal combustion

Trabajo presentado al ECSC Workshop: "Reduction of emissions from coal utilization", celebrado en Sevilla (España) del 30 al 31 de marzo de 2000.Peer reviewe