Patent ID: 6309446
Filing Date: 2001-10-30
Classification: B01J,F17C

Abstract:
A process for storing and delivering a gas comprising a step of contacting a prescribed amount of a gaseous hydrogenated compound or a gaseous halogenated compound with activated carbon to store said gaseous compound by adsorption on said activated carbon at a pressure lower than the atmospheric pressure; and a step of desorbing at least a part of said gaseous compound, once adsorbed, from said activated carbon by withdrawing to a negative pressure to deliver said gaseous compound, wherein said activated carbon comprises a granular carbon formed body consisting of carbonized and activated grains of phenol resin powder bound to each other, and has a specific surface area of from about 700 to about 1,500 m.sup.2 /g, a pore volume of pores having a pore diameter of 10 nm or less of from about 0.20 to about 0.80 cc/g, a proportion of a pore volume of pores having a pore diameter of from about 0.6 to about 0.8 nm to a pore volume of pores having a pore diameter of 10 nm or less of 75% by volume or more, a grain bulk density of from about 0.4 to about 1.1 g/cc, a packing density of from 0.30 to 0.70 g/cc, an ash content of 1.0% or less, and a tensile strength of activated carbon grains of 30 kg/cm2 or more.