Patent ID: 6743278
Filing Date: 2004-06-01
Classification: B01D,B01J,F17C,Y02C,Y02E,Y10S,Y10T

Abstract:
A method of storing and dispensing a gas, comprising: fabricating a gas storage and dispensing vessel; disposing a physical adsorbent in the vessel having sorptive affinity for said gas; charging said gas to said vessel for adsorption on said physical adsorbent; sealing said vessel with a valve head containing an actuatable valve, to enclose the physical adsorbent and adsorbed gas, and isolate same from an exterior environment of the vessel; desorbing the adsorbed gas from the physical adsorbent, and actuating the actuatable valve in the valve head, to flow gas from the vessel and through the actuatable valve, for gas dispensing; wherein the physical adsorbent is characterized by at least one of the following characteristics:(a) a fill density measured for arsine gas at 25Â° C. and pressure of 650 torr that is greater than 400 grams arsine per liter of adsorbent; (b) at least 30% of overall porosity of said adsorbent comprising slit-shaped pores having a size in a range of from about 0.3 to about 0.72 nanometer, and at least 20% of the overall porosity comprising micropores of diameter <2 nanometers; and (c) a bulk density of from about 0.80 to about 2.0 grams per cubic centimeter.