Abstract:
A germane storage and dispensing system, in which germane gas is sorptively retained on an activated carbon sorbent medium in a vessel containing adsorbed and free germane gas. The activated carbon sorbent medium is deflagration-resistant in relation to the germane gas adsorbed thereon, i.e., under deflagration conditions of 65 °C and 650 torr, under which free germane gas undergoes deflagration, the activated carbon sorbent medium does not sustain deflagration of the adsorbed germane gas or thermally desorb the germane gas so that it undergoes subsequent deflagration. The deflagration-resistance of the activated carbon sorbent medium is promoted by pre-treatment of the sorbent material to remove extraneous sorbables therefrom and by maintaining the fill level of the sorbent medium in the gas storage and dispensing vessel at a substantial value, e.g., of at least 30 %.
Abstract:
A method and apparatus for manufacture of carbon nanotubes, in which a substrate is contacted with a hydrocarbonaceous feedstock containing a catalytically effective metal to deposit the feedstock on the substrate, followed by oxidation of the deposited feedstock to remove hydrocarbonaceous and carbonaceous components from the substrate, while retaining the catalytically effective metal thereon, and contacting of the substrate having retained catalytically effective metal thereon with a carbon source material to grow carbon nanotubes on the substrate. The manufacture can be carried out with a petroleum feedstock such as an oil refining atmospheric tower residue, to produce carbon nanotubes in high volume at low cost. Also disclosed is a composite including porous material having single-walled carbon nanotubes in pores thereof.
Abstract:
A fluid storage and dispensing system (10) comprising a vessel (12) for holding a fluid (17) at a desired pressure. The vessel has a pressure regulator (26) set at a predetermined pressure. The regulator may be interiorly or exteriorly positioned, single-staged or multi-staged, and is associated with a port of the vessel. A dispensing assembly, e.g., including a flow control means such as a valve (20), is arranged in gas/vapor flow communication with the regulator (26), whereby the opening of the valve effects dispensing of gas/vapor from the vessel (12). The fluid in the vessel may be constituted by a liquid that is confined in the vessel at a pressure in excess of its liquefaction pressure at prevailing temperature conditions, e.g., ambient (room) temperature.
Abstract:
An improved, non-plasma, static method for removing accumulated films and solid residues from interior surfaces of processing chambers used in thermal or plasma CVD treatment processes. The method includes introducing a reactive substance into a processing chamber while adjusting the pressure within the processing chamber to a predetermined level. The flow of the reactive substance into the processing chamber is terminated and the reactive substance is retained in the processing chamber to react with solid residues and form reaction products, following which the reaction products are subsequently removed from the processing chamber. Advantageously, terminating the flow of reactive substance into the processing chamber results in etching action that more effectively utilizes the cleaning agent and generates less hazardous materials.
Abstract:
A gas storage and dispensing system (10) includes a dispenser container (12) holding a physical sorbent material (16) having sorptive affinity for (i) a sorbable dispensing gas to be held in and subsequently selectively discharged from container (12), and (ii)extraneous sorbables, in which sorbent material (16) having extraneous sorbables sorbed thereon, is treated to desorb at least part of the extraneous sorbables therefrom. The treated sorbent material (16) is loaded in container (12), sorbable dispensing gas is introduced into container (12), for physical sorption of the dispensing gas on the sorbent material (16) and container (12) holding the dispensing gas on the sorbent material (16) is sealed, so that container (12) thereafter contains the dispensing gas in a high purity form, available for selective dispensing by desorption and discharging of the dispensing gas from container (12).
Abstract:
An adsorption structure is described that includes at least one adsorbent member formed of an adsorbent material and at least one porous member provided in contact with a portion of the adsorbent member to allow gas to enter and exit the portion of the adsorbent member. Such adsorption structure is usefully employed in adsorbent-based refrigeration systems. A method also is described for producing an adsorbent material, in which a first polymeric material is provided having a first density and a second polymeric material is provided having a second density, in which the second polymeric material is in contact with the first polymeric material to form a structure. The structure is pyrolyzed to form a porous adsorbent material including a first region corresponding to the first polymeric material and a second region corresponding to the second polymeric material, in which at least one of the pore sizes and the pore distribution differs between the first region and the second region.
Abstract:
A method and apparatus for manufacture of carbon nanotubes, in which a substrate is contacted with a hydrocarbonaceous feedstock containing a catalytically effective metal to deposit the feedstock on the substrate, followed by oxidation of the deposited feedstock to remove hydrocarbonaceous and carbonaceous components from the substrate, while retaining the catalytically effective metal thereon, and contacting of the substrate having retained catalytically effective metal thereon with a carbon source material to grow carbon nanotubes on the substrate. The manufacture can be carried out with a petroleum feedstock such as an oil refining atmospheric tower residue, to produce carbon nanotubes in high volume at low cost. Also disclosed is a composite including porous material having single-walled carbon nanotubes in pores thereof.
Abstract:
A system (10) including a reagent supply container (12) in which a vessel (14) holds a composition including a chemical reagent dissolved or dispersed in a storage liquid (18) that is reversibly interactive with the chemical reagent to store the chemical reagent therein, and an ultrasonic energy source (19, 32, 34) adapted to introduce ultrasonic energy into the composition to liberate the chemical reagent therefrom for dispensing from the vessel of the reagent supply container. The ultrasonic energy source can be internally provided in the container, or may be provided as part of an external ultrasonic energy impingement unit (112), in which the stored chemical reagent, e.g., a microelectronic device manufacturing reagent, is extracted from the liquid storage medium for transport to a reagent-utilizing process or facility (38). The liquid storage medium may for example include an ionic liquid with which the chemical reagent is reversibly taken up, and subsequently released under ultrasonic energy exposure dispensing conditions.
Abstract:
A gas supply package, including a material storage and gas dispensing vessel defining an interior volume adapted to hold source material for the gas, with a gas dispensing stick in the interior volume. The gas dispensing stick includes at least one regulator coupled with a flow passage, with at least one generally planar filter element arranged to filter gas flowed through the flow passage prior to its flow through the regulator(s). The flow passage and the at least one generally planar filter element are arranged to produce: (i) a change in gas flow conductance in the vicinity of the filter element, and/or (ii) a direction of flow of gas at a non-zero angle with respect to the longitudinal axis of the vessel and/or to the longitudinal axis of the flow passage, for enhancement of capture efficiency of said filter element.
Abstract:
An adsorption structure is described that includes at least one adsorbent member formed of an adsorbent material and at least one porous member provided in contact with a portion of the adsorbent member to allow gas to enter and exit the portion of the adsorbent member. Such adsorption structure is usefully employed in adsorbent-based refrigeration systems. A method also is described for producing an adsorbent material, in which a first polymeric material is provided having a first density and a second polymeric material is provided having a second density, in which the second polymeric material is in contact with the first polymeric material to form a structure. The structure is pyrolyzed to form a porous adsorbent material including a first region corresponding to the first polymeric material and a second region corresponding to the second polymeric material, in which at least one of the pore sizes and the pore distribution differs between the first region and the second region.