摘要:
A system and process for generating and packaging phosphine gas, in which the process includes: reacting water and aluminum phosphide to generate phosphine, and providing the phosphine in a gas mixture at a phosphine concentration below a lower explosive limit; adsorptively removing phosphine from the gas mixture; and packaging the removed phosphine in a fluid storage and dispensing vessel.
摘要:
An article (130) comprising a non-conductive substrate (136), preferably of an environment degradeable character, having a thickness of an oxidizable metal coating thereon, and optionally an oxidation enhancingly effective amount of a salt (140) e.g. from about 0.005 to about 25 % by weight of salt, based on the weight of oxidizable metal, present on the oxidizable metal coating. Also disclosed is a related method of forming such article, comprising chemical vapor depositing the oxidizable metal coating on the substrate. When utilized in a form comprising fine-diameter substrate elements such as filaments, the resulting product may be usefully employed as an 'evanescent' chaff. In the presence of atmosphere moisture, such evanescent chaff undergoes oxidation of the oxidizable metal coating so that the conductivity and radar absorbance/reflectance characteristics of the chaff transiently decays.
摘要:
A system and method for recovering high value gas from a process stream, material or environment containing same, e.g., xenon by contacting gas from the process stream, material or environment with a carbon adsorbent effective to sorptively capture same, free of or with reduced concentration of fluid species present with the high value gas in the high value gas-containing gas in the process stream, material or environment. Other aspects of the disclosure include a radon detection method and product.
摘要:
A system and method for recovering high value gas from a process stream, material or environment containing same, e.g., xenon by contacting gas from the process stream, material or environment with a carbon adsorbent effective to sorptively capture same, free of or with reduced concentration of fluid species present with the high value gas in the high value gas-containing gas in the process stream, material or environment. Other aspects of the disclosure include a radon detection method and product.
摘要:
A chemical storage and dispensing vessel having associated therewith a colorimetric member that is effective to change color in exposure to leakage of a gas contained in the vessel. The colorimetric member may be constituted by a film, e.g., of a shrink-wrap character, that contains or is otherwise associated with a colorimetric agent undergoing color change in exposure to fluid leaking from the vessel. Such shrink-wrap film may be applied to a portion of the vessel susceptible to leakage, or alternatively to the entire vessel, so that the film is colorimetrically effective to indicate the occurrence of a leakage event by visually perceptible change of color.
摘要:
A particulate form carbon pyrolyzate adsorbent, having the following characteristics: (a) CO 2 capacity greater than 105 cc/gram at one bar pressure and temperature of 273° Kelvin; (b) CO 2 Working Capacity greater than 7.0 weight percent; (c) CO 2 heats of adsorption and desorption each of which is in a range of from 10 to 50 kJ/mole; and (d) a CO 2 /N 2 Henry's Law Separation Factor greater than 5. The carbon pyrolyzate material can be formed from a polyvinylidene chloride-based polymer or copolymer, or other suitable resin material, to provide an adsorbent that is useful for carbon dioxide capture applications, e.g., in treatment of flue gases from coal-fired power generation plants.
摘要:
A chemical storage and dispensing vessel (12) having associated therewith a colorimetric member (32) that is effective to change color in exposure to leakage of a gas contained in the vessel. The colorimetric member may be constituted by a film, e.g. , of a shrink-wrap character, that contains or is otherwise associated with a colorimetric agent undergoing color change in exposure to fluid leaking from the vessel. Such shrink-wrap film may be applied to a portion of the vessel (12) susceptible to leakage, or alternatively to the entire vessel, so that the film is colorimetrically effective to indicate the occurrence of a leakage event by visually perceptible change of color.
摘要:
Multi-stage abatement systems and methods of use to remove final traces of pollutants and hazardous substances such as fluorinated species from effluents generated by semiconductor manufacturing operations. The effluent is treated in a main abatement tool, in combination with a secondary polishing scrubber that utilizes a high efficiency abatement technique to remove the final traces of pollutants from the effluent gas. The polishing scrubber can utilize treatment units such as high retention time scrubber vessels, recirculating post scrubber beds, dry post scrubbers, catalytic systems for OF2 abatement, and/or UV radiation systems for OF2 abatement.
摘要:
A system and process for generating and packaging phosphine gas, in which the process includes: reacting water and aluminum phosphide to generate phosphine, and providing the phosphine in a gas mixture at a phosphine concentration below a lower explosive limit; adsorptively removing phosphine from the gas mixture; and packaging the removed phosphine in a fluid storage and dispensing vessel.
摘要:
A carbon adsorbent having the characteristics of: a nitrogen micropore volume at 77°K, measured as liquid capacity, that is greater than 0.30 mL/g; a neopentane capacity measured at 273°K and 1 bar, measured as liquid capacity, that is less than 7% of the nitrogen micropore volume, measured as liquid capacity; and an access pore size in a range of from 0.50 to 0.62 nm. Such adsorbent is usefully employed for contacting with hydrocarbon mixtures to adsorb low-octane, linear and mono- or di-substituted alkanes therefrom, and thereby increase octane rating, e.g., of an isomerization naphtha raffinate. Adsorption processes and apparatus are also described, in which the carbon adsorbent can be utilized for production of higher octane rating hydrocarbon mixtures.