Abstract:
Carbonaceous materials are described, having utility for fluid storage/dispensing and desulfurization applications. The carbonaceous material in one implementation is a nanoporous carbon composite having porosity that is at least partially filled with material imparting to the composite an enhanced character with respect to characteristics selected from the group consisting of hardness, wear-resistance and toughness, as compared with the nanoporous carbon alone. Another implementation utilizes porous carbon material as a storage medium for chlorine gas. A further implementation utilizes porous carbon material as a hydrogen storage medium, e.g., for hydrogen fuel cells. In another implementation, porous carbon material is employed as a sorbent medium in a fluid storage and dispensing system, in an arrangement of multiple porous carbon articles, and positional stabilization structure is employed to restrain the arrangement against movement. Infrared emitter devices are described, which utilize carbon adsorbent to store silane for reaction with oxygen in a controlled manner. An arrangement in which carbon adsorbent is desorbed of residual fluid by resistive and/or inductive heating of the adsorbent is described. Also described is a method of increasing the loading capacity of a porous carbon adsorbent, by contacting of the carbon adsorbent with a swelling agent, followed by contacting of the carbon adsorbent with a pressurized gaseous penetration agent, and by removal of the swelling agent and penetration agent.
Abstract:
The disclosed invention relates to a process for separating methane or nitrogen from a fluid mixture comprising methane and nitrogen, the process comprising: (A) flowing the fluid mixture into a microchannel separator, the microchannel separator comprising a plurality of process microchannels containing a sorption medium, the fluid mixture being maintained in the microchannel separator until at least part of the methane or nitrogen is sorbed by the sorption medium, and removing non-sorbed parts of the fluid mixture from the microchannel separator; and (B) desorbing the methane or nitrogen from the sorption medium and removing the desorbed methane or nitrogen from the microchannel separator. The process is suitable for upgrading methane from coal mines, landfills, and other sub-quality sources.
Abstract:
A gas diffusion barrier contains a polymer matrix and a functional graphene which displays no signature of graphite and/or graphite oxide, as determined by X-ray diffraction.
Abstract:
Use of molecular sieves to reduce the amount of trifluoromethane (HFC-23) present in a mixture of HFC-23 with other materials, particularly from mixtures containing HFC-23 and trifluoroiodomethane (CF 3 l).
Abstract translation:使用分子筛减少HFC-23与其他材料,特别是含有HFC-23和三氟碘甲烷(CF 3 N 3)的混合物的混合物中存在的三氟甲烷(HFC-23)的量。
Abstract:
A carbon dioxide storage system includes a container and a conduit attached to the container for introducing or removing a carbon dioxide-containing composition from the container. A carbon dioxide storage material is positioned within the container. The carbon dioxide-storage material includes a metal-organic framework, which has a sufficient surface area to store at least (10) carbon dioxide molecules per formula unit of the metal-organic framework at a temperature of about 25° C.
Abstract:
An electrically regenerable gas filter system includes a carbon fiber composite molecular sieve (CFCMS) filter medium (7) for separation and purification, or catalytic processing of fluids. Filter medium (7) is made of carbon fibers rigidly bonded to form an open, permeable, rigid monolith capable of being formed to near-net-shape. A separate medium-efficiency pre-filter (5) removes particulate from a supply airstream before the airstream passes through the CFCMS filter (7) to sorb gaseous air polutants. The airstream is then recirculated to a space. When saturated, CFCMS media (7) is regenerated utilizing a low-voltage current from power supply (22) that is caused to pass through filter media (7).
Abstract:
A gas diffusion barrier contains a polymer matrix and a functional graphene which displays no signature of graphite and/or graphite oxide, as determined by X-ray diffraction.
Abstract:
A gas permeable, carbon based, nanocomposite membrane comprises a nanoporous carbon matrix comprising a pyrolyzed polymer, and a plurality of nanoparticles of carbon or an inorganic compound disposed in the matrix. The matrix is prepared by pyrolyzing a polymer, and nanoparticles of the particulate material are disposed in the polymer prior to pyrolysis. The particles may be disposed in a precursor of the polymer, which precursor is subsequently polymerized, or in the polymer itself.
Abstract:
A mixed matrix membrane for separating gas components from a mixture of gas components is disclosed. The membrane comprises a continuous phase polymer with inorganic porous particles, preferably molecular sieves, interspersed in the polymer. The polymer has a C0 2 /CH 4 selectivity of at least (20) and the porous particles have a mesoporosity of at least 0.1 cc STP/g. The mixed matrix membrane exhibits an increase in permeability of least 30% with any decrease in selectivity being no more than 10% relative to a membrane 10 made of the neat polymer. The porous particles may include, but are not limited to, molecular sieves such as CVX-7 and SSZ-13, and/or other molecular sieves having the required mesoporosity. A method for making the mixed matrix membrane is also described. Further, a method is disclosed for separating gas components from a mixture of gas components using the mixed matrix membrane with mesoporous particles.
Abstract:
An adsorbent for separating nitrogen from a mixed gas of oxygen and nitrogen, characterized in that it is a MSC (molecular sieving carbon) satisfying the following formula: (t 95 /t 50 ) 35 wherein &agr; represents a separation ratio of oxygen and nitrogen, t 50 represents the time required for adsorbing 50 % of an equilibrium adsorption amount of oxygen, and t 95 represents the time required for adsorbing 95 % of an equilibrium adsorption amount of oxygen; and a method for separating nitrogen from a mixed gas of oxygen and nitrogen which employs the PSA (pressure swing adsorption) method and uses the absorbent. The method allows the reduction of the amount of an adsorbent used for a given amount of nitrogen generated, which leads to the saving of an equipment cost, the miniaturization of an apparatus and the reduction of a power consumption.