摘要:
The present invention is a multilayered catalyst structure coated onto the surface of a membrane which does not have physical micropores. The non-microporous membrane serves as a mechanical support for the thin multilayered catalyst structure and also can be used to control the rate at which some reactants arrive at (or some products leave from) the multilayered catalyst structure.A multilayered catalyst structure is coated on the non-microporous membrane which is composed of at least a catalyst layer and a separate transport layer.
摘要:
The present invention provides a novel, porous, composite membrane comprising a metallic support having large pores and a microporous ceramic membrane deposited on the support and integral therewith. Preferably, the support is steel having pores in the range of from about 0.25 .mu.m to about 50 .mu.m and the ceramic membrane is alumina having pores ranging from about 5 .ANG.to about 2500 .ANG..
摘要:
A method is described which details the preparation of large area close packed monolayers of colloidal particles from random distributions of colloidal particles by compressing the random network.
摘要:
Accordingly, there is provided a catalytic membrane comprising a porous substrate having a first surface and a second surface. The substrate has micropores, for example, pores ranging from about 10 .ANG. to about 2000 .ANG. in diameter, at least in a region extending from the first surface toward the second surface for a preselected distance. Preferably, the preselected distance will be sufficient to provide a measurable resistance to the flow of a fluid, such as a gas, through the micropores. A catalyst is deposited at least on the first surface of the substrate, although optionally, the catalyst is deposited on the substrate in the micorpore region. A transport layer is provided on the first surface of the substrate, including any catalyst on the first surface.
摘要:
Methods of determining a spatial distribution of an injected tracer material within a subterranean formation are disclosed, including flowing the tracer material, which includes a tracer electrical capacitance that differs from a formation electrical capacitance of a region of the subterranean formation, into the region of the subterranean formation via a wellbore. Subsequent to the flowing, the methods also include providing an input electromagnetic signal to the region of the subterranean formation. Responsive to the providing, the methods further include receiving an output electromagnetic signal from the subterranean formation. The methods further include determining the spatial distribution of the tracer material within the subterranean formation based, at least in part, on the output electromagnetic signal.
摘要:
Systems and methods for an oxy-fuel type combustion reaction are provided. In one or more embodiments, a combustion system can include at least two mixing zones, where a first mixing zone at least partially mixes oxygen and carbon dioxide to produce a first mixture and a second mixing zone at least partially mixes the first mixture with a fuel to produce a second mixture. The combustion system can also include a combustion zone configured to combust the second mixture to produce a combustion product. In one or more embodiments, the first mixture can have a spatially varied ratio of oxygen-to-carbon dioxide configured to generate a hot zone in the combustion zone to increase flame stability in the combustion zone.
摘要:
A gas separation process uses a structured particulate bed of adsorbent coated shapes/particles laid down in the bed in an ordered manner to simulate a monolith by providing longitudinally extensive gas passages by which the gas mixture to be separated can access the adsorbent material along the length of the particles. The particles can be laid down either directly in the bed or in locally structured packages/bundles which themselves are similarly oriented such that the bed particles behave similarly to a monolith but without at least some disadvantages. The adsorbent particles can be formed with a solid, non-porous core with the adsorbent formed as a thin, adherent coating on the exposed exterior surface. Particles may be formed as cylinders/hollow shapes to provide ready access to the adsorbent. The separation may be operated as a kinetic or equilibrium controlled process.
摘要:
A gas processing facility for the liquefaction of a natural gas feed stream is provided. The facility comprises a gas separation unit having at least one fractionation vessel. The gas separation unit employs adsorbent beds for adsorptive kinetic separation. The adsorbent beds release a methane-rich gas feed stream. The facility also includes a high-pressure expander cycle refrigeration system. The refrigeration system compresses the methane-rich gas feed stream to a pressure greater than about 1,000 psia. The refrigeration system also chills the methane-rich gas feed stream in one or more coolers, and then expands the chilled gas feed stream to form a liquefied product stream. Processes for liquefying a natural gas feed stream using AKS and a high-pressure expander cycle refrigeration system are also provided herein. Such processes allow for the formation of LNG using a facility having less weight than conventional facilities.
摘要:
A pressure-temperature swing adsorption process for the removal of a target species, such as an acid gas, from a gas mixture, such as a natural gas stream. Herein, a novel multi-step temperature swing/pressure swing adsorption is utilized to operate while maintaining very high purity levels of contaminant removal from a product stream. The present process is particularly effective and beneficial in removing contaminants such as CO2 and/or H2S from a natural gas at high adsorption pressures (e.g., at least 500 psig) to create product streams of very high purity (i.e., very low contaminant levels).
摘要:
A swing adsorption process for removing contaminants from a gaseous feed stream through a combination of a selective adsorbent material containing an effective amount of a non-adsorbent filler, adsorbent contactor design, and adsorption cycle design.