Abstract:
A method of partially oxidizing a feed gas comprises providing a reactor containing a catalyst, providing a gas distributor comprising a body having a plurality of channels therethrough and a plurality of outlets from said channels for distributing gas across the catalyst, feeding the feed gas and the oxygen-containing gas into the gas distributor and allowing the feed gas and the oxygen-containing gas to flow through the gas distributor and out through the outlets into contact with the catalyst. The gas distributor preferably comprises a micro-channel gas distributor, which can be assembled by providing a plurality of etched plates defining flow channels, and stacking and fusing the plates. The reactant gases can be mixed within the gas distributor or maintained separately until they have exited the gas distributor.
Abstract:
A reactor comprising a packed bed of supported catalyst or supported catalyst precursor wherein the supported cata-lyst or the supported catalyst precursor comprise an external surface comprising a catalytically active metal or a precursor compound thereof, and the packed bed has a void content of more than 50% v and a specific surface area of more than 10 cm2/cm3, which is calculated as the total external surface area of the particles relative to the bed volume; the use of the said reactor in a chemical conversion process; a process for preparing hydrocarbons from syngas, which process comprises contacting a mixture of carbon monoxide and hydrogen in the said reactor, on the understanding that the catalytically active metal is a Group VIII metal which is at least in part present in metallic form; a packed bed of catalyst particles or catalyst precursor particles; and a catalyst particle or catalyst precursor particle.
Abstract:
The invention is a stacked catalytic reactor structure employing backside cooling of the catalyst deposited therein wherein the exits from the catalytic passages are interstrafied and proximate to the exits from the backside cooling passages. The structure is designed to oxidize a fluid in the presence of a catalyst and transfer some heat of reaction into a second fluid and isolate the fluid to be reacted from the backside cooling fluid and then combine both fluids.
Abstract:
The invention pertains to an improved apparatus comprised of a monolith catalytic reactor having an inlet and an outlet and a static mixer having an inlet and an outlet thereto with the outlet of said static mixer in communication with the inlet of said monolith catalytic reactor. The invention also pertains to an improvement in a process for effecting a reaction in the monolith catalytic reactor wherein a reactant gas and reactant liquid are introduced to the inlet to the monolith catalytic reactor, reacted and, then, the reaction product passed through the outlet of the monolith catalytic reactor.
Abstract:
A catalytic converter configuration for exhaust gas systems of motor vehicles includes a housing surrounding at least two substantially successively disposed catalyst carrier bodies each having axial channels with normal cross-sectional areas. The first catalyst carrier body has at least two or more through-flow apertures running parallel to the axial channels and having second cross-sectional areas substantially larger than the first cross-sectional areas. A device and a method are provided for manufacturing a catalyst carrier body, in particular the first catalyst carrier body, from at least one stack of a multiplicity of at least partly structured sheet metal layers forming a multiplicity of channels through which a fluid can flow. A fork-like twisting device is rotatable about a central axis, engages each stack and is substantially surrounded by a mold. Active winding spindles are disposed on a carrier of the twisting device. The spindles can be brought into engagement with the at least one stack and are movable for expanding the twisted stack, in particular for forming through-flow apertures within the catalyst carrier body.
Abstract:
A catalyst for the purification, e.g., disinfection, of water is disclosed. The catalyst of the invention comprises a substrate, a first metal, and at least one additional metal. The metals are codeposited on the substrate to form a unified structure. Methods of using the catalyst to disinfect water and devices for the purification of water are also disclosed.
Abstract:
Methanol steam reforming catalysts, and steam reformers and fuel cell systems incorporating the same. In some embodiments, the methanol steam reforming catalyst includes zinc oxide as an active component. In some embodiments, the methanol steam reforming catalyst further includes at least one of chromium oxide and calcium aluminate. In some embodiments, the methanol steam reforming catalyst is not pyrophoric. Similarly, in some embodiments, steam reformers including a reforming catalyst according to the present disclosure may include an air-permeable or air-accessible reforming catalyst bed. In some embodiments, the methanol steam reforming catalyst is not reduced during use. In some embodiments, the methanol reforming catalysts are not active at temperatures below 275null C. In some embodiments, the methanol steam reforming catalyst includes a sulfur-absorbent material. Steam reformers, reforming systems, fuel cell systems and methods of using the reforming catalysts are also disclosed.
Abstract:
A catalytic reactor (10) comprises a plurality of fluid-impermeable elements (tubes or plates) (12) defining flow channels (15) between them. Tight fitting within each flow channel (15) is a sheet (16) of corrugated material whose surfaces are coated with catalytic material. At each end of the reactor (10) are headers (18) to supply gas mixtures to the flow channels (15), the headers communicating with adjacent channels being separate. The reactor (10) enables different gas mixtures to be supplied to adjacent channels (15), which may be at different pressures, and the corresponding chemical reactions are also different. Where one of the reactions is endothermic while the other reaction is exothermic, heat is transferred through the wall of the tube (12) separating the adjacent channels (15), from the exothermic reaction to the endothermic reaction. The reactor (10) may be used in a compact plant to perform steam/methane reforming, obtaining the necessary heat by catalytic methane combustion and also for Fisher-Tropsh synthesis.
Abstract:
In a process for preparing formaldehyde from methanol by dehydrogenation in a reactor in the presence of a catalyst at a temperature in the range from 300 to 1000null C., a carrier gas stream which has a temperature above the dehydrogenation temperature is fed to the reactor.
Abstract:
One aspect of the present invention is a furnace component comprising an inorganic material that is exposed to a gas stream comprising hydrocarbon compounds, wherein at least a portion of the exposed inorganic material comprises a catalyst that promotes a hydrocarbon reaction to produce an olefin. The inorganic material may be a glass, a glass-ceramic, or a ceramic and may be coated onto the inside wall of a hydrocarbon cracking reactor or may be used as particles, powder, beads, monoliths, or other structured forms. The glass-ceramic material may further comprise a catalyst that facilitates carbon gasification. Another aspect of the present invention provides a method of making a furnace component, the method comprising the steps of a) melting together the components of a base inorganic material and a catalyst that promotes a carbon reaction to produce an olefin and, b) cooling the melt to provide a solid composition.