Provided is a supported catalyst for producing carbon nanotubes with a large specific surface area. The supported catalyst enables the production of carbon nanotubes with a large specific surface area in high yield. Therefore, the catalyst can be used in various fields. Also provided are carbon nanotubes produced using the supported catalyst.

Generally, the present invention relates to improvements in metal utilization in supported, metal-containing catalysts. For example, the present invention relates to methods for directing and/or controlling metal deposition onto surfaces of porous substrates. The present invention also relates to methods for preparing catalysts in which a first metal is deposited onto a support (e.g., a porous carbon support) to provide one or more regions of a first metal at the surface of the support, and a second metal is deposited at the surface of the one or more regions of the first metal. Generally, the electropositivity of the first metal (e.g., copper or iron) is greater than the electropositivity of the second metal (e.g., a noble metal such as platinum) and the second metal is deposited at the surface of the one or more regions of the first metal by displacement of the first metal. The present invention further relates to treated substrates, catalyst precursor structures and catalysts prepared by these methods. The invention further relates to use of catalysts prepared as detailed herein in catalytic oxidation reactions, such as oxidation of a substrate selected from the group consisting of N-(phosphonomethyl) iminodiacetic acid or a salt thereof, formaldehyde, and/or formic acid.

A process for vapor-phase carbonylation of methanol to methyl formate, whereby a feed gas containing methanol, carbon monoxide, hydrogen and oxygen is passed through a reactor loaded with a supported nano-scaled platinum group metal heterogeneous catalyst to produce methyl formate by a vapor-phase carbonylation reaction, under reaction conditions with a space velocity of 500-5000 h.sup.1, a temperature of 50-150 C. and a pressure of 0.01-2 MPa. Supported nano-scaled platinum group metal heterogeneous catalysts are prepared via ultrasonic dispersion and calcination. Methyl formate is produced and isolated under relatively mild conditions.

A catalyst carrier, an electrode catalyst, an electrode including the catalyst, a membrane electrode assembly including the electrode, and a fuel cell including the membrane electrode assembly. The catalyst carrier includes a carbon material having a chain structure including a chain of carbon particles and an alumina-carbon composite particle in which a carbon particle encloses an alumina particle, the alumina-carbon composite particle is contained in the carbon material, and the catalyst carrier has a BET specific surface area of 450 to 1100 m.sup.2/g.

The present invention refers to a process for converting a feed gas stream comprising carbon monoxide and hydrogen as major components (synthesis gas) into higher (C.sub.3+) alcohols making use of a catalyst combination of a Fischer-Tropsch catalyst and an olefin hydroformylation catalyst. In a second aspect, the invention relates to a Fischer-Tropsch catalyst suitable to be applied in said process.

Disclosed is a system for managing wireless transmitting devices in which a wireless transmission from a transmission device is detected within or about a set area and an allowability of the transmission device to continue transmitting is based on an identification information, of the device, a location of the device and a number being called by the device.

The present invention relates to a monolith catalyst for reforming reaction, and more particularly, to a thermally stable (i.e. thermal resistance-improved) monolith catalyst for reforming reaction having a novel construction such that any one of Group 1A to Group 5A metals are used as a barrier component in the existing catalyst particles to inhibit carbon deposition occurring during the reforming reaction in a process for formation of a reforming monolith catalyst while improving thermal durability as well as non-activation of the catalyst due to a degradation.

A method for promoting the supported catalysts using noble metal nanoparticles. Different noble metal precursors are preferentially deposited onto the supported metal catalysts through Chemical vapor deposition (CVD), and compositions so produced. Further, the promoted catalyst is used for CO and CO.sub.2 hydrogenation reactions, increasing the reaction conversion, C.sub.5+ compounds selectivity and chain growth probability. The active phase of catalyst can be either cobalt oxide, nickel oxide or their reduced format (Co.sup.0 or Ni.sup.0), and the noble metal is preferably Ruthenium.

A catalyst for hydrogen production that achieves both excellent catalytic activity and excellent durability, and a method of producing hydrogen using the catalyst, wherein the catalyst includes: a carbon carrier; and catalyst metal particles supported on the carbon carrier, wherein the catalyst metal particles each contain a noble metal, wherein the catalyst for hydrogen production has a ratio of a BJH mesopore volume to a BJH micropore volume of 0.30 or more and 7.80 or less obtained by a nitrogen adsorption method, and wherein the catalyst for hydrogen production has a ratio of a total of a BJH micropore area and a BJH mesopore area to a BJH macropore area of 30 or more and 3,500 or less obtained by the nitrogen adsorption method.

The present invention relates to an apparatus for reducing NOx in air, and a method of preparing a catalyst for reducing NOx in air, wherein the catalyst is for use in the apparatus. The apparatus comprises a catalyst, wherein the catalyst comprises Pt, PtCu, PtCo, PtNi, Pd, PtPd and/or PdCu. The apparatus further comprises a reaction chamber for receiving the catalyst, comprising an inlet for air and reductant, and an outlet. A heater is configured to heat the catalyst to temperatures of from 20 C. to 100 C. The apparatus also comprises a source of reductant, wherein the source of reductant is connected to the inlet. The method comprises step a) of combining a support material in water with a stabilising polymer to form an aqueous solution. Step b) includes adding a first metallic compound to the aqueous solution formed in step a), and stirring the solution. Step c) includes adding a reducing agent to the solution formed in step b), so as to form metallic nanoparticles. Step d) includes adding an acid to the solution formed in step c). Step e) includes stirring the solution formed in step d) and subsequently filtering and drying to form supported metallic nanoparticles.