Abstract:
A catalyst element includes a porous housing; a filter core disposed within the housing; and a filler material comprising a catalyst particle, a redox particle, an oxidizing particle, or a combination comprising at least one of the foregoing particles, wherein the filler material is disposed within the housing; wherein the catalyst element comprises a plurality of tortuous flow paths, through which a reactive mixture may flow and contact at least a portion of each of the housing, filter core, and filler material. The catalyst element may be useful in a variety of chemical processes including hydrogenation, dehydrogenation, hydrogenolysis, oxidation, reduction, alkylation, dealkylation, carbonylation, decarbonylation, coupling, isomerization, amination, deamination, or hydrodehalogenation.
Abstract:
The present invention relates to an apparatus and method for mass production of carbon nanotubes. More specifically, it relates to an apparatus and method for mass production of carbon nanotubes, which are capable of achieving mass synthesis of carbon nanotubes and simultaneous production of various structures of carbon nanotubes, by a manner that a plurality of independent reaction chambers are configured, and a heater supplying temperatures necessary for reaction in the corresponding reaction chambers is configured to have a plurality of reaction temperature sections, such that the heater moves according to reaction steps in the respective reaction chambers under different reaction steps and matches reaction temperature sections to thereby continuously provide proper reaction temperatures to the respective reaction chambers and at the same time, to stably supply and discharge reaction gases and stabilizing gases necessary for the respective reaction steps to and from respective reaction chambers, in order to continuously produce carbon nanotubes.
Abstract:
The present invention relates to a catalytic device for the implementation of a reaction in a gaseous medium at high temperature, such as, for example, the synthesis of HCN or the oxidation of ammonia, comprising: at least one textured material (1) which is effective as catalyst for the said reaction, a support (2) comprising at least one ceramic part (3), the structure of which makes possible the passage of the gases, the said part (3) of the said support (2) having a corrugated face (6), so that the increase in surface area (β) produced by the corrugations with respect to a flat surface is at least equal to that (α) calculated for sawtooth corrugations and of between approximately 1.1 and approximately 3, the said textured material (1) being positioned so that it is held against the corrugated face (6) of the said part (3) of the said support (2) and follows the form thereof.
Abstract:
The invention relates to a fuel processor that produces hydrogen from a fuel. The fuel processor comprises a reformer and a heater. The reformer includes a catalyst that facilitates the production of hydrogen from the fuel; the heater provides heat to the reformer. Multipass reformer and heater chambers are described that reduce fuel processor size. Single layer fuel processors include reformer and heater chambers in a compact form factor that is well suited for portable applications. Some fuel processors described herein place an electrically resistive material in contact with a thermally conductive material to heat fuel entering the fuel processor. This is particularly useful during start-up of the fuel processor. Fuel processors described may also include features that facilitate assembly.
Abstract:
The invention provides a method and apparatus for integrating the heat transfer zones of plate fin and tube and finned tube exchangers and a catalytic mass transfer zone. The invention also provides a method for in situ regeneration of existing coated surface and augmentation of existing coated surface, or catalyst performance
Abstract:
A fuel gas-steam reformer assembly, preferably an autothermal reformer assembly, for use in a fuel cell power plant, includes a catalyst bed which is formed from a cylindrical monolithic open cell foam body. The foam body is preferably formed from a high temperature material such as stainless steel, nickel alloys and iron-aluminum alloys, or from a ceramic material. The foam body includes open cells or pores which are contained within the metal or ceramic lattice. The lattice is coated with a porous wash coat which serves as a high surface area substrate onto which catalysts used in the reformer are applied. The foam body has an inlet end into which a mixture of fuel, steam and air is fed to begin the reforming process. An inlet portion of the foam body may be provided with an iron oxide and/or noble metal catalyst and the remainder of the foam body may be provided with a nickel and/or noble metal catalyst. An advantage of including an autothermal reformer in a fuel processing system is the compactness of the autothermal reformer. The inclusion of the foam catalyst bed rather than the traditional catalyzed pellet bed allows the reformer to be made even more compact and light weight.
Abstract:
The reactor is comprised of a body, a tubular ceramic porous membrane element placed coaxially inside it to remove the hydrogen, and a catalyst for the thermal breakdown of the hydrogen sulfide into sulfur and hydrogen, wherein said catalyst has been deposited directly on the tubular ceramic porous membrane element in the form of a layer. The reactor is applicable for treating gases containing hydrogen sulfide.
Abstract:
To carry out a heterogeneously catalysed reaction, a reaction mixture comprising hydrocarbon and water is fed onto a catalyst that is produced by compressing at least one catalyst powder into a highly compressed layer which forms a shaped body. The reaction mixture is pressed through the catalyst layer with a pressure drop.
Abstract:
A reformer is disposed in the flow path of a reactant fluid. The reformer includes an electrically heatable heater unit of honeycomb structure, in the upstream of the flow path of a reactant fluid, and a catalyst unit of honeycomb structure capable of generating hydrogen from a reactant fluid containing an organic compound or carbon monoxide, by catalysis, in the downstream of the above heater unit. The heater unit and catalyst unit satisfy the following relationship: Cell density of the heater unit≦Cell density of the catalyst unit. The reformer improve efficiency for production of hydrogen and reduce CO as the by-product.
Abstract:
The system provides for the monitoring and elimination of hydrogen and combustible gases in the air, with the help of catalysers, being implemented in an apparatus consisting of a passive hydrogen recombiner and a monitoring detector, in which use is made of the free convective feed of a recorded and eliminated gaseous mixture of components, the components having a construction of the same type, it being possible to locate the detector both inside and outside the recombiner.