摘要:
The invention relates to a catalyst filling, comprising a first layer of a planar catalyst material and a second layer of a planar catalyst material lying over said first layer, wherein the catalyst material of the first layer comprises at least two plates, which butt against each other to form an abutment edge in each case, wherein the catalyst material of the second layer comprises at least two plates, which butt against each other to form an abutment edge in each case, and wherein the plates of the second layer are designed and/or arranged relative to the plates of the first layer in such a way that the abutment edge or abutment edges of the second layer are not aligned with the abutment edge or abutment edges of the first layer.
摘要:
Disclosed are a radiating wall catalytic reactor for providing heat from the inside wall surface 8 of a reaction chamber 1 by radiation 16 to support an overall endothermic gas phase chemical reaction taking place in the reaction chamber 1, and a process for carrying out a chemical reaction in the reactor. The reaction chamber 1 is provided with an entrance port 2 for introducing a gaseous reactant(s) in a continuous manner into the chamber 1 and an exit port 3 to enable the gaseous product(s) to leave the chamber 1 in a continuous manner. The reaction chamber 1 includes a plurality of catalyst segments (A)5, which has one void segment (B)6 on either side of it; and the reaction chamber 1 is made of a material(s) that is (are) suitable to resist a temperature of 700° C. or more.
摘要:
A process for producing a metallic foam body, having a substrate made of at least one metal or metal alloy A and a layer of a metal or metal alloy B. The metal or metal alloy A and the metal or metal alloy B are selected from a group consisting of Ni, Cr, Co, Cu, Ag, and any alloy thereof and are different. The process includes providing a porous organic polymer foam. The process also includes depositing at least one first metal or metal alloy A on the porous organic polymer foam. The process further includes burning off the porous organic polymer foam to obtain a metallic foam body substrate. The process yet further includes depositing by electroplating a metallic layer of a metal or metal alloy B at least on a part of the surface of the metallic foam body substrate.
摘要:
An open-pored metal body, which is formed having a core layer (A) consisting of Ni, Co, Fe, Cu, Ag or an alloy formed having one of said chemical elements, wherein one of said chemical elements is present in the alloy at more than 25 at %, and a gradated layer (B) is formed on surfaces of the core layer (A), said gradated layer being formed by intermetallic phase or mixed crystals of Al, and a layer (C), which is formed having aluminum oxide, is formed on the gradated layer (B).
摘要:
A metallic foam body containing an alloy skin which is up to 50 μm thick can be obtained by a process including (a) providing a metallic foam body comprising a first metallic material; (b) applying a second metallic material which contains a first metallic compound that is leachable as such and/or that can be transformed by alloying into a second metallic compound that is leachable and different from the first metallic compound on a surface of the foam body (a), by coating the metallic foam body with an organic binder and a powder of the second metallic material; (c) forming a skin on foam body (b) by alloying the first and the second metallic material; and (d) leaching out with a leaching agent at least a part of the first and/or the second metallic compound.
摘要:
An open-pored metal body, which is formed having a core layer (A) consisting of Ni, Co, Fe, Cu, Ag or an alloy formed having one of said chemical elements, wherein one of said chemical elements is present in the alloy at more than 25 at %, and a gradated layer (B) is formed on surfaces of the core layer (A), said gradated layer being formed by intermetallic phase or mixed crystals of Al, and a layer (C), which is formed having aluminum oxide, is formed on the gradated layer (B).
摘要:
The invention relates to a metallic foam body, comprising (a) a metallic foam body substrate made of at least one metal or metal alloy A; and (b) a layer of a metal or metal alloy B present on at least a part of the surface of the metallic foam body substrate (a), wherein A and B differ in their chemical composition and/or in the grain size of the metal or metal alloy, and wherein the metal or metal alloy A and B is selected from a group consisting of Ni, Cr, Co, Cu, Ag, and any alloy thereof; obtainable by a process comprising the steps (i) provision of a porous organic polymer foam; (ii) deposition of at least one metal or metal alloy A on the porous organic polymer foam; (iii) burning off of the porous organic polymer foam to obtain the metallic foam body substrate (a); and (iv) deposition by electroplating of the metallic layer (b) of a metal or metal alloy B at least on a part of the surface of the metallic foam body (a). The invention moreover relates to a process for the production of the metallic foam body and a use of the metallic foam body.
摘要:
A method for producing open-pored molded bodies made of a metal. The surface of the metal open-pored molded body being used as a semi-finished product, is coated with particles of the same metal with which the semi-finished product is made or with particles of a chemical compound of the metal the semi-finished product is made, wherein the compound or particles can be reduced or thermally or chemically decomposed in a thermal treatment. After the coating process, a thermal treatment in a suitable atmosphere is carried out, in which the particles are connected to the surface of the semi-finished product and/or adjacent particles such that the specific surface area of the obtained open-pore molded body is increased to at least 30 m2/l and/or at least by a factor of 5 in comparison to the starting material.
摘要:
Disclosed are a radiating wall catalytic reactor for providing heat from the inside wall surface 8 of a reaction chamber 1 by radiation 16 to support an overall endothermic gas phase chemical reaction taking place in the reaction chamber 1, and a process for carrying out a chemical reaction in the reactor. The reaction chamber 1 is provided with an entrance port 2 for introducing a gaseous reactant(s) in a continuous manner into the chamber 1 and an exit port 3 to enable the gaseous product(s) to leave the chamber 1 in a continuous manner. The reaction chamber 1 includes a plurality of catalyst segments (A)5, which has one void segment (B)6 on either side of it; and the reaction chamber 1 is made of a material(s) that is (are) suitable to resist a temperature of 700° C. or more.
摘要:
A method of manufacturing a catalyst material includes the steps of: providing a body having an open-porous foam structure and comprising at least a first metal or alloy; providing particles, each of which particles comprising at least a second metal or alloy; distributing the particles on the body; forming a structural connection between each of at least a subset of the particles and the body; and forming an oxide film on at least the subset of the particles and the body, wherein the oxide film has a catalytically active surface.