Reactor for catalytic production of hydrogen and carbon oxide

FIELD: production of non-metallic elements.

SUBSTANCE: reactor comprises means for supplying hydrocarbon raw material and water vapor, means for discharging the product, and porous metallic load-bearing structure that receives catalyzer of reforming with water vapor. The porous load-bearing metallic structure is secured to the inner wall of the reactor by means of gluing or diffusion bounding.

EFFECT: improved functional capabilities.

5 cl, 2 dwg

 

The present invention relates to a process of reforming with water vapor, and more particularly to a reactor for catalytic production of hydrogen and carbon monoxide.

Known reactor for the catalytic production of hydrogen and carbon monoxide, which represents a device equipped with means for feeding hydrocarbons and water vapor, and means for removing reaction product, and the inner wall of the reactor is equipped with a thin film of catalyst reforming with water vapor (EP 0855366 A1, M CL 01 In 3/38, 29.07.1998).

The main problem with the known reactor is to create a sufficient strength of adhesion of the catalyst to the inner wall of the reactor and at the same time maintain the required properties of the catalyst with respect to its catalytic activity, porous structure, resistance to agglomeration and so on.

The technical result of the invention is to provide a reactor for the catalytic production of hydrogen and carbon monoxide with improved performance due to the increased stability of the adhesion of the catalyst layer to the inner wall of the reactor.

It is achieved by a reactor for the catalytic production of hydrogen and carbon monoxide, which represents a device equipped with means for feeding hydrocarbons and water vapor and is Redstone removal of the reaction product, moreover, the inner wall of a reactor provided with a catalyst bed of reforming with water vapor, which comprises a porous metallic carrier structure within which precipitated catalyst reforming with water vapor, and porous metal support structure attached to the inner wall of the reactor through prepaymania or diffusion bonding.

The catalyst deposited inside the porous carrier structure and is held in this structure, which reduces or even eliminates the requirement of adhesion of the catalyst to the reactor wall.

Porous metal structures have superior adhesion to the metal wall of the reactor. When implementing the present invention can be used with any type of metal porous structure, which is capable of withstanding the conditions of the actual process, used in the process of reforming with water vapor, including a metal foam, a metal mesh, expanded metal, sintered metal and metal gauze. Requirements for adhesion of the catalyst depend on the selected type of porous metal.

Foamed metal has a structure where the cavity of the pores are predominantly spherical, and the openings of the cavities have a radius less than the radius of the spherical cavities. The catalytic material is deposited in the cavities, is not excluded from cavities Therefore, the adhesion of the catalyst to the metal is not required.

The catalyst may be deposited in the cavities, for example, by the intrusion of a suspension containing a ceramic precursor, a metal foam with subsequent drying, calcination and application of catalytically active material.

If you choose porous metal structure in which the catalyst is not charged physical surface structure, the required strength of adhesion of the catalyst to the metal is still declining. Owing to the increased area of the interfacial surface between the catalyst and the metal adhesion strength per unit area becomes lower to provide the same overall strength of adhesion.

The loss of the catalyst due to attrition successfully reduced, since the catalyst is protected by a metal structure in contact with the gas, inevitably containing particles flying along the inner surface of the reactor.

The risk of exfoliation of the catalyst from the wall of the reactor by, for example, thermal stress significantly reduced.

The porous structure for use in the reactor according to the present invention represents the first stage attached to the wall of the reaction vessel. Then the catalyst is dispersed in this porous structure.

The porous metal can be attached to the wall of the reactor, for example, the solder or diffusion bonding.

Stage of production, in which the porous metal attached to the wall of the reactor, require heating of the reactor and the porous metal to a temperature above the maximum operating temperature of the reactor. This is necessary to ensure sufficient adhesion strength at the maximum operating temperature of the reactor.

When using the solder, the temperature of prepaymania must be at least 100-150°higher than the maximum operating temperature.

The catalyst may be placed in a porous structure through, for example, spraying, painting or dipping into a slurry containing a ceramic precursor. After that, the suspension is dried and calcined. Finally, the thus obtained ceramic layer impregnorium catalytically active material. Different catalytically active material can be used simultaneously with the ceramic precursor.

In a particular embodiment of the invention the porous structure attached to the wall of the reactor reformer according to the following procedure:

Porous metal structure after a suitable preprocessing of the carrier material and the tube is placed in a tube reactor with pripiasm material. The tube is installed in the induction furnace so that the part of the tube is heated is use temperature prepaymania. Use a mandrel or sphere, to press the porous metal to the tube wall in the area of prepaymania in order to ensure contact with the wall of the tube, as shown schematically in figure 1 in the attached drawings. Zone heating and the mandrel move along the tube length to get the solder carrier material along the entire length of the tube.

This invention can also be used for other shapes other than round tubes using mandrels suitable form.

Installation for the next method of attaching a porous metal to the wall of the reactor of the reforming process is shown schematically in Figa and Figb. Figa shows the installation visible from the end; Figb shows a view in parts. Porous metal structure 1 after a suitable preprocessing of the carrier material and the tube is placed in the tube 2 together with pripiasm material 3. Inside the tube are installing a second smaller tube or rod 4. In the annular space between the inner and outer tubes placed material 5, which expands at high temperature. The spacer 6 is placed to avoid contact between 5 and 1. The tube is placed in an oven and heated to a temperature of prepaymania. Expandable material presses the porous metal structure to the wall of the tube to provide contact with the wall of the tube. Used EXT the decomposing material 5 is a Interam® the product, which can be obtained from 3M Inc. In both methods, the catalyst is completely dispersed in the porous structure.

1. Reactor for the catalytic production of hydrogen and carbon monoxide, which represents a device equipped with means for feeding hydrocarbons and water vapor, and means for removing reaction product, and the inner wall of a reactor provided with a catalyst bed of reforming with water vapor, characterized in that the reactor includes a porous metal bearing structure within which precipitated catalyst reforming with water vapor, and porous metal support structure attached to the inner wall of the reactor through prepaymania or diffusion bonding.

2. The reactor according to claim 1, characterized in that the metal structure is a foamed metal, a metal mesh, expanded metal, sintered metal or metal gauze.

3. The reactor according to claim 1, characterized in that the solder is carried out using an induction furnace.

4. The reactor according to claim 3, characterized in that the porous carrier material is a foamed metal.

5. The reactor according to claim 1, characterized in that the porous carrier material is fixed during the process of prepaymania by the expanding material.

6. The reactor according to any one of the previous is unstow, characterized in that the device is a tube.



 

Same patents:

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SUBSTANCE: hydrocarbon/steam mixture is subjected to preliminary reforming stage in contact with first steam reforming catalyst enclosed within externally heated preliminary reforming reactor in passage for furnace gas escaping from steam reforming reactor with flame heating. Stream subjected to preliminary reforming and escaping from preliminary reforming reactor comes into contact with second steam reforming catalyst enclosed within steam reforming reactor with flame heating. Process may further comprise stage wherein stream subjected to preliminary reforming interacts with third reforming catalyst disposed outside of furnace gas passage between preliminary reforming reactor outlet (in furnace gas passage) and inlet of steam reforming reactor with flame heating.

EFFECT: prolonged undisturbed process period.

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SUBSTANCE: invention relates to methods for decomposing and utilizing hydrogen sulfide and/or mercaptans, which methods can be used for production of hydrogen and sulfur from hydrogen sulfide as well as for purification of gas mixtures polluted by hydrogen sulfide and/or mercaptans. Method comprises passing hydrogen sulfide and/or mercaptan-containing gas at temperature below 200°C through solid catalyst bed placed in liquid capable of dissolving reaction intermediates and/or sulfur arising on catalyst surface to release hydrogen and/or hydrocarbons.

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EFFECT: enhanced compactness of reactors; reduced usage of expensive materials.

6 cl, 2 dwg

FIELD: chemical industry; conducting non-adiabatic reactions.

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FIELD: power industry, mechanical engineering and environmental control.

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1 cl, 87 ex

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3 cl, 1 dwg

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3 cl, 1 dwg

FIELD: methods of production of hydrogen, electrical power and the hydraulically purified products out of hydrocarbon raw materials.

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18 cl, 1 dwg, 9 ex

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15 cl, 4 dwg

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The invention relates to a device for producing oxygen-containing additive to motor gasoline, namely methyl tert-butyl ether (MTBE), ethyl tert-butyl ether (ETBE), and tert-amyl methyl ether (tame) and other additives, the production of which uses a fine ball catalyst

Tubular reactor // 2201799
The invention relates to the field of chemical engineering

The invention relates to a device for producing oxygen-containing additive to motor gasoline and other additives, which are used fine ball catalysts

The invention relates to a device for producing oxygen-containing additive to motor gasoline, the production of which used fine ball catalysts

The invention relates to non-isothermal chemical reactors with a bulk layer of the catalyst and may find application in the chemical and petrochemical industry

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FIELD: heterogeneous catalysts.

SUBSTANCE: catalyst contains porous carrier, buffer layer, interphase layer, and catalytically active layer on the surface wherein carrier has average pore size from 1 to 1000 μm and is selected from foam, felt, and combination thereof. Buffer layer is located between carrier and interphase layer and the latter between catalytically active layer and buffer layer. Catalyst preparation process comprises precipitation of buffer layer from vapor phase onto porous carrier and precipitation of interphase layer onto buffer layer. Catalytic processes involving the catalyst and relevant apparatus are also described.

EFFECT: improved heat expansion coefficients, resistance to temperature variation, and reduced side reactions such as coking.

55 cl, 4 dwg

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