IE44836B1 - Ceramic structure for catalyst support - Google Patents
Ceramic structure for catalyst supportInfo
- Publication number
- IE44836B1 IE44836B1 IE923/77A IE92377A IE44836B1 IE 44836 B1 IE44836 B1 IE 44836B1 IE 923/77 A IE923/77 A IE 923/77A IE 92377 A IE92377 A IE 92377A IE 44836 B1 IE44836 B1 IE 44836B1
- Authority
- IE
- Ireland
- Prior art keywords
- partitions
- ceramic
- lies
- outside diameter
- internal
- Prior art date
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 13
- 239000003054 catalyst Substances 0.000 title claims abstract description 5
- 238000005192 partition Methods 0.000 claims abstract description 37
- 229930195733 hydrocarbon Natural products 0.000 claims abstract description 4
- 150000002430 hydrocarbons Chemical class 0.000 claims abstract description 4
- 238000002407 reforming Methods 0.000 claims abstract description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 abstract description 12
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 7
- 239000000395 magnesium oxide Substances 0.000 abstract description 6
- 239000007787 solid Substances 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 3
- 239000008188 pellet Substances 0.000 description 2
- 239000005995 Aluminium silicate Substances 0.000 description 1
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 description 1
- 229910000323 aluminium silicate Inorganic materials 0.000 description 1
- 235000012211 aluminium silicate Nutrition 0.000 description 1
- 238000006555 catalytic reaction Methods 0.000 description 1
- -1 clay Chemical compound 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000000629 steam reforming Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/30—Loose or shaped packing elements, e.g. Raschig rings or Berl saddles, for pouring into the apparatus for mass or heat transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/30—Details relating to random packing elements
- B01J2219/302—Basic shape of the elements
- B01J2219/30223—Cylinder
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/30—Details relating to random packing elements
- B01J2219/304—Composition or microstructure of the elements
- B01J2219/30416—Ceramic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/30—Details relating to random packing elements
- B01J2219/304—Composition or microstructure of the elements
- B01J2219/30475—Composition or microstructure of the elements comprising catalytically active material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Catalysts (AREA)
- Hydrogen, Water And Hydrids (AREA)
Abstract
1513544 Ceramic catalyst support CERAVER 2 May 1977 [7 May 1976] 18315/77 Heading C1J A ceramic support structure for a catalyst (in particular for reforming hydrocarbons) has a tubular shape with radical internal partitions whose angular spacing is regular, wherein the number of internal radial partitions is five (see Fig. 2) or seven. The ceramic may be alumina or magnesia and typically its outside diameter lies between 12 and 26 mm, its inside diameter lies between 8 and 24 mm, the thickness of its external partitions lies between 1 and 2 mm and its length is substantially equal to its outside diameter.
Description
The .present invention relates to a ceramic support structure for a catalyser.^ in particular for reforming hydrocarbons.
Catalysers are known for steam reforming which are disposed -,1 on a refractory support formed by a ceramic paste which is shaped and baked. The refractory support is made for example of alumina or of an aluminium silicate such as clay, china or mullite. These supports are then poured in i?ulk into a catalysis receptacle.
The supports of these catalysers are in the form either of solid pellets or of cylinders with longitudinal channels which can be divided by radial partitions whose angular spacing is regular, Solid pellets have insufficient heat exchange surface which reduces the efficiency of the catalyser and cause large head losses. Cylinders having longitudinal channels have a larger heat exchange surface cause smaller head losses; but their crushing strength is sometimes insufficient.
Preferred, embodiments of the present invention overcome the above disadvantages and provide a ceramic support structure for a catalyser which has Sufficient crushing strength which is substantially homogeneous V all round its periphery, while only causing low head loss and providing a large heat exchange surface.
The present invention provides a ceramic support structure for a catalyst, in particular for reforming hydrocarbons, the support structure having a tubular shape with radial internal partitions whose angular spacing is regular, wherein the number of internal radial partitions is five or seven.
Preferably, the outside diameter of the structure lies between and 26 mm and its inside diameter lies between 8 and 23 mm, the thickness of its internal partitions lies between 1 and 2 mm and its length is about the same as its outside diameter. 2· Advantageously, the number of internal partitions is five, the outside diameter then lying between 14 and 18 mm and the inside diameter lying between 12 and 17 mm.
It is also preferable for the thickness of the internal partitions to be substantially equal to that of the periphery.
Embodiments of the invention are described by way of example with reference to the accompanying drawings in which:Figure 1 shows a cross-section of a cylinder which does not embody the invention and which has 4 radial partitions at an angle of 90° from one another. It is subjected to a radial crushing force at 45° to the partitions (solid arrow) or in the direction of a partition (arrow formed by an interrupted line).
Figure 2 shows a first cross-section of a first cylinder which embodies the invention and which has 5 radial partitions at 72° from one another. It is subjected to a crushing force in the direction of one of the partitions (solid arrow) or at 90° to one of the partitions (arrow formed by an interrupted line).
Figure 3 shews a cross-section of a second cylinder which entodies the invention and which has 7 radial partitions at about 51° 25' from one another.
Dud to work by the Applicant, it has been possible to compare the crushing strength of supports for catalysers constituted by cylinders having an outside diameter of 16 mm, an inside diameter of 13 mm and a length equal to their outside diameter and fitted respectively with 4 to 5 radial partitions having a thickness of 1.5 mm. with a regular angular spacing, made of sintered alumina with a porosity of 40-42% or sintered magnesia with a pprosity of 35-38%.
In figure 1, the cylinder shown in cross-section comprises a peripheral part 1 and four partitions 2, 3, 4 and 5 at 90° to one another. -344836 This cylinder is subject to a crushing force at 45° to the partitions, in the direction of the arrow 6, or to a force in the direction of a \ l V portion along an arrow 7.
In figure 2, the cylinder shown also in cross-section comprises 5 a peripheral part 11 and five partitions 12, 13, 14, 15 and 16, at equal angles of 72° to one another. The crushing force is applied either in the direction of a partition, as shown by the arrow 17, or perpendicularly to this partition, as shown by the arrow 18.
The following table summarizes'the breaking strength of the 10 cylinder^ defined hereinabove, made of sintered alumina haying a porosity of 40 to 42° and of sintered magnesia having a porosity of 38% or 35 to 37%.
Cylinder with 4 partitions Cylinder with 5 partitions Force in the - Force at 45° to Force in the Force at 90° to direction of two radial direction of a radial partition two radial partitions two radial partitions T partitions Alumina with a pprosity of 40-42% Alumina with a porosity of 42% 120-140 daNx12-18 daN 22-26 daN 28-34 daN Magnesia with a porosity of 38% 1 .· Magnesia with a porosity of 35-37% 120-150 daN 15-17 daN. 25-30 daN 28-34 daN It will be observed that the porosity of the alumina samples on the one hand and of magnesia on the other,.although not strictly equal, are sufficiently close for the results to .be practically comparable.
A cylinder with only 3 partitions offers a lower average crushing strength, but a cylinder having 7 partitions causes a higher loss of head of the gas which passes through it, but opposes a higher mechanical strength to crushing. λ .
Figure 3 shows a oylinder with 7 radial partitions 22, 23, 24, 25,26, 27-and 28, with a peripheral part 21 sorrouriding the internal partitions. - 4 - · ·
Claims (5)
1. CLAIMS:1, A ceramic support structure for a catalyst, in particular for reforming hydrocarbons, the support structure having a tubular shape with radial internal partitions whose angular spacing is regular, wherein the number 5 of internal radial partitions is five or seven.
2. * A ceramic structure according to claim 1, wherein its outside diameter lies between 12 and 26 mm, its inside diameter lies between 8 and 24 mm, the thickness of its external partitions lies between 1 and 2 mm and its length is substantially equal to its outside diameter. 10 A ceramic structure according to claim 2, wherein the number of its internal partitions is five, its outside diameter lying between 14 and 18 mm and its inside diameter lying between 12 and 17 mm.
3.
4., A ceramic structure according to any one of claims 1 to 3, wherein the thickness of its internal partitions is substantially equal to that of IS its periphery.· !
5. A ceramic support structure substantially as herein described with reference to figdres 2 or 3 of the accompanying drawings. Dated this the 6th day of May, 1977· F. R. KELLY & CO. η
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7613747A FR2350141A1 (en) | 1976-05-07 | 1976-05-07 | CERAMIC CATALYST SUPPORT STRUCTURE |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE44836L IE44836L (en) | 1978-11-07 |
| IE44836B1 true IE44836B1 (en) | 1982-04-07 |
Family
ID=9172833
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE923/77A IE44836B1 (en) | 1976-05-07 | 1977-05-06 | Ceramic structure for catalyst support |
Country Status (9)
| Country | Link |
|---|---|
| BE (1) | BE854092A (en) |
| DE (1) | DE2719543A1 (en) |
| DK (1) | DK199377A (en) |
| FR (1) | FR2350141A1 (en) |
| GB (1) | GB1513544A (en) |
| IE (1) | IE44836B1 (en) |
| IT (1) | IT1085539B (en) |
| LU (1) | LU77250A1 (en) |
| NL (1) | NL180179C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4460704A (en) * | 1980-06-15 | 1984-07-17 | Imperial Chemical Industries Plc | Catalyst for the production of hydrogen |
| EP0045126B1 (en) * | 1980-06-25 | 1984-12-05 | Imperial Chemical Industries Plc | Catalytic process for producing hydrogen |
| US4510263A (en) * | 1983-10-17 | 1985-04-09 | W. R. Grace & Co. | Catalyst with high geometric surface area alumina extrudate and catalyst with high geometric surface area |
| CA1218349A (en) * | 1983-10-17 | 1987-02-24 | Gwan Kim | Catalyst with high geometric surface area |
| DE3501941A1 (en) * | 1985-01-22 | 1986-07-24 | Ekkehard Prof. Dr.-Ing. 4300 Essen Weber | Web catalyst apparatus for removing nitrogen oxides |
| DE19828491A1 (en) | 1998-06-26 | 1999-12-30 | Degussa | Silicon dioxide molded article, useful as a catalyst support for the production of vinyl acetate monomer |
| DE102005019596A1 (en) * | 2005-04-27 | 2006-11-02 | Süd-Chemie AG | Cylindrical catalyst body, used for steam reforming hydrocarbons, comprises extent surface, which is parallel to longitudinal axis of catalyst body running grooves and between grooves exhibiting running webs |
| DE102007046297B4 (en) | 2007-09-27 | 2016-12-22 | Süd-Chemie Ip Gmbh & Co. Kg | New catalyst design and manufacturing method for steam reforming catalysts |
| US7775507B2 (en) * | 2007-11-05 | 2010-08-17 | Saint-Gobain Ceramics & Plastics, Inc. | Packing elements for mass transfer applications |
| EP4188598A1 (en) | 2020-07-29 | 2023-06-07 | Basf Se | Solid shaped body and use of the solid shaped body |
| US20230311108A1 (en) | 2020-07-29 | 2023-10-05 | Basf Se | Solid shaped body and use of the solid shaped body |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3907710A (en) * | 1973-04-18 | 1975-09-23 | Grace W R & Co | Hollow ceramic pellets for catalyst support |
-
1976
- 1976-05-07 FR FR7613747A patent/FR2350141A1/en active Granted
-
1977
- 1977-04-29 BE BE1008105A patent/BE854092A/en not_active IP Right Cessation
- 1977-05-02 DE DE19772719543 patent/DE2719543A1/en active Granted
- 1977-05-02 GB GB18315/77A patent/GB1513544A/en not_active Expired
- 1977-05-04 LU LU77250A patent/LU77250A1/xx unknown
- 1977-05-05 DK DK199377A patent/DK199377A/en not_active Application Discontinuation
- 1977-05-06 NL NLAANVRAGE7705031,A patent/NL180179C/en not_active IP Right Cessation
- 1977-05-06 IE IE923/77A patent/IE44836B1/en unknown
- 1977-05-06 IT IT23264/77A patent/IT1085539B/en active
Also Published As
| Publication number | Publication date |
|---|---|
| IE44836L (en) | 1978-11-07 |
| DK199377A (en) | 1977-11-08 |
| IT1085539B (en) | 1985-05-28 |
| FR2350141A1 (en) | 1977-12-02 |
| BE854092A (en) | 1977-10-31 |
| NL7705031A (en) | 1977-11-09 |
| GB1513544A (en) | 1978-06-07 |
| DE2719543A1 (en) | 1977-12-01 |
| LU77250A1 (en) | 1977-12-13 |
| DE2719543C2 (en) | 1987-10-01 |
| NL180179B (en) | 1986-08-18 |
| NL180179C (en) | 1987-01-16 |
| FR2350141B1 (en) | 1981-12-31 |
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