Shaped heterogeneous catalysts
AssigneeJohnson Matthey PLC
InventorsDavid James Birdsall, Mileta Babovic, Mikael Per Uno Carlsson, Samuel Arthur French, Michiel Nijemeisland, William Maurice Sengelow, Edmund Hugh Stitt
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Abstract
A catalyst unit is described in the form of a cylinder having a length C and diameter D, which has one or more holes extending therethrough, wherein said cylinder has domed ends of lengths A and B, such that (A+B+C)/D is in the range 0.50 to 2.00, and (A+B)/C is in the range 0.40 to 5.00. The catalyst or catalyst unit preferably has one or more flutes miming along its length. The catalyst may be used particularly in steam reforming reactors.
Claims24
A catalyst unit in the form of a cylinder having a length C and diameter D, which has 3-10 circular holes extending therethrough, wherein said cylinder has domed ends of lengths A and B, such that (A+B+C)/D is in the range 0.50 to 2.00, and (A+B)/C is in the range 0.40 to 5.00.
A method of making a catalyst unit comprising the steps of (i) feeding a powdered material into a pelleting die, and (ii) compressing the powder to form a shaped unit, said die being shaped such that the catalyst unit is in the form of a cylinder having a length C and diameter D, which has 3-10 circular holes extending therethrough, and the cylinder has domed ends of lengths A and B, such that (A+B+C)/D is in the range 0.50 to 2.00, and (A+B)/C is in the range 0.40 to 5.00.
A catalytic process using a catalyst unit comprising contacting a reactant mixture with the catalyst unit under conditions to effect a catalysed reaction, wherein the catalyst unit has the form of a cylinder having a length C and diameter D, which has 3-10 circular holes extending therethrough, wherein said cylinder has domed ends of lengths A and B, such that (A+B+C)/D is in the range 0.50 to 2.00, and (A+B)/C is in the range 0.40 to 5.00.
Dependencies are inferred from the claim text.