METHOD AND APPARATUS FOR CARRYING OUT ENDOTHERMIC REACTIONS
First Claim
1. A method for carrying out an endothermic reaction, comprising:
- a) externally heating at least two reaction tubes, wherein the reaction tubes are arranged vertically in a heating chamber, and each of the reaction tubes is at least partially packed with a fluidizable material,b) introducing at least one gaseous reactant into the reaction tubes,c) forming a fluidized bed in the reaction tubes, each fluidized bed having an L/D ratio between the length L of the fluidized bed and the diameter D thereof from 3 to 30,d) carrying out an endothermic reaction in the reaction tubes at a first temperature (T1) and a first pressure (P1), wherein the reaction volume is distributed over at least two of the reaction tubes, to obtain a reaction product, ande) discharging the reaction product from the reaction tubes,wherein the reaction tubes can be combined to form groups which independently of one another are alternately operated in a production mode and/or in a regeneration mode or are idle.
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Abstract
The present invention relates to a method for carrying out endothermic reactions comprising the method steps of:
a) externally heating at least two reaction tubes (5), wherein the reaction tubes (5) have been arranged vertically in a heating chamber (3) and each of the reaction tubes (5) has been at least partially packed with a fluidizable material,
b) introducing at least one gaseous reactant (R) into the reaction tubes (5),
c) forming a fluidized bed (7) in the reaction tubes (5),
- d) carrying out the endothermic reaction in the reaction tubes (5) at a first temperature (T1) and a first pressure (P1), wherein the reaction volume has been distributed over at least two of the reaction tubes (5), and
e) discharging the reaction product (P) from the reaction tubes (5).
The present invention further relates to an apparatus (1) for carrying out endothermic reactions comprising at least one heating chamber (3), at least two reaction tubes (5), wherein the reaction tubes (5) have been arranged vertically in the heating chamber (3) and each of the reaction tubes (5) comprises an at least partial packing of a fluidizable material, at least one entry point (9) for gaseous reactants (R) for each reaction tube (5), at least one exit point (11) for reaction products (P) for each reaction tube (5) and at least one heating apparatus (13) for externally heating the reaction tubes (5).
The present invention further provides for the use of the apparatus (1) according to the invention for the non-oxidative dehydroaromatization of C1 to C4 aliphatics.
8 Citations
17 Claims
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1. A method for carrying out an endothermic reaction, comprising:
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a) externally heating at least two reaction tubes, wherein the reaction tubes are arranged vertically in a heating chamber, and each of the reaction tubes is at least partially packed with a fluidizable material, b) introducing at least one gaseous reactant into the reaction tubes, c) forming a fluidized bed in the reaction tubes, each fluidized bed having an L/D ratio between the length L of the fluidized bed and the diameter D thereof from 3 to 30, d) carrying out an endothermic reaction in the reaction tubes at a first temperature (T1) and a first pressure (P1), wherein the reaction volume is distributed over at least two of the reaction tubes, to obtain a reaction product, and e) discharging the reaction product from the reaction tubes, wherein the reaction tubes can be combined to form groups which independently of one another are alternately operated in a production mode and/or in a regeneration mode or are idle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 16)
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11. An apparatus suitable for carrying out endothermic reactions comprising
at least one heating chamber, at least two reaction tubes, wherein the reaction tubes are arranged vertically in the heating chamber, and each of the reaction tubes comprises an at least partial packing of a fluidizable material to form a fluidized bed, each fluidized bed having a L/D-ratio of its length L and its diameter D from 3 to 30, at least one entry point for gaseous reactants for each reaction tube, at least one exit point for reaction products for each reaction tube and at least one heating apparatus for externally heating the reaction tubes, wherein the apparatus can be divided into segments which can be switched between production mode and regeneration mode independently of one another.
Specification