Directly electrical heated reactor

Patent metadata

Field	Value
Publication number	US-12296328-B2
Application number	US-202017595882-A
Country	US
Kind code	B2
Filing date	May 27, 2020
Priority date	Jun 5, 2019
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

The invention relates to a reactor comprising a moving bed of solid particles that move in the direction of gravitation, and to a method for heating a reactor that comprises a moving bed, for the purpose of pyrolysis reactions.

First claim

The invention claimed is:

1. A reactor for carrying out a pyrolysis reaction, the reactor comprising:
a high end and a low end;
a reaction zone having a length and varying flow cross-sections over the length;
a moving bed of solid particles having an outlet at the low end of the reactor and configured to move in a high end to low end downward direction;
electrical electrodes disposed in an annularly concentric configuration within the reaction zone; and
an educt inlet for gaseous educts and a product outlet for products, wherein the educt inlet and the product outlet are disposed in a manner so that in operation, an educt and product stream can move in a low end to high end upward direction in counterflow relative to a movement of the moving bed in the high end to low end downward direction.

2. The reactor according to claim 1 , wherein the electrical electrodes have a length, varying conductivities over the length, and contain a graphite-containing material.

3. The reactor according to claim 1 , wherein the varying flow cross-sections of the reactor change over the length of the reaction zone such that the varying flow cross-sections have a conical or nearly conical shape.

4. The reactor according to claim 1 , further comprising a plurality of supply lines for supplying a refrigerant gas to the reactor, wherein the plurality of supply lines are near the product outlet.

5. The reactor according to claim 1 , wherein the reactor has a conical part and a cone having a wide part, and the moving bed has a supply region, the conical part arranged such that the wide part of the cone is arranged in the supply region of the moving bed.

6. A method of heating the moving bed of particles through the reactor of claim 1 and of carrying out a pyrolysis reaction the method comprising heating the moving bed by passing the moving bed through the reactor whereby the moving bed is heated by the electrical electrodes and a pyrolysis reaction is carried out.

7. The method according to claim 6 , further comprising guiding the moving bed in counterflow relative to a moving direction of the educt and product stream.

8. The method according to claim 6 , wherein the heating the moving bed is performed by heating the moving bed to a temperature of not less than 900 C and not more than 1200 C.

9. The method according to claim 6 , further comprising using a gas stream educt containing methane, and performing a methane pyrolysis using the reactor.

10. The method according to claim 6 , further comprising cooling an exiting product stream by supplying a refrigerant gas near the product outlet.

11. The reactor according to claim 1 , wherein the solid particles are capable of passing in bulk through the reaction zone in a direction of gravitation.

12. The reactor according to claim 1 , wherein the moving bed has a supply region and wherein the varying flow cross sections of the reactor vary over the length of the reaction zone such that the reaction zone has a conical shape, the reactor further comprising a cone having a wide part wherein the wide part of the cone is arranged in the supply region of the moving bed.

13. The reactor according to claim 1 , wherein the electrical electrodes are configured to heat the moving bed in the reaction zone.

14. The method of claim 6 , further comprising withdrawing the moving bed directly from the reactor wherein prior to the withdrawing of the moving bed, due to heat exchange between a stream and the moving bed, the moving bed has a temperature lower than prior to the heat exchange between the stream and the moving bed.

Assignees

• Basf Se

Inventors

• Posselt Heinz
• Machhammer Otto
• Weikl Markus
• Antweiler Nicolai
• Büker Karsten

Classifications

• C01B3/24

  of hydrocarbons · CPC title

• B01J2219/083

  cylindrical · CPC title

• B01J2208/00407

  outside the reactor bed · CPC title

• B01J2208/00389

  using electric heating or cooling elements · CPC title

• B01J19/087

  employing electric or magnetic energy · CPC title