Heat storage in chemical reactors

Patent metadata

Field	Value
Publication number	US-12269984-B2
Application number	US-202418595051-A
Country	US
Kind code	B2
Filing date	Mar 4, 2024
Priority date	Nov 20, 2019
Publication date	Apr 8, 2025
Grant date	Apr 8, 2025

Abstract

A process for producing olefins may include dehydrogenating a first alkane in a first reactor to produce a first effluent comprising at least one of a first n-olefin or a first diolefin; removing the first effluent from the first reactor; and regenerating the first reactor. The first reactor may include a first dehydrogenation catalyst and a first phase change material.

First claim

What is claimed is:

1. A dehydrogenation reactor, comprising a reaction zone containing:
a dehydrogenation catalyst; and
a phase change material, wherein the phase change material undergoes a phase transition at a temperature of 525° C. or more and 675° C. or less, and wherein the phase change material comprises barium chloride and calcium chloride.

2. The dehydrogenation reactor according to claim 1 , wherein the reactor contains the phase change material in an amount of 5 to 30 wt. %, relative to the total weight of the dehydrogenation catalyst.

3. The dehydrogenation reactor of claim 1 , wherein the reactor contains the phase change material in an amount of 5 to 30 vol. %, relative to the total volume of the dehydrogenation catalyst.

4. The dehydrogenation reactor of claim 1 , wherein the phase change material undergoes a phase transition at a temperature of 550° C. or more and 650° C. or less.

5. The dehydrogenation reactor of claim 1 , wherein the phase change material undergoes a phase transition at a temperature of 600° C. or more and 620° C. or less.

6. The dehydrogenation reactor of claim 1 , wherein the phase change material is encapsulated.

7. The dehydrogenation reactor of claim 1 , wherein the reaction zone further contains a heat-generating material.

8. The dehydrogenation reactor of claim 7 , wherein the heat-generating material is an inert composition under dehydrogenation reaction conditions, and comprises one or more of copper, chromium, molybdenum, vanadium, cerium, yttrium, scandium, tungsten, manganese, iron, cobalt, nickel, silver, or bismuth.

9. The dehydrogenation reactor of claim 7 , wherein the reactor contains the heat-generating material in an amount in a range from 1 wt % to 20 wt %.

10. A dehydrogenation reaction system, comprising:
a reactor comprising a fixed bed reaction zone containing first dehydrogenation catalyst particles disposed around sealed containers housing a first phase change material, wherein the sealed containers comprise sealed tubes that are spaced apart and arranged in a grid pattern within the fixed bed reaction zone.

11. The system of claim 10 , wherein the first reactor contains the first phase change material in an amount of 5 to 30 wt. %, relative to the total weight of the dehydrogenation catalyst.

12. The system of claim 10 , wherein the first reactor contains the first phase change material in an amount of 5 to 30 vol. %, relative to the total volume of the dehydrogenation catalyst.

13. The system of claim 10 , wherein the particles of first dehydrogenation catalyst fill a space between the sealed containers.

14. The system of claim 10 , wherein the sealed tubes comprise sealed cylindrical tubes.

15. The system of claim 10 , wherein the fixed bed reaction zone further contains a heat-generating material.

16. The system of claim 15 , wherein the heat-generating material is an inert composition under dehydrogenation reaction conditions, and comprises one or more of copper, chromium, molybdenum, vanadium, cerium, yttrium, scandium, tungsten, manganese, iron, cobalt, nickel, silver, or bismuth.

17. The system of claim 15 , wherein the fixed bed reaction zone contains the heat-generating material in an amount in a range from 1 wt % to 20 wt %.

18. A dehydrogenation reaction system, comprising:
a reactor comprising a fixed bed reaction zone containing first dehydrogenation catalyst particles disposed around sealed containers housing a first phase change material, wherein the sealed containers are spaced apart and arranged in a grid pattern within the fixed bed reaction zone.

Assignees

• Lummus Technology Inc

Inventors

• Podrebarac Gary George

Classifications

• C07C5/333

  Catalytic processes · CPC title

• C07C9/12

  Iso-butane · CPC title

• C07C9/08

  Propane · CPC title

• C01F11/24

  Chlorides · CPC title

• B01J2208/065

  Heating or cooling the reactor · CPC title