Apparatus for producing lower olefin-containing gas and method for producing lower olefin-containing gas

Patent metadata

Field	Value
Publication number	US-11925930-B2
Application number	US-201917299674-A
Country	US
Kind code	B2
Filing date	Dec 3, 2019
Priority date	Dec 3, 2018
Publication date	Mar 12, 2024
Grant date	Mar 12, 2024

Abstract

In an apparatus, a gas containing CH 4 and CO 2 is supplied from a first supply unit to a synthetic gas production unit which generates a synthetic gas containing CO and H 2 while heating a first catalytic structure; the synthetic gas is supplied to a gas production unit which generates a lower olefin-containing gas including propylene while heating a second catalytic structure; and a detection unit detects propylene discharged from the gas production unit. The first catalytic structure includes first supports having a porous structure and a first metal fine particle that is present in first channels of the first supports. The second catalyst structure includes second supports having a porous structure and a second metal fine particle in the second supports. The second supports have a second channels, a portion of which have an average inner diameter of 0.95 nm or less.

First claim

The invention claimed is:

1. An apparatus for producing a lower olefin-containing gas containing propylene, the apparatus comprising:
a first supply unit that supplies a raw material gas comprising methane and carbon dioxide;
a synthesis gas production unit that comprises a first catalyst structure, receives supply of the raw material gas from the first supply unit, and produces a synthesis gas comprising carbon monoxide and hydrogen from methane and carbon dioxide in the raw material gas while heating the first catalyst structure;
a second supply unit that supplies the synthesis gas discharged from the synthesis gas production unit;
a lower olefin-containing gas production unit that comprises a second catalyst structure, receives supply of the synthesis gas from the second supply unit, and produces, from carbon monoxide and hydrogen in the synthesis gas, a lower olefin-containing gas containing propylene while heating the second catalyst structure; and
a first detection unit that detects propylene in the lower olefin-containing gas discharged from the lower olefin-containing gas production unit, wherein
the first catalyst structure includes first supports each having a porous structure and including a zeolite-type compound, and at least one first catalytic material present in the first supports,
the first supports have first channels communicating with outside the first supports,
the at least one first catalytic material is in the form of first metal fine particle and is present at least in the first channels of the first supports,
the second catalyst structure includes second supports each having a porous structure and including a zeolite-type compound, and at least one second metal fine particle present in the second supports,
the second supports have second channels communicating with outside the second supports, and
some of the second channels have an average inner diameter of 0.95 nm or less.

2. The apparatus for producing the lower olefin-containing gas according to claim 1 , further comprising an oxygen supply unit that supplies oxygen to the synthesis gas production unit.

3. The apparatus for producing the lower olefin-containing gas according to claim 2 , wherein the oxygen supply unit supplies, to the synthesis gas production unit, oxygen at a concentration below an explosive limit.

4. The apparatus for producing the lower olefin-containing gas according to claim 1 , wherein the synthesis gas production unit heats the first catalyst structure at 600° C. or more and 1000° C. or less.

5. The apparatus for producing the lower olefin-containing gas according to claim 1 , wherein the first metal fine particle is a fine particle comprising at least one metal selected from the group consisting of rhodium (Rh), ruthenium (Ru), iridium (Ir), palladium (Pd), platinum (Pt), iron (Fe), cobalt (Co), and nickel (Ni).

6. The apparatus for producing the lower olefin-containing gas according to claim 1 , wherein
the first channels have any one of a one-dimensional pore, a two-dimensional pore, and a three-dimensional pore of a framework structure of the zeolite-type compound, and have a first enlarged pore portion different from the one-dimensional pore, the two-dimensional pore, and the three-dimensional pore, and
the at least one first catalytic material is present at least in the first enlarged pore portion.

7. The apparatus for producing the lower olefin-containing gas according to claim 6 , wherein the first enlarged pore portion connects a plurality of pores constituting any one of the one-dimensional pore, the two-dimensional pore, and the three-dimensional pore.

8. The apparatus for producing the lower olefin-containing gas according to claim 6 , wherein the first metal fine particle has an average particle size larger than an average inner diameter of the first channels and equal to or smaller than an inner diameter of the first enlarged pore portion.

9. The apparatus for producing the lower olefin-containing gas according to claim 1 , further comprising a separation unit that separates methane and carbon dioxide in the synthesis gas discharged from the synthesis gas production unit.

10. The apparatus for producing the lower olefin-containing gas according to claim 9 , further comprising a third supply unit that supplies, to the synthesis gas production unit, methane and carbon dioxide separated by the separation unit.

11. The apparatus for producing the lower olefin-containing gas according to claim 1 , further comprising a second detection unit that detects carbon monoxide and hydrogen in the synthesis gas discharged from the synthesis gas production unit.

12. The apparatus for producing the lower olefin-containing gas according to claim 1 , wherein the lower olefin-containing gas production unit heats the second catalyst structure at 180° C. or more and 500° C. or less.

13. The apparatus for producing the lower olefin-containing gas according to claim 1 , wherein
the at least one second metal fine particle comprises at least one first metal selected from the group consisting of ruthenium (Ru), nickel (Ni), iron (Fe), and cobalt (Co) or
comprises at least one first metal selected from the group consisting of ruthenium (Ru), nickel (Ni), iron (Fe), and cobalt (Co) and at least one second metal being different from the first metal and selected from the group consisting of platinum (Pt), palladium (Pd), gold (Au), silver (Ag), copper (Cu), ruthenium (Ru), iridium (Ir), rhodium (Rh), osmium (Os), zirconium (Zr), and manganese (Mn).

14. The apparatus for producing the lower olefin-containing gas according to claim 1 , wherein some of the second channels have an average inner diameter of 0.39 nm or more and 0.75 nm or less.

15. The apparatus for producing the lower olefin-containing gas according to claim 1 , wherein
the second channels have any one of a one-dimensional pore, a two-dimensional pore, and a three-dimensional pore of a framework structure of the zeolite-type compound, and have a second enlarged pore portion different from the one-dimensional pore, the two-dimensional pore, and the three-dimensional pore, and
the at least one second metal fine particle is present at least in the second enlarged pore portion.

16. The apparatus for producing the lower olefin-containing gas according to claim 1 , further comprising a second separation unit that separates carbon monoxide and hydrogen in the lower olefin-containing gas discharged from the lower olefin-containing gas production unit.

17. The apparatus for producing the lower olefin-containing gas according to claim 16 , further comprising a third supply unit that supplies, to the lower olefin-containing gas production unit, carbon monoxide and hydrogen separated by the separation unit.

18. The apparatus for producing the lower olefin-containing gas according to claim 1 , further comprising a separation unit that separates methane and carbon dioxide in the lower olefin-containing gas discharged from the lower olefin-containing gas production unit.

19. The apparatus for producing the lower olefin-containing gas according to claim 18 , further comprising a third supply unit that supplies, to the synthesis gas production unit, methane and carbon dioxide separated by the separation unit.

20. The apparatus for producing the lower olefin-containing gas according to claim 1 , further comprising a separation unit that cools the lower olefin-containing gas discharged from the lower olefin-containing gas production unit and separates a liquid and a gas includin

Assignees

• Furukawa Electric Co Ltd

Inventors

• BANBA Yuichiro
• Sekine Kaori
• Nakai Yukako
• NISHII Mai
• Fukushima Masayuki
• Kato Sadahiro
• Masuda Takao
• Nakasaka Yuta
• Yoshikawa Takuya

Classifications

• B01J35/45

  Nanoparticles · CPC title

• B01J35/56

  Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths · CPC title

• B01J8/0278 Primary

  Feeding reactive fluids (for solid material B01J8/0015) · CPC title

• B01J8/0285

  Heating or cooling the reactor (for tubular reactors in furnaces B01J8/062) · CPC title

• B01J23/892

  Nickel and noble metals · CPC title