Core-shell cobalt catalysts for Fischer-Tropsch synthesis reaction and preparing method thereof

Patent metadata

Field	Value
Publication number	US-10137440-B2
Application number	US-201514983849-A
Country	US
Kind code	B2
Filing date	Dec 30, 2015
Priority date	Jul 29, 2015
Publication date	Nov 27, 2018
Grant date	Nov 27, 2018

Abstract

The present invention relates to a core-shell cobalt catalyst used for a Fischer-Tropsch synthesis reaction and a method for preparing the same. More particularly, it relates to a cobalt catalyst, which has a core-shell structure including a cobalt-supported and sintered alumina particle as a core and a zeolite powder coated on the surface of the alumina particle to a thickness of 50 μm or greater through mechanical alloying as a shell and is used to prepare hydrocarbons with high octane numbers through a Fischer-Tropsch synthesis reaction, and a method for preparing the same.

First claim

What is claimed is:

1. A core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction, which comprises
a core composed of a spherical, cobalt-supported and sintered alumina particle having a diameter of 1-5 mm;
a shell composed of a zeolite powder having a SiO2/Al2O3 molar ratio of 5-40 coated on the surface of the core to a thickness of 50-300 μm through a mechanical alloying process; and
a bimodal porous structure with the core having mesopores with an average pore size of 10.5-21.1 nm and a pore volume of 0.18-0.37 cm 3 /g, and the shell having micropores with an average pore size of 0.6-0.82 nm and with a pore volume of 0.057-0.116 cm 3 /g.

2. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 1 , wherein the alumina particle constituting the core is an α- or γ-alumina particle.

3. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 1 , wherein the zeolite powder coated through the mechanical alloying process is ZSM-5 zeolite.

4. A core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction, which comprises:
a spherical, cobalt-supported and sintered alumina particle having a diameter of 1-5 mm as a core;
a zeolite powder having a SiO2/Al2O3 molar ratio of 5-40 coated on the surface of the core to a thickness of 50-300 μm through a mechanical alloying process as a shell; and
a bimodal porous structure with the core having mesopores with an average pore size of 10.5-21.1 nm and the shell having micropores with an average pore size of 0.6-0.82 nm.

5. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 4 , wherein the core comprises a cobalt active metal infiltrated in the core at an amount of 2-20 wt % with respect to the amount of alumina support in the core.

6. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 4 , wherein the core comprises a cobalt active metal infiltrated in the core at an amount of 5-10 wt % with respect to the amount of alumina support in the core.

7. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 4 , wherein core having mesopores with a pore volume of 0.18-0.37 cm 3 /g.

8. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 4 , wherein shell having micropores with a pore volume of 0.057-0.116 cm 3 /g.

9. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 4 , wherein core having a specific surface area of 47-163 m 2 /g.

10. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 4 , wherein shell having a specific surface area of 173-251 m 2 /g.

11. A core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction, which comprises
a core composed of a spherical cobalt-supported sintered alumina particle;
a shell from zeolite powder having a SiO2/Al2O3 molar ratio of 5-40 coated on the surface of the core to a thickness of 50-300 μm; and
a bimodal porous structure with the core having mesopores with an average pore size of 10.5-21.1 nm and the core having a specific surface area of 47-163 m 2 /g, and the shell having micropores with an average pore size of 0.6-0.82 nm and the shell having a specific surface area of 173-251 m 2 /g.

12. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 11 , wherein the zeolite powder is ZSM-5 zeolite.

13. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 11 , wherein the alumina particle of the core is an α- or γ-alumina particle.

14. The core-shell cobalt catalyst for a Fischer-Tropsch synthesis reaction according to claim 11 wherein the zeolite powder has a SiO2/Al2O3 molar ratio of 5-40 and is coated on the surface of the core to a thickness of 50-300 μm through a mechanical alloying process.

Assignees

• Korea Inst Sci & Tech

Inventors

• Moon Dong Ju
• Jung Jae Sun
• Lee Jae Suk
• Hong Gi Hoon
• Yang Eun Hyeok
• Lim Sung Soo
• Noh Young Su
• Lee Kwang Hyeok
• Lee Sang Yong
• Kim Na Young

Classifications

• B01J29/072

  Iron group metals or copper · CPC title

• B01J35/1061

  Operations & Transport · mapped topic

• B01J35/1057

  Operations & Transport · mapped topic

• B01J35/109

  Operations & Transport · mapped topic

• B01J29/46 Primary

  Iron group metals or copper · CPC title