Method for manufacturing activated carbon

Patent metadata

Field	Value
Publication number	US-10086357-B2
Application number	US-201615248475-A
Country	US
Kind code	B2
Filing date	Aug 26, 2016
Priority date	Apr 5, 2016
Publication date	Oct 2, 2018
Grant date	Oct 2, 2018

Abstract

An activated carbon manufacturing method may include preparing activated carbon precursors, carbonizing the activated carbon precursors by performing a heat treatment on the activated carbon precursors, equalizing the activated carbon precursors which were carbonized, in the carbonizing, by grinding the activated carbon precursors, activating the activated carbon precursors by inserting an oxidizing agent and distilled water into the equalized activated carbon precursors, and performing a heat treatment on the activated carbon precursors, and introducing a nitrogen-based functional group into a surface of the activated carbon precursors by mixing the activated carbon precursors, a nitrogen material, and a solvent to perform reaction on the activated carbon precursors.

First claim

What is claimed is:

1. An activated carbon manufacturing method comprising:
preparing activated carbon precursors;
carbonizing the activated carbon precursors by performing a heat treatment on the activated carbon precursors to obtain a carbonized material;
equalizing the carbonized material, by grinding the carbonized material to obtain an equalized material;
activating the equalized material by inserting an oxidizing agent and distilled water into the equalized material, and performing a heat treatment on the equalized material to obtain an activated material; and
introducing a nitrogen-based functional group into a surface of the activated material by mixing the activated material, a nitrogen material, a solvent, and an acid to perform a reaction on the activated material.

2. The activated carbon manufacturing method of claim 1 , wherein, in the activating the equalized material step, the oxidizing agent is selected from the group consisting of H 2 O 2 , HNO 3 , O 3 , N 2 O, H 2 SO 4 , F 2 , Cl 2 , and a combination thereof.

3. The activated carbon manufacturing method of claim 1 , wherein, in the activating the equalized material step, a volume of the oxidizing agent is in a range of 10% volume to 50% volume of a total of 100% volume of the oxidizing agent and the distilled water.

4. The activated carbon manufacturing method of claim 1 , wherein the activating is performed at a temperature in a range of 700° C. to 1000° C.

5. The activated carbon manufacturing method of claim 1 , wherein the activating is performed while injecting a mixture of the oxidizing agent and the distilled water into the equalized material at a speed in a range of 1 ml/hr to 100 ml/hr.

6. The activated carbon manufacturing method of claim 5 , wherein the activating is performed under a pressure in a range of 0 bar to 5 bar.

7. The activated carbon manufacturing method of claim 1 , wherein the activating is performed for a time period in a range of 1 hr to 5 hrs.

8. The activated carbon manufacturing method of claim 1 , wherein, in the introducing the nitrogen-based functional group, the nitrogen material is selected from the group consisting of an amine-based compound, polypyrrole, poly(vinylidene fluoride), poly(vinylidene fluoride-co-hexafluoropropylene), poly(vinylidene chloride-co-acrylonitrile), poly(vinylidene chloride-co-acrylonitrile-co-methyl methacrylate), poly(vinylidene chloride-co-vinyl chloride), poly(vinylidene chloride-co-methyl acrylate), and a combination thereof.

9. The activated carbon manufacturing method of claim 1 , wherein the introducing of the nitrogen-based functional group is performed at a temperature in a range of 60° C. to 120° C.

10. The activated carbon manufacturing method of claim 1 , wherein, in the introducing of the nitrogen-based functional group step, a mixing ratio of the nitrogen material is in a range of 0.1% weight to 20% weight of a mixing ratio of 100% weight of the activated material.

11. The activated carbon manufacturing method of claim 1 , wherein, in the introducing of the nitrogen-based functional group, the solvent comprises a hydroxyl group (—OH).

12. The activated carbon manufacturing method of claim 11 , wherein the solvent is selected from the group consisting of ethanol, ethyleneglycol, diethyleneglycol, polyethyleneglycol, 1,2-propanediol, dodacanediol, and a combination thereof.

13. The activated carbon manufacturing method of claim 1 , wherein the acid is selected from the group consisting of hydrochloric acid, sulfuric acid, and a mixture thereof.

14. The activated carbon manufacturing method of claim 1 , further comprising selecting the equalized material by using a sieve having a size in a range of 100 μm to 250 μm, after the grinding of the equalized material.

15. The activated carbon manufacturing method of claim 1 , wherein the equalizing is performed using a ball mill, and a particle size of a ball used for the ball mill is in a range of 1 mm to 20 mm.

16. The activated carbon manufacturing method of claim 15 , wherein, in the equalizing the carbonized material step, a volume of the carbonized material is in a range of 0.1% volume to 40% volume of a total of 100% volume of the carbonized material and the ball mill, in the equalizing.

17. The activated carbon manufacturing method of claim 15 , wherein, in the equalizing the carbonized material step, a processing speed for the ball mill is in a range of 100 rpm to 500 rpm.

18. The activated carbon manufacturing method of claim 15 , wherein, in the equalizing the carbonized material step, a processing time period for the ball mill is in a range of 30 min to 5 hrs, in the equalizing.

19. The activated carbon manufacturing method of claim 1 , wherein the carbonizing is performed at a temperature that is in a range of 700° C. to 1000° C.

20. The activated carbon manufacturing method of claim 1 , wherein, in the preparing of the activated carbon precursor step, the activated carbon precursors are selected from the group consisting of starch, coconut husks, citrus peel, coffee grounds, bamboo stems, and a combination thereof.

Assignees

• Hyundai Motor Co Ltd
• Inha Ind Partnership Inst

Inventors

• Bae Shin Tae
• Heo Young Jung
• Park Soo Jin

Classifications

• C01B32/354

  After-treatment · CPC title

• B01J20/3064

  Addition of pore forming agents, e.g. pore inducing or porogenic agents · CPC title

• B01D2253/102

  Carbon · CPC title

• B01D2257/504

  Carbon dioxide · CPC title

• B60H3/06

  Filtering · CPC title