A mesoporous carbon material and its preparation method and application

Abstract

The present disclosure relates to a mesoporous carbon material, a preparation method thereof, and uses thereof. The mesoporous carbon material contains carbon, oxygen, hydrogen, sulfur, nitrogen, and phosphorus. Based on the total weight of the mesoporous carbon material, the carbon content is 80-90% by weight, preferably 82-88% by weight; the oxygen content is 2-6% by weight, preferably 3-5% by weight; the hydrogen content is 0.1-1% by weight, preferably 0.2-0.8% by weight; the sulfur content is 1-8% by weight, preferably 2-6% by weight; the nitrogen content is 0.5-3% by weight, preferably 1-2.5% by weight; and the phosphorus content is 0.5-10% by weight, preferably 1-6% by weight. The present disclosure provides a new mesoporous carbon material having a larger pore size (above 6 nm) and can be used as an adsorbent, catalyst, or catalyst carrier.

Claims

1. A mesoporous carbon material, characterized in that The mesoporous carbon material contains carbon, oxygen, hydrogen, sulfur, nitrogen and phosphorus. Based on the total weight of the mesoporous carbon material, the carbon content is 80-90% by weight, the oxygen content is 2-6% by weight, the hydrogen content is 0.1-1% by weight, the sulfur content is 1-8% by weight, the nitrogen content is 0.5-3% by weight, and the phosphorus content is 0.5-10% by weight. The specific surface area of ​​the mesoporous carbon material is 50 to 1200 m 2 / g; pore volume is 0.3~1.3 cm 3 / g; the pore size is 2 to 30 nm; The mesoporous carbon material is prepared by a method comprising the following steps: Mixing a carbon source, a phosphorus source, and a binder to obtain a mixed material, wherein the carbon source comprises at least one of asphalt powder, petroleum coke powder, an oxidative thermal product of asphalt powder, or an oxidative thermal product of petroleum coke powder; and the phosphorus source is a phosphorus-containing compound, and the phosphorus-containing compound comprises at least one of phosphoric acid, a phosphate, or a phosphorus-containing organic compound; The mixed material is heat-treated in an oxygen-containing atmosphere to obtain the mesoporous carbon material.

2. The mesoporous carbon material according to claim 1, characterized in that Based on the total weight of the mesoporous carbon material, the content of the carbon element is 82 to 88 weight %; the content of the oxygen element is 3 to 5 weight %; the content of the hydrogen element is 0.2 to 0.8 weight %; the content of the sulfur element is 2 to 6 weight %; the content of the nitrogen element is 1 to 2.5 weight %; and the content of the phosphorus element is 1 to 6 weight %.

3. The mesoporous carbon material according to claim 1, characterized in that The specific surface area of ​​the mesoporous carbon material is 100 to 1000 m 2 / g; pore volume is 0.4~1.2 cm 3 / g; the pore diameter is 6 to 20 nm.

4. A method for preparing the mesoporous carbon material according to any one of claims 1 to 3, characterized in that: The method includes: Mixing a carbon source, a phosphorus source, and a binder to obtain a mixed material, wherein the carbon source comprises at least one of asphalt powder, petroleum coke powder, an oxidative thermal product of asphalt powder, or an oxidative thermal product of petroleum coke powder; and the phosphorus source is a phosphorus-containing compound, and the phosphorus-containing compound comprises at least one of phosphoric acid, a phosphate, or a phosphorus-containing organic compound; heat-treating the mixed material in an oxygen-containing atmosphere to obtain the mesoporous carbon material; Relative to 100 parts by weight of the carbon source, the amount of the phosphorus source is 0.5 to 8 parts by weight, calculated as phosphorus pentoxide; the amount of the binder is 1 to 20 parts by weight.

5. The method according to claim 4, characterized in that Relative to 100 parts by weight of the carbon source, the amount of the phosphorus source is 1 to 6 parts by weight, calculated as phosphorus pentoxide; the amount of the binder is 5 to 15 parts by weight.

6. The method according to claim 4, characterized in that The particle size of the carbon source is 1 to 1000 μm.

7. The method according to claim 6, characterized in that The particle size of the carbon source is 1 to 250 μm.

8. The method according to claim 4, characterized in that The binder includes at least one of cellulose ether, starch or enol polymer.

9. The method according to claim 8, characterized in that The binder is cellulose ether.

10. The method according to claim 9, characterized in that The binder is at least one of methyl cellulose, hydroxyethyl methyl cellulose or hydroxypropyl methyl cellulose.

11. The method according to claim 4, characterized in that The asphalt powder includes petroleum asphalt powder and / or coal asphalt powder. The asphalt powder contains polycyclic aromatic hydrocarbons. Based on the total weight of the asphalt powder, the content of the polycyclic aromatic hydrocarbons is 70 to 100% by weight.

12. The method according to claim 11, characterized in that The asphalt powder contains polycyclic aromatic hydrocarbons. Based on the total weight of the asphalt powder, the content of the polycyclic aromatic hydrocarbons is 85 to 100 weight %.

13. The method according to any one of claims 4 to 12, characterized in that The step of heat-treating the mixed material in an oxygen-containing atmosphere to obtain the mesoporous carbon material comprises: In an oxygen-containing atmosphere, raising the temperature of the mixed material from room temperature to 120-450° C. at a heating rate of 0.1-10° C. / min, and performing a first heat treatment for 0.1-48 hours to obtain an intermediate product; In an oxygen-containing atmosphere, the temperature of the intermediate product is raised to 700-1000° C. at a heating rate of 0.1-10° C. / min, and a second heat treatment is performed for 0.1-12 hours to obtain the mesoporous carbon material.

14. The method according to claim 13, characterized in that The oxygen-containing atmosphere contains an oxygen-containing gas, or a mixture of an oxygen-containing gas and an inert gas, wherein the oxygen-containing gas includes at least one of oxygen, carbon dioxide and carbon monoxide; and the inert gas includes at least one of nitrogen, argon and helium.

15. Use of the mesoporous carbon material according to any one of claims 1 to 3 or the mesoporous carbon material prepared by the method according to any one of claims 4 to 14 in the preparation of an adsorbent, a catalyst or a catalyst carrier.