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Preparation method of high-specific-surface-area carbon molecular sieve for preparing nitrogen

A technology with high specific surface area and molecular sieve, which is applied in the field of carbon materials, can solve problems such as imperfect combination of process parameters, nitrogen concentration, nitrogen production, and unsatisfactory recovery performance, so as to facilitate subsequent treatment and realize waste Utilization, the effect of low ash content of raw materials

Active Publication Date: 2016-11-09
宁夏天利丰能源利用有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

After searching, the existing publicly disclosed manufacturing process of carbon molecular sieves for nitrogen production has imperfections in raw material selection, raw material ratio, and combination of process parameters, etc., resulting in the existing carbon molecular sieves for nitrogen production. , recovery rate and many other aspects of performance are not ideal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A preparation method for producing nitrogen-carbon molecular sieve with high specific surface area, comprising the following steps:

[0024] a. Raw material ratio; after mixing flower mud, coal and phenolic resin, heat at 350°C for 6-8 hours under nitrogen protection;

[0025] b, carry out planetary ball milling to above-mentioned sample, pulverize to 120 orders;

[0026] c. Add phenolic resin to the sample, knead and extrude it into pellets;

[0027] d. Place the sample in the furnace and heat up to 1080°C under nitrogen protection for carbonization;

[0028] e. Add the sample to the potassium hydroxide solution, add graphene, stir evenly, perform ball milling, filter, press filter and dry;

[0029] f. Place the sample in the converter, raise the temperature to 620°C under the protection of nitrogen, and activate it for 5.5 hours under the protection of nitrogen;

[0030] g. The sample is acid-washed with hydrochloric acid, and then washed with water until neutral t...

Embodiment 2

[0037] A preparation method for producing nitrogen-carbon molecular sieve with high specific surface area, comprising the following steps:

[0038] a. Raw material ratio; after mixing flower mud, coal and phenolic resin, heat at 400°C for 6 hours under nitrogen protection;

[0039] b, carry out planetary ball milling to above-mentioned sample, pulverize to 120 orders;

[0040] c. Add phenolic resin to the sample, knead and extrude it into pellets;

[0041] d. Place the sample in the furnace and heat up to 1100°C under nitrogen protection for carbonization;

[0042] e. Add the sample to the potassium hydroxide solution, add graphene, stir evenly, perform ball milling, filter, press filter and dry;

[0043] f. Place the sample in a converter, heat up to 600°C under nitrogen protection, and activate for 6 hours under nitrogen protection;

[0044] g. The sample is acid-washed with hydrochloric acid, and then washed with water until neutral to obtain a carbon molecular sieve.

...

Embodiment 3

[0051] A preparation method for producing nitrogen-carbon molecular sieve with high specific surface area, comprising the following steps:

[0052] a. Raw material ratio; after mixing flower mud, coal and phenolic resin, heat at 300°C for 8 hours under nitrogen protection;

[0053] b, carry out planetary ball milling to above-mentioned sample, pulverize to 120 orders;

[0054] c. Add phenolic resin to the sample, knead and extrude it into pellets;

[0055] d. Place the sample in the furnace and heat up to 1000°C under nitrogen protection for carbonization;

[0056] e. Add the sample to the potassium hydroxide solution, add graphene, stir evenly, perform ball milling, filter, press filter and dry;

[0057] f. Place the sample in a converter, heat up to 650°C under nitrogen protection, and activate for 5 hours under nitrogen protection;

[0058] g. The sample is acid-washed with hydrochloric acid, and then washed with water until neutral to obtain a carbon molecular sieve.

...

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Abstract

The invention discloses a preparation method of a high-specific-surface-area carbon molecular sieve for preparing nitrogen. The preparation method includes: sufficiently mixing flower mud materials, coal and phenolic resin, and using the mixture as the raw material. The preparation method has the advantages that the raw material is low in cost, the waste flower mud materials can be utilized, the raw material is low in ash content, and subsequent processing is benefited; by adding graphene during the activating process, the specific surface area of the carbon molecular sieve for preparing nitrogen reaches 3500-4000m<2> / g.

Description

technical field [0001] The invention relates to a preparation method of a molecular sieve, which belongs to the field of carbon materials, in particular to a preparation method of a nitrogen-producing carbon molecular sieve with a high specific surface area. Background technique [0002] Nitrogen-making carbon molecular sieve is a new type of activated carbon that almost only contains uniform micropores with a diameter of several angstroms. This pore characteristic can endow nitrogen-making carbon molecular sieve with selective adsorption performance according to its pore size and the molecular size and shape of the gas to be adsorbed. Taking advantage of this feature, nitrogen-producing carbon molecular sieves are widely used in various gas separation processes. After searching, the existing publicly available manufacturing process of carbon molecular sieves for nitrogen production has imperfections in raw material selection, raw material ratio, and combination of process ...

Claims

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Application Information

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IPC IPC(8): C01B31/02
CPCC01P2006/12
Inventor 钱林月任剑英
Owner 宁夏天利丰能源利用有限公司
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