Method for preparing carbon molecular sieve adsorbent

A carbon molecular sieve and adsorbent technology, which is applied in the field of carbon molecular sieve adsorbent preparation, can solve the problems of high raw material cost and comprehensive cost, high raw material ash content, etc., and achieve the effects of low production cost, low pollution degree and cost reduction

Inactive Publication Date: 2009-12-09
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of raw coal production process needs to use selected raw coal, the cost of raw materials and comprehensive cost are high, the ash content of raw materials is high, about 5%, and the volatile content is low, about 35%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A method for preparing a carbon molecular sieve adsorbent is a method for preparing a carbon molecular sieve adsorbent with a high adsorption capacity for pressure swing adsorption, the steps of which are as follows:

[0035] (1), curing:

[0036] Using organic high molecular polymer as raw material, place it in a constant temperature drying oven at a temperature of 80 or 100 or 120 or 140 or 150°C, and cure for 4 or 5 or 6 or 7 hours to obtain a cured high molecular polymer. The organic macromolecular polymer is one of phenolic resin material, saran resin material or any mixture of two kinds thereof, preferably phenolic resin material, and phenolic resin material can adopt thermosetting phenolic resin, flower mud waste, industrial phenolic resin Foam and other industrial waste.

[0037] (2), dry distillation:

[0038] Grind the solidified high molecular polymer into particles below 1.5cm with a pulverizer, and carry out dry distillation. or 2 or 3 or 4h;

[0039] (3)...

Embodiment 2

[0049] (1), curing:

[0050] Use phenolic resin as raw material, cured at 80 or 90 or 100 or 110 or 120 or 130 or 150°C for 4 or 5 or 6 hours and then pulverized to particles below 1.5cm;

[0051] (2), dry distillation:

[0052] Dry distillation at 500 or 600 or 700 or 800 or 900°C for 1 or 2 or 3 or 4 hours;

[0053] (3), fine crushing:

[0054] Use ball milling or air milling to produce particles with a particle size of 3 or 4 or 5 or 6 or 7 or 8 microns;

[0055] (4), forming:

[0056] Mix with asphalt or tar at a mass ratio of 1:1 or 2:1 or 3:1, and then extrude with a hydraulic press at a pressure of 18 or 19 or 23 or 25MPa, and dry at 80°C for 5 or 6 or 8 hours Prepare carbonized raw materials;

[0057] (5), carbonization activation:

[0058] in N 2 In the protected state, the heating rate is 6 or 8 or 10 or 12 or 14 or 15 ℃ / min, the temperature is raised to 900 or 1000 or 1200 ℃ for carbonization, and the constant temperature time is 1 or 2 or 3 or 4 hours. On th...

Embodiment 3

[0063] (1), curing:

[0064] Use Saran resin as raw material, cured at 90 or 100 or 110 or 120 or 130 or 150°C for 4 or 5 or 6 or 7 hours and then pulverized to particles below 1.5 cm;

[0065] (2), dry distillation:

[0066] Dry distillation at 600 or 700 or 800 or 900°C for 1 or 2 or 3 or 4 hours;

[0067] (3), fine crushing:

[0068] Use ball milling or air milling to produce particles with a particle size of 3 or 4 or 5 or 6 microns;

[0069] (4), forming:

[0070] According to the mass ratio of 3:1 or 2:1, it is mixed with water-soluble starch, carboxymethyl cellulose, pitch, tar, kaolin, or any combination of two to five, and then extruded with a hydraulic press. 19 or 22 or 25 MPa, dry at 80°C for 5 or 7 or 8 hours to obtain carbonized raw materials;

[0071] (5), carbonization activation:

[0072] in N 2 In the protected state, the heating rate is 6 or 8 or 10 or 12 or 14 or 15 ℃ / min, the temperature is raised to 900 or 1100 or 1200 ℃ for carbonization, and the ...

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Abstract

The invention discloses a method for preparing a carbon molecular sieve adsorbent. The steps are as follows: (1) solidification: polymer is used as a raw material and is arranged in a thermostatic drying oven to be solidified; (2) dry distillation: the solidified macromoleclar polymer is pulverized by a pulverizer and then is processed by dry distillation; (3) fine pulverization: the macromoleclar polymer which is pulverized and processed by dry distillation is further processed by fine pulverization in the premise that the particle diameter of the macromoleclar polymer does not meet the requirement, and ball milling or gas milling is used for preparing micro-particles; (4) molding: the macromoleclar polymer which is processed by fine pulverization is mixed and uniformly stirred with agglomerant by mass ratio, and the mixture obtained is pressed and molded by an oil hydraulic press and then is dried; (5) carbonization and activation: under the state of N2 protection, temperature is raised for carbonization so as to increase the CMS surface area; and (6) carbon precipitation and hole adjustment: the hole adjustment agent is decomposed in the carbon molecular sieve for carbon deposition, the particle diameter is shortened and is enabled to be uniform, and the carbon molecular sieve product can be obtained after cooling. The carbon molecular sieve has the advantages of high CH4 adsorbing capacity, high selectivity factor of adsorption, favorable strength, low cost and no pollution, and the performance achieves or surpasses the standard of a sample of Japan carbon molecular sieve.

Description

technical field [0001] The invention relates to the technical field of separation and purification of industrial gases, and more specifically relates to a method for preparing a carbon molecular sieve adsorbent. The carbon molecular sieve prepared by the invention can be used as an adsorbent in the process of pressure swing adsorption enrichment gas, and has a high adsorption capacity for methane , for oxygen / methane (O 2 / CH 4 ) and nitrogen / methane (N 2 / CH 4 ) have separation coefficients greater than or equal to 5, respectively. Background technique [0002] At present, 70-90% of the methane associated with coal mines in my country is discharged due to low concentration (<20%) and no use value. This part of the gas is due to methane (CH 4 ) gas concentration is low, oxygen content is high, very close to CH 4 Explosive concentration of gas (5-16%) range or just in CH 4 It is within the explosive concentration range of gas, so it is difficult to use directly. As ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30C07C7/13C07C9/04
Inventor 李广学何杰张洪流刘银曹从伟叶俊
Owner ANHUI UNIV OF SCI & TECH
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