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Carbon molecular sieve for concentrating and extracting CH4 from coal bed gas and preparation method thereof

A technology of carbon molecular sieve and air mill, which is applied in separation methods, carbon preparation/purification, adsorption purification/separation, etc., can solve the problems of waste of resources, environmental pollution, etc., and achieve the effects of reduced operating costs, low prices, and simple processes

Inactive Publication Date: 2013-05-08
CCTEG CHINA COAL RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at separating CH by pressure swing adsorption at present 4 / N 2 This puzzle provides a way to be able to use CH 4 / N 2 Separated carbon molecular sieve and preparation method thereof; the carbon molecular sieve prepared by the method has an 2 With high diffusion coefficient, selective adsorption of N 2 , methane gas can be directly enriched and recovered at the top of the tower, and its performance can meet the requirements of industrial pressure swing adsorption; at the same time, this method uses phenolic resin industrial waste as raw material, which can solve the problems of environmental pollution and resource waste caused by waste at present

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Example 1. Preparation of carbon molecular sieve

[0028] The collected phenolic resin waste (flesh scraps) is pulverized into granular materials less than 2cm with a pulverizer, dried in a constant temperature drying oven at 150°C for 0.5h, and the dried materials are ground in a ball mill into powdered materials. The water content is 0.5%, and the particle size of the powdery material is controlled at 5~37μm. Put the powdery material, coal tar and liquid phenolic resin binder and water into the kneader to knead, powdery material / binder / water According to the mass part of 100 / 42 / 10, after kneading, it is formed into a cylindrical material with a diameter of 1.8mm and a height of 5mm. The material is charged into a rotary carbonization furnace and heated to 320 at a temperature rise rate of 5-8℃ / min ℃, constant temperature for 20 minutes, nitrogen gas, and then at the same heating rate of 5~8℃ / min to 650℃, keep the temperature at this temperature for 45 minutes, then under...

Embodiment 2

[0030] Example 2. Preparation of carbon molecular sieve

[0031] The collected phenolic resin waste materials (phenolic resin insulation materials) are pulverized into granular materials less than 2cm with a pulverizer, dried in a constant temperature drying oven at 120°C for 1 hour, and the dried materials are ground in a ball mill into powder materials , The water content is 1.0%, and the particle size of the powdery material is controlled within 5~37μm. Put the powdery material, coal tar and water-soluble starch binder and water into the kneader for kneading, the powdery material / binder / The mass of water is 100 / 40 / 10. After kneading, it is formed into a cylindrical material with a diameter of 1.8mm and a height of 5mm. The material is charged into a rotary carbonization furnace and heated to a temperature of 3~6℃ / min. 300 ℃, constant temperature for 30 minutes, nitrogen, then 3 ~ 6 ℃ / min to 850 ℃, constant temperature at this temperature for 60 minutes, then under the protect...

Embodiment 3

[0033] Example 3. Preparation of carbon molecular sieve

[0034] The collected phenolic resin waste (flesh scraps) is pulverized into granular materials less than 2 cm in a pulverizer, and dried in a constant temperature drying oven at 100°C for 1 hour. The dried materials are placed in a ball mill to grind them into powdered materials. The water content is 3.0%, and the particle size of the powdery material is controlled within 5~37μm. Put the powdery material, paper pulp waste liquid and water-soluble starch binder and water into the kneader for kneading, the powdery material / binder / water According to the mass part of 100 / 45 / 5, it is kneaded into a cylindrical material with a diameter of 1.8mm and a height of 5mm. The material is put into a rotary carbonization furnace and heated to 310 at a temperature rise rate of 8-10℃ / min ℃, constant temperature for 30 minutes, nitrogen gas, 8-10 ℃ / min to 700 ℃, constant temperature at this temperature for 90 minutes, then under the protect...

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PUM

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Abstract

The invention discloses a carbon molecular sieve for concentrating and extracting CH4 from coal bed gas and a preparation method thereof. The method comprises the following steps of: (1) mixing micro-powder phenolic resin waste, a bonder and water and performing extrusion forming to obtain a material strip; (2) carbonizing the material strip to obtain a carbonized material; and (3) adjusting the pores of the carbonized material by using a pore adjuster to obtain the carbon molecular sieve. The invention further provides a carbon molecular sieve prepared by the method. The carbon molecular sieve can be used for separating CH4 / N2 mixed gases. The preparation method which uses the phenolic resin industrial waste as a raw material has the advantages of environmental friendliness, wide source and low cost, and meanwhile is relatively simple in process and easier to industrialize and ensure the stable quality of products. The carbon molecular sieve product prepared by the invention has a remarkable CH4 / N2 separating performance, and absorbs N2 preferably. The product gas is directly enriched and recovered at the top of the tower, so that the operating cost of pressure swing adsorption can be lowered.

Description

Technical field [0001] The invention relates to a coalbed methane concentration and purification CH 4 Carbon molecular sieve and its preparation method are used. Background technique [0002] my country's coalbed methane resources mainly come from underground drainage systems, and its main component is CH 4 , N 2 And O 2 , According to different gas sources also contain a certain amount of CO 2 And one or more of impurity gases such as water vapor. After desulfurization, drying, deoxidation and other pretreatments, the mined coalbed methane is composed of CH 4 And N 2 Mainly, the main difficulty in purifying methane gas in coalbed methane lies in CH 4 And N 2 Separation. [0003] For the current CH 4 / N 2 The technologies developed and researched mainly include low-temperature cryogenic separation technology, membrane separation technology and pressure swing adsorption separation technology. Because of its simple equipment, flexible and convenient operation, low energy consumption...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/02B01J20/20B01D53/047C01B21/04C07C9/04C07C7/12C01B32/05
CPCY02C20/20
Inventor 张进华李兰廷王鹏董卫果梁大明李雪飞车永芳刘畅
Owner CCTEG CHINA COAL RES INST
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