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Preparation method of coal-based granular activated carbon with molecular sieving effect and application thereof in pressure-transformation adsorption and separation concentrated gas

A technology of granular activated carbon and pressure swing adsorption, which is applied in separation methods, dispersed particle separation, chemical instruments and methods, etc., can solve problems such as inability to block pipes, etc., and achieve the effects of low pollution, low cost, and easy control of product quality.

Inactive Publication Date: 2010-02-24
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing high specific surface area activated carbon adsorbents used for methane / nitrogen equilibrium separation coefficient can reach tens of tens; but the existing activated carbon adsorbents are powdery, easy to block the pipeline, and cannot be applied to the PSA process

Method used

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  • Preparation method of coal-based granular activated carbon with molecular sieving effect and application thereof in pressure-transformation adsorption and separation concentrated gas
  • Preparation method of coal-based granular activated carbon with molecular sieving effect and application thereof in pressure-transformation adsorption and separation concentrated gas

Examples

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Effect test

Embodiment 1

[0021] Example 1 The preparation method of coal-based granular activated carbon of the present invention and its application in pressure swing adsorption concentration and drainage of methane in coalbed methane

[0022] (1) Preparation of coal-based granular activated carbon adsorbent: crush and sieve lignite to 200 mesh, weigh 200g of coal powder, coal tar binder and water and mix evenly, and shape it into a column with a bottom diameter of 4mm and a height of 5mm on a molding machine Granules were dried in an oven at 120°C for 2 hours; then the molded samples were placed in a heating furnace, under the protection of nitrogen, the nitrogen flow rate was 12ml / h, heated to 700°C at a heating rate of 10°C / min, and after constant temperature for 1h, the Continue heating to 800°C at a heating rate of 10°C / min, and activate with water vapor at a constant temperature for 4 hours; after the reaction of the material is completed, cool to room temperature and discharge, then wash with w...

Embodiment 2

[0025] Example 2 The preparation method of coal-based granular activated carbon of the present invention and its application in pressure swing adsorption to concentrate carbon dioxide in flue gas

[0026] (1) Preparation of coal-based granular activated carbon adsorbent: brown coal is crushed and sieved to 160 mesh, 200g of coal dust and coal tar binder are evenly mixed, and formed into columnar particles with a bottom diameter of 4mm and a height of 5mm on a molding machine, Dry in an oven at 90°C for 4 hours; then place the molded sample in a heating furnace under nitrogen protection with a nitrogen flow rate of 12ml / h and heat to 500°C at a heating rate of 10°C / min. / min heating rate continued to heat to 800°C, and water vapor was activated at constant temperature for 3 hours; after the reaction of the material was completed, it was cooled to room temperature and discharged, then washed with water and dried to obtain 62g of the product.

[0027] (2) For pressure swing adsor...

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Abstract

The invention relates to a preparation method of coal-based granular activated carbon with molecular sieving effect and an application thereof for concentrating strongly adsorptive components of methane, carbon dioxide, and the like in mixed gas with methane and carbon dioxide by a direct deflating step and an inverse vacuum pumping step. The preparation method of coal-based granular activated carbon comprises the following steps: (a) pulverizing coal; (b) adding adhesives of coal tar, and the like into coal powder, and evenly mixing by adding water; (c) molding cylindrical granules, and drying; (d) carbonizing the molded cylindrical granules under nitrogen protection; (e) activating the carbonized cylindrical granules by vapor under the nitrogen protection; and (f) cooling the carbonizedcylindrical granules at room temperature, cleaning by water, and drying after the carbonized cylindrical granules are discharged. The prepared coal-based granular activated carbon has low cost, low pollution, low density and high adsorption performance after being loaded and can be used for a pressure-transformation adsorption technology to effectively concentrate gas components with different adsorption abilities in the mixed gas in a direct deflating process.

Description

technical field [0001] The present invention relates to the preparation method of coal-based activated carbon as a kind of granular activated carbon with molecular sieve effect by water vapor activation method. The coal-based granular activated carbon can be used for pressure swing adsorption concentration separation of various mixed gases, especially can Concentrate strongly adsorbed gaseous products such as methane and carbon dioxide. Background technique [0002] The main components of extracted coalbed methane, oilfield gas and landfill gas are a mixture of methane, nitrogen and carbon dioxide; the flue gas contains carbon dioxide. Methane can be used as efficient and clean energy and chemical raw materials, carbon dioxide is an important C 1 resource. Extraction of coalbed methane, oilfield gas, and flue gas seriously pollutes the atmosphere and wastes useful resources. Recovering methane and carbon dioxide from these gases has important application significance. How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01D53/047
Inventor 辜敏姚伟静鲜学福
Owner CHONGQING UNIV
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