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Integrally formed granular carbon adsorbent as well as preparation method and application thereof

A granular carbon and adsorbent technology, applied in the direction of adsorption purification/separation, chemical instruments and methods, gas fuel, etc., can solve the problems of specific surface area, adsorption performance and mechanical strength reduction of adsorbent materials, and achieve excellent working ability, high Economic value, effect of increasing selectivity

Active Publication Date: 2020-08-14
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The porous carbon adsorbents in the prior art require the use of binders in the granulation process in practical applications, which will lead to a significant reduction in the specific surface area, adsorption performance and mechanical strength of the adsorbent material

Method used

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  • Integrally formed granular carbon adsorbent as well as preparation method and application thereof
  • Integrally formed granular carbon adsorbent as well as preparation method and application thereof
  • Integrally formed granular carbon adsorbent as well as preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0038] A method for preparing an integrated granular carbon adsorbent includes the following steps:

[0039] (1) Preparation of pre-carbonized materials:

[0040] In a nitrogen atmosphere, put the camellia shell into the quartz ark and then transfer it into the tube furnace, continue to heat up to 550°C at a rate of 10°C / min and keep it for 1 hour to obtain the pre-carbonized material;

[0041] (2) Mixing of porogen and pre-carbonized material:

[0042] The pre-carbonized material prepared in step (1) is crushed to a particle size of 300 mesh, and then the pre-carbonized material, KOH and ZnCl 2 Add to deionized water and make KOH and ZnCl 2 Dissolve completely, stir for 8 hours, and then dry at 85°C for 6 hours to prepare a mixture;

[0043] Among them, KOH and ZnCl 2 The ratio of mass to carbonized material is 1:2:1;

[0044] (3) Preparation of granular carbon adsorbent:

[0045] In a nitrogen atmosphere, the mixture prepared in step (2) is heated to 750°C at a rate of 10°C / min in a tub...

Embodiment 2

[0047] The operation steps are the same as in Example 1, except that the KOH and ZnCl 2 The ratio of mass to carbonized material was replaced from 1:2:1 to 2:0:1 to prepare a granular carbon adsorbent (AC-2-0).

Embodiment 3

[0049] The operation steps are the same as in Example 1, except that the KOH and ZnCl 2 The mass ratio of carbonized material to carbonized material was changed from 1:2:1 to 2:1:1 to prepare particulate carbon adsorbent (AC-2-1).

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Abstract

The invention relates to the technical field of adsorbents, in particular to an integrally-formed granular carbon adsorbent as well as a preparation method and application thereof. The granular carbonadsorbent is prepared by taking camellia oleifera shells as a raw material, performing pre-carbonization, performing pore-forming under an optimized KOH and ZnCl2 mixing condition, and finally performing sintering. According to the granular carbon adsorbent prepared by the method, the use of a binder is avoided, the integrally-formed granular carbon material with high mechanical strength is prepared at low cost, efficient CH4 / N2 separation and methane enrichment are realized, the problem of energy shortage can be relieved, and economic benefits are created; and under the conditions of 298 K and 100 kPa, the CH4 absorption amount of the prepared granular carbon adsorbent is as high as 1.49 mmol / g, and the CH4 / N2 adsorption selectivity is as high as 5.88.

Description

Technical field [0001] The invention relates to the technical field of adsorbents, in particular to an integrated granular carbon adsorbent and a preparation method and application thereof. Background technique [0002] Coalbed methane refers to the hydrocarbon gas stored in coal seams with methane as the main component, mainly adsorbed on the surface of coal matrix particles, partly free in coal pores or dissolved in coal seam water. It is an associated mineral resource of coal and is unconventional Natural gas is a clean, high-quality energy and chemical raw material that has risen internationally in the past ten or twenty years. It is estimated that my country's coalbed methane resources with a depth of less than 2000m are about 36.81 trillion m 3 , Equivalent to 49 billion tons of standard coal, and low-concentration coal-bed methane accounts for more than 2 / 3 of the total amount of coal-bed methane extraction in my country. The methane concentration of this part of the coal-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/28B01J20/30C10L3/10C07C9/04C07C7/12
CPCB01J20/20B01J20/041B01J20/0244B01J20/0288B01J20/28016C10L3/105C07C7/12C07C9/04
Inventor 王珺张艳邓曙光
Owner NANCHANG UNIV
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