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An integrally formed granular carbon adsorbent and its preparation method and application

A granular carbon and adsorbent technology, applied in chemical instruments and methods, adsorption purification/separation, 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 and low cost Inexpensive, easy to prepare results

Active Publication Date: 2022-06-24
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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  • An integrally formed granular carbon adsorbent and its preparation method and application
  • An integrally formed granular carbon adsorbent and its preparation method and application
  • An integrally formed granular carbon adsorbent and its preparation method and application

Examples

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Effect test

Embodiment 1

[0038]A preparation method of an integrally formed granular carbon adsorbent, comprising the following steps:

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

[0040] In a nitrogen atmosphere, the Camellia oleifera shells were loaded into a quartz ark and then transferred to a tube furnace, and the temperature was continuously raised to 550°C at a rate of 10°C / min and kept for 1 h to obtain a pre-carbonized material;

[0041] (2) Mixing of pore-forming agent and pre-carbonized material:

[0042] The pre-carbonized material prepared in step (1) is pulverized 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 Completely dissolved, stirred for 8 hours, and dried at 85°C for 6 hours to prepare a mixture;

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

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

[0045] In a nitrogen atmosphere, the mixtur...

Embodiment 2

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

Embodiment 3

[0049] The operation steps are the same as those in Example 1, except that KOH and ZnCl are mixed with 2 And the mass ratio of carbonized material was replaced from 1:2:1 to 2:1:1 to prepare granular 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 and its preparation method and application. The granular carbon adsorbent uses camellia oleifera shell as raw material, and after pre-carbonization, optimized KOH and ZnCl 2 Holes are made under mixing conditions and finally sintered. The granular carbon adsorbent prepared by the present invention avoids the use of binders, realizes the low-cost preparation of integrated high-mechanical-strength granular carbon materials, and realizes high-efficiency CH 4 / N 2 Separation and methane enrichment can alleviate energy shortage and create economic benefits; and under the conditions of 298K and 100kPa, the CH of the prepared granular carbon adsorbent 4 Absorption up to 1.49mmol / g, CH 4 / N 2 The 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 the coal seam with methane as the main component, mainly adsorbed on the surface of the coal matrix particles, partly free in the coal pores or dissolved in the coal seam water. It is an associated mineral resource of coal and is an unconventional Natural gas is a clean, high-quality energy and chemical raw material that has risen internationally in the past decade or two. It is estimated that the amount of coalbed methane resources buried deeper than 2000m in my country is about 36.81 trillion m 3 , equivalent to 49 billion tons of standard coal, and low-concentration coalbed methane accounts for more than 2 / 3 of the total coalbed methane extraction in my country. The methane concentration of this part...

Claims

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Application Information

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Patent Type & Authority Patents(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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