High strength dried regenerative CO2 adsorbent taking coal gangue as carrier and preparation thereof

A coal gangue, high-strength technology, applied in the field of high-strength dry regeneration CO2 adsorbent and its preparation, can solve the problems of threatening the living environment of human beings, low comprehensive utilization rate, occupying a large amount of land, etc. Remarkable absorption and regeneration effect, good anti-wear effect

Inactive Publication Date: 2010-11-24
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The long-term storage of coal gangue not only occupies a large amount of land, but also spontaneously combusts under suitable conditions, emitting harmful gases such as sulfur dioxide, carbon oxides, and smoke, which seriously pollutes the environment and directly threatens the living environment of human beings.
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Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Components

[0026] a. Absorbent: potassium carbonate;

[0027] b. Carrier: the carrier base material is kaolinite mudstone coal gangue, the carrier auxiliary material is Guangxi white mud, and the weight ratio of base material to auxiliary material is 4:1;

[0028] c. Binder: industrial water glass;

[0029] Weight ratio: absorbent:carrier:binder=3:6:1.

[0030] 2. Preparation process

[0031] (1) Screening and removing impurities from the kaolinite mudstone, grinding and sieving with a ball mill to obtain particles with a particle size of 50-100 μm as a carrier base material, and then drying Guangxi white mud and grinding to obtain particles with a particle size of 50-100 μm The base material and the auxiliary material are mixed in a weight ratio of 4:1 and then entered into a ball mill for co-grinding into micropowder particles with a particle size of 5-50 μm;

[0032] (2) Add the ground micropowder particles, potassium carbonate and industrial water glass to ...

Embodiment 2

[0038] 1. Components

[0039] Absorbent: sodium carbonate;

[0040] Carrier: The carrier base material is kaolinite mudstone coal gangue, the carrier auxiliary material is Guangxi white mud (or bentonite), and the weight ratio of base material and auxiliary material is 7:1;

[0041] Binder: industrial water glass;

[0042] Weight ratio: absorbent:carrier:binder=4:5:1.

[0043] 2. Preparation process

[0044] (1) Screening and removing impurities from the old mudstone coal gangue, grinding and sieving with a ball mill to obtain particles with a particle size of 50-100 μm as a carrier base material, and then drying Guangxi white mud and grinding to obtain particles with a particle size of 50-100 μm The base material and the auxiliary material are mixed in a weight ratio of 7:1 and then entered into a ball mill for co-grinding into microparticles with a particle size of 5-50 μm;

[0045] (2) Add the ground micro-powder, sodium carbonate and industrial water glass into water t...

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Abstract

The invention discloses a high strength dried regenerative CO2 adsorbent taking a coal gangue as a carrier and preparation thereof, wherein the high strength dried regenerative CO2 adsorbent taking the coal gangue as the carrier comprises the components of an adsorbent, a carrier and a binder with the weight ratio of 2-6:4-8:1-2; and the preparation method comprises the following steps: (1) grinding and screening the coal gangues to be used as a carrier base material, grinding the dried clay to be used as a carrier auxiliary material, and mixing and grinding the base material with the auxiliary material; (2) adding the grinded micro powder particles, the adsorbent and the binder into water and adding antifoaming agent and dispensing agent at the same time to obtain slurry; and (3) preparing the slurry into spherulites with diameter of 50-100 mu m and carrying out calcination on the dried spherulites. The absorbent of the invention has the advantages of large specific surface area, good porosity, high intensity, resistant to wear, simple preparation method and low cost, reaches about 99% of adsorption and desorption effect to carbon dioxide, is suitable for industrialized production and can realize treatment of wastes with processes of wastes against one another.

Description

technical field [0001] The present invention belongs to CO 2 The field of dry absorbent and its preparation, in particular to a high-strength dry-type CO regeneration with coal gangue as a carrier 2 Adsorbents and their preparation. Background technique [0002] Climate change has become the number one issue for sustainable human development. As we all know, CO 2 It is one of the most emitted greenhouse gases. It is predicted that my country's CO 2 Total emissions will surpass the United States as CO by around 2020 2 This is bound to bring more serious negative impacts on climate and ecological environment to my country and the world. Therefore, effective measures must be taken as soon as possible to control CO 2 emissions and reduce the "greenhouse effect". Considering the CO in power plant flue gas 2 Due to the low partial pressure and the maturity of the technical process, the chemical absorption method has a great influence on the CO in the flue gas 2 removal is...

Claims

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Application Information

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IPC IPC(8): B01J20/12B01J20/30B01D53/62B09B3/00
CPCY02W30/20
Inventor 刁永发邰晓燕陈博赵海龙刘耀芳
Owner DONGHUA UNIV
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