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A novel carbon-based desulphurization catalyst and a preparation method thereof

A desulfurization catalyst, carbon-based technology, applied in the field of carbon-based desulfurization catalyst and its preparation, can solve the problems of active components loss of desulfurization ability, weak desulfurization ability, low sulfur capacity, etc., to solve the problem of sharp decline in desulfurization activity and improve life , The effect of reducing the corrosion resistance requirements

Inactive Publication Date: 2014-07-09
SICHUAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the current technical situation of carbon-based desulfurization catalysts in the prior art, the purpose of the present invention is to provide a novel carbon-based desulfurization catalyst that can be directly used in flue gas desulfurization and its preparation method, so as to overcome the existing problems of the carbon-based desulfurization catalysts in the prior art. The desulfurization ability is not strong, the sulfur capacity is not high, the desulfurization ability is reduced due to the regeneration and loss of active components, and it is difficult to directly apply to flue gas desulfurization with a discharge temperature of 135-180°C.

Method used

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  • A novel carbon-based desulphurization catalyst and a preparation method thereof
  • A novel carbon-based desulphurization catalyst and a preparation method thereof
  • A novel carbon-based desulphurization catalyst and a preparation method thereof

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Embodiment 1

[0024] Take 10g of cerium-zirconium solid solution powder with a molar ratio of 0.5 to cerium and zirconium elements, 220g of coal powder, and 113g of coal tar. First, put the cerium-zirconium solid solution powder and coal powder in a kneader and mix them at room temperature (about 30°C) for about 30 minutes. After fully mixing, add coal tar for kneading, extrude into a columnar material (diameter 6mm) under a pressure of 10MPa, then dry it at room temperature (about 30°C) for about 3 hours, and then dry it at about 105°C for about 12 hours. Cut the dried columnar material into 4-6mm long material sections, carbonize at about 500°C for about 1.5h, and then activate with water vapor as an activator at about 900°C for about 4h to obtain a desulfurization catalyst. The average compressive strength of the catalyst reaches 164Pa, and the concentration of sulfur dioxide is about 3500mg / m 3 , the temperature is about 150°C, the humidification temperature is about 60°C (the water vap...

Embodiment 2

[0026] Take 32.9g of cerium-zirconium solid solution powder with a molar ratio of cerium and zirconium elements of 1.0, 165g of coal powder, and 98g of coal tar. First, put the cerium-zirconium solid solution powder and coal powder in a kneader and mix them at room temperature (about 20°C) for about 40 minutes , after fully mixing, then add coal tar for kneading, extrude into a columnar material strip (6mm in diameter) under a pressure of 10MPa, then dry it at room temperature (about 20°C) for about 4 hours, and then dry it at about 90°C for 15 hours about. Cut the dried strips into 4-6mm long material sections, carbonize at about 400°C for about 2 hours, and then activate with water gas as an activator at about 800°C for about 6 hours to obtain a desulfurization catalyst. The average compressive strength of the catalyst reaches 156Pa, and the concentration of sulfur dioxide is about 7924mg / m 3 , the temperature is about 120°C, the humidification temperature is about 70°C (th...

Embodiment 3

[0028] Take 40g of cerium-zirconium solid solution powder with a molar ratio of cerium and zirconium elements of 1.5, 190g of coal powder, and 116.5g of coal tar, first place the cerium-zirconium solid solution powder and coal powder in a kneader, and mix them at room temperature (about 15°C) for about 40 minutes , after fully mixing, then add coal tar for kneading, extrude into a columnar material strip (6mm in diameter) under a pressure of 10MPa, then dry it at room temperature (about 15°C) for 8 hours, and then dry it at about 120°C for about 10 hours . Cut the dried strips into about 4-6mm long sections, carbonize at about 600°C for about 1 hour, and then activate the mixed gas of water vapor and carbon dioxide as an activator at about 1000°C for about 6 hours to obtain a desulfurization catalyst. The average compressive strength of the catalyst reaches 156Pa, and the concentration of sulfur dioxide is about 7150mg / m 3 , the temperature is about 80°C, the humidification t...

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Abstract

The invention discloses a novel carbon-based desulphurization catalyst and a preparation method thereof. The carbon-based desulphurization catalyst is prepared from following raw materials by weight: 1-30 parts of cerium-zirconium solid solution powder, 100 parts of coal powder and 40-60 parts of an adhesive. The cerium-zirconium solid solution comprises cerium, zirconium, and at least one selected from yttrium, lanthanum, iron, cobalt and nickel. The preparation method includes: adding the cerium-zirconium solid solution powder, the coal powder and the adhesive into a kneader, uniformly mixing, kneading, adding the mixture into an extrusion moulding machine and moulding, drying, charing at 400-600 DEG C, and activating at 800-1000 DEG C by utilization of at least one of water vapor, carbon dioxide and water gas as an activating agent to obtain the novel carbon-based desulphurization catalyst used for flue gas desulphurization. The novel carbon-based desulphurization catalyst has characteristics of high desulphurization capability, large sulfur capacity, no desulphurization capability reduction caused by active component loss, wide applicable flue gas temperature range, and the like.

Description

technical field [0001] The invention relates to the technical field of activated carbon-based catalysts, in particular to a carbon-based desulfurization catalyst using activated carbon as a carrier for flue gas desulfurization and a preparation method thereof. Background technique [0002] Commercial carbon-based desulfurization adsorbents generally have well-developed pore structures and various functional groups. 2 The active center for adsorption and catalytic oxidation is provided, and its preparation generally takes into account factors such as the difficulty of regeneration, mechanical strength, raw material source and selling price, and usually improves its adsorption capacity and sulfur capacity by improving its pore structure and surface chemical properties. . The preparation of the carbon-based desulfurization adsorbent in the prior art mainly has two methods at present, one is to load the active component metal ions on the activated carbon by impregnation, and th...

Claims

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Application Information

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IPC IPC(8): B01J23/10B01D53/86B01D53/50
Inventor 郭家秀尹华强陈耀强
Owner SICHUAN UNIV
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