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Blast furnace gas desulfurization catalyst as well as preparation method and application thereof

A desulfurization catalyst, blast furnace gas technology, applied in the direction of chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problem of mismatch between desulfurization agent temperature and hot gas temperature , to achieve resource utilization, high desulfurization precision, and reduce the effect of cooling process

Inactive Publication Date: 2020-12-11
SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The blast furnace gas desulfurization catalyst of the present invention is an activated carbon-loaded desulfurization catalyst developed to solve the technical problem that the temperature of the desulfurizer does not match the temperature of the hot gas in the existing blast furnace gas dry desulfurization system

Method used

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preparation example Construction

[0028] The invention provides a blast furnace gas desulfurization catalyst and its preparation method and application. The desulfurization catalyst is composed of activated carbon carrier, active component and cocatalyst, the carrier accounts for 85-95wt% of the total mass fraction, the active component accounts for 0.5-10wt% of the total mass fraction, and the cocatalyst accounts for 1-5wt% of the total mass fraction .

[0029] Among them, the active component is one or more combinations of zinc oxide, iron oxide, manganese oxide, copper oxide, and cerium oxide; the cocatalyst is one of alkali metal potassium salt, sodium salt, or alkaline earth metal calcium salt and magnesium salt One or several combinations; the activated carbon carrier is coal-based or biomass-based activated carbon, and the specific surface area is >600m 2 / g, pore volume>0.40cm 3 / g, iodine value>650mg / g. The activated carbon carrier can be shaped or unshaped coal-based activated carbon, or shaped or...

Embodiment 1

[0040] Prepare the desulfurization catalyst according to the method of the present invention: (1) Weigh 100g of columnar coal-based activated carbon with a diameter of 4×6-8mm, and use 300ml of 1.5wt% H 2 o 2 The solution was soaked for 4.5 hours, filtered, and dried at 100-120°C for 5 hours; the dried activated carbon was soaked in 300ml of 3wt% NaOH solution for 5 hours, filtered, washed until neutral, and dried at 100-120°C to obtain a modified activated carbon carrier; ( 2) Preparation of active component solution: Weigh 7g of zinc nitrate and 0.8g of ferric nitrate and dissolve them in 100ml of deionized water to prepare a mixed solution of zinc nitrate and ferric nitrate; (3) Impregnation load of active components: in the prepared In the modified activated carbon carrier, according to the ZnO loading of 3wt% and Fe 2 o 3 The loading capacity is 0.5wt%, add the prepared active component solution, impregnate for 12h, dry at 100-120°C for 5h, and roast at 500°C for 5h to ...

Embodiment 2

[0043] Prepare the desulfurization catalyst according to the method of the present invention: (1) Weigh 100g of amorphous granular coal-based activated carbon with a particle diameter of 3-8mm, and use 300ml of 2.5wt% H 2 o 2 The solution was soaked for 3 hours, filtered, and dried at 100-120°C for 4 hours; the dried activated carbon was soaked in 300ml of 5wt% NaOH solution for 5 hours, filtered, washed until neutral, and dried at 100-120°C to obtain a modified activated carbon carrier; (2 ) Preparation of active component solution: Weigh 4.1g of manganese nitrate and 2.4g of copper nitrate, dissolve them in 100ml of deionized water to prepare a mixed solution of manganese nitrate and copper nitrate; In activated carbon carrier, according to MnO 2 Loading amount of 2wt% and CuO loading amount of 1wt%, add the prepared active component solution, impregnate for 8h, dry at 100-120°C for 5h, and roast at 500°C for 5h to prepare activated carbon loaded with active component; (4) ...

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Abstract

The invention discloses a blast furnace gas desulfurization catalyst as well as a preparation method and application thereof. The desulfurization catalyst is composed of an activated carbon carrier, an active component and a cocatalyst; the active component is one or a combination of zinc oxide, iron oxide, manganese oxide and copper oxide; and the cocatalyst is an alkali metal or alkaline earth metal oxide. The preparation method comprises the following steps of: (1) carrying out functional group and surface acid-base modification treatment on the activated carbon carrier; (2) preparing an active component solution, loading an active component on the modified activated carbon carrier by adopting an impregnation method, and performing drying and roasting; and (3) preparing a cocatalyst component solution, loading a cocatalyst component on the modified activated carbon carrier by adopting an impregnation method, performing drying and roasting to obtain the desulfurization catalyst. Thecatalyst is used for removing sulfides in blast furnace gas; the concentration of the sulfides is reduced to 20 mg / Nm <3> or below, the saturated sulfur capacity is larger than 20%; high activity is still achieved after multiple times of regeneration, and the gas desulfurization cost can be greatly reduced.

Description

technical field [0001] The invention relates to a blast furnace gas desulfurization catalyst and its preparation method and application, especially suitable for blast furnace gas desulfurization and purification as the production process of industrial gas, and can also be used in the desulfurization and purification process of coal, biomass, and organic carbon-containing waste gasification coal gas , belonging to the field of energy conservation and environmental protection. Background technique [0002] Ironmaking blast furnaces produce a large amount of blast furnace gas during the production process. It is estimated that about 1400m of blast furnace gas can be produced for every ton of iron smelted. 3 ~1800m 3 . The main components of blast furnace gas are carbon dioxide (6-15%), carbon monoxide (28-35%), hydrogen (2-8%), nitrogen (55-60%), hydrocarbons (0.2-0.5%) and a small amount of sulfide (100-300PPm), heat value 3000-4000KJ / Nm3, furnace temperature 120-160℃. Bla...

Claims

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Application Information

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IPC IPC(8): B01J23/889B01J35/10C10K1/00
CPCB01J23/8892C10K1/004B01J35/617B01J35/635B01J35/633
Inventor 赵建涛黄戒介房倚天
Owner SHANXI INST OF COAL CHEM CHINESE ACAD OF SCI
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