Preparation method and application of desulfurization catalyst

A desulfurization catalyst and pore-enlarging agent technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc., to achieve the effect of long desulfurization time, high strength and large specific surface area

Inactive Publication Date: 2018-09-04
孙燕霞
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no literature report on the direct preparation of desulfurization catalysts from coal gangue

Method used

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  • Preparation method and application of desulfurization catalyst
  • Preparation method and application of desulfurization catalyst
  • Preparation method and application of desulfurization catalyst

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preparation example Construction

[0036] The invention provides a method for preparing a desulfurization catalyst. The method uses coal gangue as a raw material, and undergoes calcination, steam activation, hole expansion, carbon skeleton structure, and active component loading to obtain a high-efficiency desulfurization catalyst. The specific method is as follows: The following steps are performed:

[0037] (1) Calcination

[0038] Crush and ball-mill the coal gangue until the particle size is below 10 mesh, then add sodium carbonate, mix evenly and place it in a tube furnace. 2 , CO 2 , O 2 Calcination in a mixed atmosphere, the calcination temperature is 700~1200℃, the calcination time is 20~30min, and the mass ratio of coal gangue to sodium carbonate is (3~4):1;

[0039] (2) Water vapor activation

[0040] Put the sample obtained in step (1) into the high-temperature reactor, raise the temperature of the reactor to 300~400°C, control the pressure of the reactor to 22.4MPa, then feed water to reach a su...

Embodiment 1

[0054] (1) Calcination

[0055] 40g of coal gangue was pulverized and ball-milled until the particle size was below 10 mesh, then 10g of sodium carbonate was added, mixed evenly, placed in a tube furnace, and heated in N 2 , CO 2 , O 2 Calcined under mixed atmosphere, where N 2 , CO 2 , O 2 The volume ratio is 1:2:8, the calcination temperature is 1200°C, and the calcination time is 20min;

[0056] (2) Water vapor activation

[0057] Add the sample obtained in step (1) into a high-temperature reactor, raise the temperature of the reactor to 400°C, control the pressure of the reactor to 22.4MPa, then feed water to reach a supercritical state, and react for 10 minutes;

[0058] (3) Reaming

[0059] Add the sample obtained in step (2) into lithium nitrate aqueous solution, then stir at 30°C for 1 hour, filter, and dry at 110°C;

[0060] (4) Carbon skeleton structure

[0061] Add the dried sample obtained in step (3) into an ultrasonic reactor, then add titanium ethoxide ...

Embodiment 2

[0065] (1) Calcination

[0066] 40g of coal gangue was pulverized and ball-milled until the particle size was below 10 mesh, then 12.3g of sodium carbonate was added, mixed evenly, placed in a tube furnace, and heated in N 2 , CO 2 , O 2 Calcined under mixed atmosphere, where N 2 , CO 2 , O 2 The volume ratio is 1:2:4, the calcination temperature is 700°C, and the calcination time is 20min;

[0067] (2) Water vapor activation

[0068] Add the sample obtained in step (1) into the high-temperature reactor, raise the temperature of the reactor to 300°C, control the pressure of the reactor to 22.4MPa, then feed water to reach a supercritical state, and react for 10 minutes;

[0069] (3) Reaming

[0070] Add the sample obtained in step (2) into lithium nitrate aqueous solution, then stir at 30°C for 1 hour, filter, and dry at 110°C;

[0071] (4) Carbon skeleton structure

[0072] Add the dried sample obtained in step (3) into an ultrasonic reactor, then add titanium ethoxi...

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Abstract

The invention provides a preparation method and application of a desulfurization catalyst, and belongs to the field of environmental protection. The catalyst takes coal gangue as a raw material, the coal gangue is subjected to calcining, steam activation, hole expanding and carbon skeleton structuring, and a porous C-Al2O3-SiO2 composite carrier is obtained; the active ingredients are loaded on the surface of the carrier. The catalyst is large in specific surface area and low in price, it is found through testing that the desulfurization efficiency is kept at 89.2% or above, and the time of duration exceeds 220 min; the catalyst can be widely applied to catalytic desulfurization of large flue gas emission enterprises such as steel enterprises, coal-fired power plants and the metallurgicalindustry; the catalyst preparation method provides a new way for comprehensive utilization of the coal gangue.

Description

technical field [0001] The invention relates to a preparation method and application of a desulfurization catalyst, belonging to the field of environmental protection. technical background [0002] In recent years, people's awareness of environmental protection has become stronger and stronger, and their requirements for air quality have also become higher and higher. Sulfur dioxide is one of the main pollutants in the air, and the most important source of sulfur dioxide is mainly produced by the combustion of sulfur-containing substances such as coal. Among them, after sulfur dioxide is discharged into the air, it pollutes the air and brings secondary pollution—— acid rain. Therefore, controlling the emission of sulfur dioxide has become the most urgent issue in the field of environmental protection. [0003] At present, there are two main methods of gas desulfurization in industry: dry desulfurization and wet desulfurization. Dry desulfurization mainly uses iron oxide o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J37/02B01D53/86B01D53/50
CPCB01D53/8609B01J23/10B01J35/002B01J37/0201
Inventor 孙燕霞刘春波侯伟伟王湛杰
Owner 孙燕霞
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