Spinel-structured catalyst with capability of simultaneous desulfurization and denitrification as well as preparation method and application of catalyst

A spinel structure, desulfurization and denitration technology, which is applied in the field of simultaneous desulfurization and denitration catalysts with spinel structure and its preparation, can solve the problem of no transition metal active components and the like, and achieve the effects of low cost, wide source and easy acquisition.

Inactive Publication Date: 2018-08-03
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Activated carbon has the advantages of large specific surface area, good adsorption capacity, and rich oxygen-containing and nitrogen-containing functional groups. There are already patents on different methods of preparing activated carbon, but currently no transition metals are used as active components, and rare earth metals are used as additives. Activated carbon, and form a specific structure such as spinel, used in the patent report of simultaneous desulfurization and denitrification catalyst in flue gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach

[0020] The catalyst with spinel structure capable of desulfurization and denitrification simultaneously of the present invention, its preferred embodiment is:

[0021] Including: the active components are CoO, Fe 2 o 3 、Al 2 o 3 Two or three of them, the additive is CeO 2 , Y 2 o 3 One or two of them, the carrier is activated carbon;

[0022] The active components of the catalyst form a spinel structure on the surface of the carrier.

[0023] The active components are CoO, Fe 2 o 3 、Al 2 o 3 Two or three of them, the content of each component accounts for between 5% and 15% of the mass of the carrier;

[0024] The auxiliary agent is CeO 2 , Y 2 o 3 One or two of them, the content of each component accounts for 1-5% of the mass of the carrier.

[0025] The specific surface area of ​​the catalyst: 800 ~ 1500m 2 / g.

[0026] The above-mentioned preparation method of the catalyst with spinel structure capable of simultaneous desulfurization and denitrification of ...

Embodiment 1、10

[0050] Example 1, 10Fe 2 o 3 6CoO3Y 2 o 3 / AC

[0051] where Fe 2 o 3 Accounting for 10% of the mass of the carrier, CoO accounts for 6% of the mass of the carrier, Y 2 o 3 Accounting for 3% of the mass of the carrier, that is, the total load of active components and auxiliary agents is 19%.

[0052] First take 20-40 mesh AC500g in a beaker, and use a certain concentration and a certain proportion (mass ratio to AC) of HNO 3 Pretreat for 12 hours, then wash to neutral dryness, cool to room temperature and set aside.

[0053] Accurately weigh 2.5299gFe(NO 3 ) 3 9H 2 O, 1.0532g Co(NO 3 ) 2 ·6H 2 O, 0.3393g Y (NO 3 ) 3 ·6H 2 O, add 7ml of deionized water to dissolve to form a mixed solution; accurately weigh 5.0000g of pretreated AC, dip into the prepared mixed solution, soak at 40°C for 12h, and then dry in a 110°C drying oven 12h, and finally roasted at 500°C for 4h in a nitrogen-protected tubular roaster to obtain a catalyst sample.

[0054] The prepared cat...

Embodiment 2、10

[0056] Example 2, 10CoO15Al 2 o 3 2CeO 2 / AC

[0057] where Al 2 o 3 Accounting for 15% of the mass of the carrier, CoO accounts for 10% of the mass of the carrier, CeO 2 Accounting for 2% of the mass of the carrier, that is, the total loading of active components and auxiliary agents is 27%.

[0058] First take 20-40 mesh AC500g in a beaker, and use a certain concentration and a certain proportion (mass ratio to AC) of HNO 3 Pretreat for 12 hours, then wash to neutral dryness, cool to room temperature and set aside.

[0059] Accurately weigh 5.5166g Al(NO 3 ) 3 9H 2 Og, 2.5053Co(NO 3 ) 2 ·6H 2 O, 0.2523g Ce(NO 3 ) 2 ·6H 2 O, add 7ml of deionized water to dissolve to form a mixed solution; accurately weigh 5.0000g of pretreated AC, dip into the prepared mixed solution, soak at 40°C for 12h, and then dry in a 110°C drying oven 12h, and finally roasted at 500°C for 4h in a nitrogen-protected tubular roaster to obtain a catalyst sample.

[0060] The prepared cata...

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Abstract

The invention discloses a spinel-structured catalyst with the capability of simultaneous desulfurization and denitrification as well as a preparation method and an application of the catalyst. The catalyst is prepared from active components, auxiliaries and a support, wherein the active components comprise two or three of CoO, Fe2O3 and Al2O3; the auxiliaries comprise one or two or CeO2 and Y2O3;the support is activated carbon. The spinel structure is formed on the surface of the support by the active components of the catalyst. When the catalyst is used for simultaneous desulfurization and denitrification, CO is taken as a reducing agent, NO is reduced to N2 to be discharged into the air with a gas-solid catalytic reduction method, and SO2 is reduced to elementary S for recycling. Transition metal oxide and rare earth metal which are supported by the activated carbon are used as the auxiliaries, and the raw materials are widely sourced, easily obtained and low in cost; the activatedcarbon has the advantages of being large in specific surface area and good in adsorption capacity, containing rich oxygen-containing functional groups and the like; the measuring result of the specific surface area of the catalyst is 800-1500 m<2>/g.

Description

technical field [0001] The invention relates to a desulfurization and denitrification catalyst, in particular to a catalyst with a spinel structure capable of simultaneous desulfurization and denitrification, a preparation method and application thereof. Background technique [0002] At present, energy loss mainly depends on the combustion of coal, which leads to the SO 2 NO and NO have become the most important pollutants in air pollution, and their harm seriously affects the ecological environment and human health, reducing NO and SO 2 emissions is imperative. [0003] Compared with the combination of traditional SCR denitrification technology and FGD desulfurization technology to achieve the purpose of desulfurization and denitrification, desulfurization and denitrification have the advantages of saving floor space, reducing investment and operating costs, and have attracted widespread attention. [0004] The existing simultaneous desulfurization and denitrification cat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J35/10B01D53/86B01D53/60
CPCB01D53/8637B01J23/005B01J23/83B01J35/1023B01J35/1028Y02A50/20
Inventor 宋永吉程亮李翠清王虹王新承张伟
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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