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Integrated absorbent and catalyzer for removing SO2and NOx and preparation method thereof

A catalyst and absorbent technology, which is applied in the field of integrated absorbent and catalyst for removing SO2 and NOx and its preparation, can solve the problem of a certain distance between commercialization and popularization, and achieve good application prospects, good regeneration performance, and simplification. The effect of desulfurization equipment

Inactive Publication Date: 2009-10-21
UNIVERSTAR SCI & TECH SHENZHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CuO / γ-Al is mainly used now 2 o 3 desulfurization and denitrification technology, but its commercial popularization and application still have a long way to go; how to combine CuO / γ-Al 2 o 3 Quantitative and accurate description of desulfurization and denitrification technology to solve the problems existing in the actual operation of this technology, so that it can be applied to production practice, is one of the issues currently facing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Preferred embodiment one, a SO removal 2 with NO x The preparation method of the integrated absorber and catalyst specifically comprises steps:

[0035] (1) Take 97.5 parts of Al 2 o 3 The powder is prepared with a BET surface area of ​​225m 2 / g, the BJH adsorption pore volume is 0.49ml / g, the bulk density is 0.73g / ml, and the particle size is about 20 mesh microspheres;

[0036] The BET surface area here refers to the sum of the total surface area of ​​all particles per gram of substance, which can be detected by a special instrument, and data processing is carried out according to the BET theory.

[0037] (2) Activate the above-mentioned microspheres and impregnate them in 2.5 parts of Cu(NO 3 ) 2 Keep in an equal volume of solution for 40 minutes;

[0038] (3) heating the above solution to 150°C and drying for 12 hours to obtain the dried crude catalyst;

[0039] (4) Calcining the dried crude catalyst at 500° C. for 5 hours, and cooling to obtain the desired...

Embodiment 2

[0040] Preferred embodiment two, a SO removal 2 with NO x The preparation method of the integrated absorber and catalyst specifically comprises steps:

[0041] (1) Take 85 parts of Al 2 o 3 The powder is prepared with a BET surface area of ​​295m 2 / g, the BJH adsorption pore volume is 0.64ml / g, the bulk density is 0.47g / ml, and the particle size is about 30 mesh microspheres;

[0042] (2) Activate the above microspheres and impregnate them in Cu(NO 3 ) 2 and 1 part of Zn(NO 3 ) 2 Keep in the mixed equal volume solution for 50 minutes;

[0043] (3) heating the above solution to 150°C and drying for 10 hours to obtain the dried crude catalyst;

[0044] (4) Calcining the dried crude catalyst at 600° C. for 7 hours, and cooling to obtain the desired desulfurizing agent.

Embodiment 3

[0045] Preferred embodiment three, a SO removal 2 with NO x The preparation method of the integrated absorber and catalyst specifically comprises steps:

[0046] (1) Take 78.5 parts of Al 2 o 3 The powder is prepared with a BET surface area of ​​205m 2 / g, the BJH adsorption pore volume is 0.54ml / g, the bulk density is 0.69g / ml, and the particle size is about 30 mesh microspheres;

[0047] (2) Activate the above microspheres and impregnate them in 20 parts of Cu(NO 3 ) 2 and 1.5 parts of Zn(NO 3 ) 2 Keep in the mixed equal volume solution for 60 minutes;

[0048] (3) heating the above solution to 130°C and drying for 11 hours to obtain the dried crude catalyst;

[0049] (4) Calcining the dried crude catalyst at 500° C. for 8 hours, and cooling to obtain the desired desulfurizing agent.

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Abstract

The invention discloses an integrated absorbent and catalyzer for removing SO2 and NOx and a preparation method thereof. In the preparation method, gamma-Al2O3 with strong absorbability and catalytic activity are mainly adopted as a desulfurizer carrier and CuO / gamma-Al2O3 absorbent / activator with different components is prepared by an equal volume dipping method. The desulfurizer has good effect of removing SO2 and NOx, thereby the defect that the performance of the desulfurizer on the current market is single is solved, and the SO2 and the NOx in smoke can be removed simultaneously. The invention has a significance for simplifying desulphurisation devices of electric power plants and reducing investment of the desulphurisation devices, and the catalyzer has good regeneration performance, low production cost, simple process and good application prospect.

Description

Technical field: [0001] The invention belongs to the technical field of coal combustion, and specifically relates to a technology for purifying toxic gases in coal combustion waste gas, and furthermore is a method for removing SO 2 with NO x An integrated absorbent and catalyst and a preparation method thereof. Background technique: [0002] In recent years, with the rapid development of industry, the problem of environmental pollution has become more and more prominent. For example, sulfur dioxide and nitrogen oxides in the combustion waste gas of petroleum and coal are discharged into the atmosphere, causing serious pollution of the atmospheric environment. According to statistics, the area covered by acid rain in my country has reached more than 40% at present, so the control of SO 2 Emissions and protection of the living environment are urgent issues in our country. [0003] Coal-fired boilers equipped with flue gas desulfurization devices are still the only way to re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/72B01J23/80B01D53/60B01D53/86
CPCY02A50/20
Inventor 吴迅海王韶锋郑君国刘现卓
Owner UNIVERSTAR SCI & TECH SHENZHEN