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Absorption catalyst for desulfurization of smoke gas and preparation method thereof

A catalyst and flue gas technology, applied in the field of absorbing catalyst and its preparation, can solve the problems of secondary pollution, low cost and high construction cost, and achieve the effects of saving cost, reducing cost and increasing service life

Inactive Publication Date: 2008-05-21
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet method is easy to operate and has a high desulfurization rate, but it occupies a large area, and the investment is high, and it will cause secondary pollution; although the semi-dry method has a low investment cost, its desulfurization efficiency is relatively low; the plasma in the dry method The organic method can desulfurize and denitrify at the same time, but the construction cost is high, and there are also problems with X-ray radiation; the biological method of desulfurization has the characteristics of high efficiency, low cost, and less secondary pollution, but there are still many difficulties in finding suitable bacteria and microorganisms ; The electrochemical method is simple to operate, has a high desulfurization rate, and can avoid secondary pollution, but consumes a large amount of electric energy

Method used

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  • Absorption catalyst for desulfurization of smoke gas and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: the fineness is 80-100 mesh carrier γ-Al 2 o 3 , impregnated in Ce(NO 3 ) 3 In deionized aqueous solution, Ce(NO 3 ) 3 The dosage is CeO 2 Calculation, for γ-Al 2 o 3 3% of the mass, stirred for 5 hours, heated and stirred at 80°C for 1 hour, then dried in an oven at 110°C for 12 hours, and roasted in a muffle furnace at 500°C for 5 hours to obtain the intermediate CeO 2 / γ-Al 2 o 3 ; then impregnate the intermediate in Cu(NO 3 ) 2 In aqueous solution, Cu(NO 3 ) 2 The amount calculated as CuO as γ-Al 2 o 3 10% of the mass, stirred for 5 hours, heated and stirred at 100°C for 0.5 hours, then dried in an oven at 110°C for 12 hours, and baked in a muffle furnace at 500°C for 5 hours to obtain CuO-CeO 2 / γ-Al 2 o 3 Absorption catalyst for flue gas desulfurization.

[0026] Use the prepared absorption desulfurization catalyst to desulfurize the flue gas of the 410t / h boiler, and the flue gas outlet of the boiler is SO 2 The concentration is 1658...

Embodiment 2

[0027] Example 2: the fineness is 80-100 mesh carrier γ-Al 2 o 3 , impregnated in Ce(NO 3 ) 3 In deionized aqueous solution, Ce(NO 3 ) 3 The dosage is CeO 2 Calculation, for γ-Al 2 o 3 3% of the mass, stirred for 5 hours, heated and stirred at 80°C for 1 hour, then dried in an oven at 110°C for 12 hours, and roasted in a muffle furnace at 500°C for 5 hours to obtain the intermediate CeO 2 / γ-Al 2 o 3 ; then impregnate the intermediate in Cu(NO 3 ) 2 In aqueous solution, Cu(NO 3 ) 2 The amount calculated as CuO as γ-Al 2 o 3 10% of the mass, stirred for 5 hours, heated and stirred at 100°C for 0.5 hours, then dried in an oven at 110°C for 12 hours, and baked in a muffle furnace at 500°C for 5 hours to obtain CuO-CeO 2 / γ-Al2 o 3 Absorption catalyst for flue gas desulfurization.

[0028] Using a new type of absorption desulfurization catalyst for flue gas desulfurization of 220t / h boiler, boiler flue gas outlet SO 2 The concentration is 3550mg / m 3 , The flue g...

Embodiment 3

[0029] Example 3: the fineness is 80-100 mesh carrier γ-Al 2 o 3 , impregnated in Ce(NO 3 ) 3 In deionized aqueous solution, Ce(NO 3 ) 3 The dosage is CeO 2 Calculation, for γ-Al 2 o 3 3% of the mass, stirred for 5 hours, heated and stirred at 80°C for 1 hour, then dried in an oven at 110°C for 12 hours, and roasted in a muffle furnace at 500°C for 5 hours to obtain the intermediate CeO 2 / γ-Al 2 o 3 ; then impregnate the intermediate in Cu(NO 3 ) 2 In aqueous solution, Cu(NO 3 ) 2 The amount calculated as CuO as γ-Al 2 o 3 10% of the mass, stirred for 5 hours, heated and stirred at 100°C for 0.5 hours, then dried in an oven at 110°C for 12 hours, and baked in a muffle furnace at 500°C for 5 hours to obtain CuO-CeO 2 / γ-Al 2 o 3 Absorption catalyst for flue gas desulfurization,

[0030] Use a new type of absorption desulfurization catalyst to desulfurize the flue gas of a 130t / h boiler, and the flue gas outlet of the boiler is SO 2 The concentration is 5720m...

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Abstract

The invention relates to an absorption catalyst used in flue gas desulfurization and a preparation method thereof. Gamma- Al2O3 is adopted as a carrier, and cupric oxide and cerium oxide are loaded on the surface of the catalyst, wherein, weight of the cupric oxide is 2.5 to 15.0 percent of the mass of Gamma- Al2O3, and the weight of the cerium oxide is 2.5 to 15.0 percent of the mass of Gamma- Al2O3. Ce is added as catalyst accelerato to modify CuO / Gamma- Al2O3 catalyst, thus the service life of the absorption catalyst of the invention is prolonged. The absorption catalyst can be circularly used, thus desulfurization cost is lowered. After the absorption desulfurization process is conducted with the absorption catalyst, and concentrated SO2 is analyzed, then sulfur can be obtained after reduction; secondary pollution, waste water and waste liquid are not produced, thus the aim of environmentally protection is fully realized. Co which originally exists in fume is utilized by the absorption catalyst of the invention to reduce SO2, thus production cost is reduced, and the aim of changing waste into valuable is realized; the preparation method of the invention is an environmental friendly technology, therefore an efficient approach of flue gas desulfurization is opened up.

Description

technical field [0001] The invention relates to an absorption catalyst for flue gas desulfurization and a preparation method thereof. Background technique [0002] my country is a country where coal is the main energy source. In my country, 84% of coal is directly used for combustion. Coal usually contains sulfur, and the SO produced after sulfur combustion 2 . SO 2 Easily absorbed by wet mucous membrane surface to generate sulfurous acid and sulfuric acid. It has a strong stimulating effect on the eyes and respiratory mucosa. A large amount of inhalation can cause pulmonary edema, laryngeal edema, vocal cord spasm and suffocation. In mild poisoning, tearing, photophobia, coughing, pharynx, throat burning, etc. occur; severe poisoning can cause pulmonary edema within a few hours; inhalation of extremely high concentrations can cause reflex glottis spasm and suffocation. Inflammation or burns from skin or eye contact. Long-term low-concentration exposure can cause gen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/83B01J21/06B01D53/48
Inventor 王慧李卫清刘国杰周丽时森孙俭
Owner SHANGHAI UNIV
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