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Method for preparing modified mesoporous alumina adsorbent for desulfurization and denitration

A mesoporous alumina, desulfurization and denitrification technology, applied in the field of adsorption, can solve the problems of removal that have not been reported, and achieve the effects of low cost, prolonged adsorption rate retention time, and simple operation

Inactive Publication Date: 2015-07-22
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, there are many Chinese patents related to simultaneous desulfurization and denitrification or simultaneous desulfurization, denitrification and mercury removal, but there is no report on the simultaneous removal of sulfur dioxide and nitrogen monoxide by adsorbents based on modified mesoporous alumina.

Method used

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  • Method for preparing modified mesoporous alumina adsorbent for desulfurization and denitration
  • Method for preparing modified mesoporous alumina adsorbent for desulfurization and denitration
  • Method for preparing modified mesoporous alumina adsorbent for desulfurization and denitration

Examples

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Embodiment 1

[0024] Example 1: The preparation method of the modified mesoporous alumina adsorbent for desulfurization and denitrification is as follows:

[0025] Dissolve 2g of P123 in 40ml of absolute ethanol, stir well to dissolve; add 2.8ml of concentrated nitric acid, 0.76g of aluminum isopropoxide, 0.16g of Cu(NO 3 ) 3 ·3H 2 O, fully stirred for 12h; the obtained solution was evaporated to dryness in an oven at 40°C; the obtained solid was roasted in a muffle furnace, raised to 600°C at a rate of 1°C / min and kept at a constant temperature for 6h; the obtained modified mesoporous oxidation The aluminum is sieved to 40-60 mesh; put 2g of sieved modified mesoporous alumina (40-60 mesh) in a beaker, add 4ml of 0.1M potassium hydroxide solution to the beaker, and ultrasonically impregnate for 0.5h; then place Dry in an oven at 100°C for 15h; put the dried sample in a tube furnace under nitrogen protection, and roast at 400°C for 6h; a modified mesoporous alumina adsorbent for desulfuriz...

Embodiment 2

[0027] Example 2: The preparation method of the modified mesoporous alumina adsorbent for desulfurization and denitrification is as follows:

[0028] Dissolve 2g of P123 in 80ml of absolute ethanol, stir well to dissolve; add 3ml of concentrated nitric acid, 1g of aluminum isopropoxide, 0.2g of Cu(NO 3 ) 3 ·3H 2 O, continue to stir for 14h; evaporate the obtained solution to dryness in a 50°C oven; place the obtained solid in a muffle furnace for roasting, and raise it to 700°C at a constant temperature of 5h at a rate of 2°C / min; Alumina is sieved to 40-60 mesh; put 2g of sieved modified mesoporous alumina (40-60 mesh) in a beaker, add 5ml 0.2M potassium carbonate solution into the beaker, and ultrasonically impregnate for 0.75h; then Dry in an oven at 110°C for 13 hours; put the dried sample in a tube furnace under nitrogen protection, and roast at 500°C for 5 hours; prepare a modified mesoporous alumina adsorbent for desulfurization and denitrification;

[0029] SO in th...

Embodiment 3

[0030] Example 3: The preparation method of the modified mesoporous alumina adsorbent for desulfurization and denitrification is as follows:

[0031] Dissolve 2g of P123 in 120ml of absolute ethanol, stir well to dissolve; add 3.2ml of concentrated hydrochloric acid, 1.18g of aluminum sec-butoxide, and 0.26g of copper chloride in sequence, and continue stirring for 15h; place the resulting solution in an oven at 60°C and evaporate to dryness ; The obtained solid was roasted in a muffle furnace, and the rate was raised to 800 degrees for 4 hours at a rate of 1.5 ° C / min; the obtained modified mesoporous alumina was sieved into 40-60 mesh; The mesoporous alumina (40-60 mesh) is placed in a beaker, and 6ml of 0.4M potassium chloride solution is added to the beaker, ultrasonically impregnated for 1h; then placed in an oven at 120°C for 12h; the dried sample is placed in a tube Under the protection of nitrogen in a type furnace, roast at 600°C for 4 hours; prepare a modified mes...

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Abstract

The invention discloses a method for preparing a modified mesoporous alumina adsorbent for desulfurization and denitration; mesoporous alumina is used as a carrier, and is loaded with alkali metal ions of K and Cu ions respectively as active components for modification, ultrasonic equal-quantity impregnation is adopted, and the modified mesoporous alumina adsorbent is prepared; the method is simple, and is easy to operate and low in cost; and the adsorbent prepared by the method has good adsorption effect.

Description

technical field [0001] The invention relates to a preparation method of a modified mesoporous alumina adsorbent used for desulfurization and denitrification, and belongs to the field of adsorption. Background technique [0002] Coal is the main energy source in my country, and the total emissions of sulfur oxides and nitrogen oxides produced by coal burning in my country are very large, which are the main sources of air pollutants. At present, SO alone is removed 2 There are many studies on gases such as , NO, etc., but the investment and operation costs of the separate removal are relatively high, and the area occupied is relatively large. Flue gas treatment methods are divided into wet method, semi-dry method and dry method, among which the dry method has the advantages of lower cost, simple operation, no wastewater treatment and secondary pollution. [0003] The preparation, formation mechanism, characterization methods and catalytic application of mesoporous and ultra-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/08B01J20/30B01D53/02
Inventor 李凯孙鑫宁平黄彬汤立红刘贵刘思健王驰
Owner KUNMING UNIV OF SCI & TECH
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