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Preparation method of nano zinc oxide mesopore desulfurizer

A technology of nano-zinc oxide and nano-sized zinc oxide, which is applied in the direction of catalyst activation/preparation, chemical instruments and methods, separation methods, etc., and can solve the problem of hydrogen sulfide removal that has not been found yet

Inactive Publication Date: 2009-01-07
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In further searches, no reports have been found on the use of metal oxides on mesoporous materials for the removal of hydrogen sulfide in gases

Method used

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  • Preparation method of nano zinc oxide mesopore desulfurizer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In the 1M zinc nitrate solution, 2M sodium carbonate solution was added dropwise under stirring condition, and after the addition was completed, it was stirred for 4 hours. The reactants were dehydrated with a centrifuge. The filter cake is washed with 0.1M ammonia water, and the amount of ammonia water is about 200ml. After washing and filtering, continue to wash the resultant with absolute ethanol, then place it in a drying oven, dry it at 393K for 15h, and then roast it at 523K for 1.5h to obtain a white powder, which is Nanoscale zinc oxide particles.

[0025] Weigh 15g of nano-sized zinc oxide particles prepared by the above method, mix them with 100g of mesoporous material SBA-15 in an agate mortar, grind them thoroughly for 20 minutes, and put them in a microwave oven for 10 minutes. Finally, it is formed into a columnar mesoporous desulfurizer.

[0026] The desulfurizer prepared by the above method has a specific surface area of ​​106m 2 / g, and its total por...

Embodiment 2

[0028] Into the 3M zinc nitrate solution, under stirring condition, 2M sodium carbonate solution was added dropwise, and after the addition, stirred for 2 hours. The reactants were dehydrated with a centrifuge. The filter cake is washed with 0.1M ammonia water, and the amount of ammonia water is about 200ml. After washing and filtering, continue to wash the resultant with absolute ethanol, then place it in a drying oven, dry it at 393K for 15h, and then roast it at 523K for 1.5h to obtain a white powder, which is Nanoscale zinc oxide particles.

[0029] Weigh 1 g of nano-sized zinc oxide particles prepared by the above method, mix them with 100 g of mesoporous material SBA-15 in an agate mortar, grind them thoroughly for 20 min, and put them in a microwave oven for 10 min. Finally, it is formed into a columnar mesoporous desulfurizer.

[0030] The desulfurizer prepared by the above method has a specific surface area of ​​412m 2 / g, and its total pore volume can reach 0.91cm...

Embodiment 3

[0032] The preparation method of nano-zinc oxide particles is the same as Example 1.

[0033]Weigh 8 g of nano-sized zinc oxide particles prepared by the above method, mix them with 100 g of mesoporous material SBA-15 in an agate mortar, grind them thoroughly for 20 min, and put them in a microwave oven for 10 min. Finally, it is formed into a columnar mesoporous desulfurizer.

[0034] The desulfurizer prepared by the above method has a specific surface area of ​​336m 2 / g, and its total pore volume can reach 0.69cm 3 / g. When the outlet hydrogen sulfide concentration reaches 10ppm, the breakthrough sulfur capacity of the prepared nano zinc oxide mesoporous desulfurizer reaches 296mg / g mesoporous desulfurizer.

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Abstract

The invention relates to a preparation method for nano-zinc oxide mesoporous desulfurizer, which uses mesoporous material as desulfurizer carrier, uses nanoscale zinc oxide particles as desulfurization catalyst and carrys the nanoscale zinc oxide particles on the mesoporous material to obtain a mesoporous desulfurizer containing zinc oxide. The zinc oxide nanoparticles have good dispersion and are mainly deposited in mesopores and micropores based on the detection of physical representation and desulfurization performance of synthetic desulfurizer, and the desulfurizer shows excellent H2S removal capacity at room temperature. Additionally, the penetrating sulfur capacity of the mesoporous desulfurizer is also constantly increased along with the increase of the carried nanoscale zinc oxide content.

Description

technical field [0001] The invention relates to a method for preparing a desulfurizer in the technical field of chemical industry, in particular to a method for preparing a nanometer zinc oxide mesoporous desulfurizer. Background technique [0002] h 2 S is a highly harmful toxic gas. Regardless of safety, environment, or economic considerations, hydrogen sulfide must be removed. The removal methods of hydrogen sulfide usually include dry method and wet method. The wet desulfurization method has the advantages of low operating cost and large processing capacity, but the equipment investment is high and the process is complicated. Dry removal of hydrogen sulfide in coal gas has the advantages of high desulfurization precision, simple process, and convenient operation and maintenance, especially for the occasions with large gas volume and low concentration of hydrogen sulfide. [0003] Desulfurizers commonly used in the market include iron oxide desulfurizers, zinc oxide d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/52B01D53/86C10K1/34C10K1/20B01J23/06B01J37/02
Inventor 孙同华王晓慧杨骥贾金平
Owner SHANGHAI JIAO TONG UNIV
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