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Fe2O3-loaded Al2O3/SiO2@TiO2 porous core-shell sphere adsorbent as well as preparation method and application thereof

A porous core and adsorbent technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of adsorbents such as limited desulfurization and denitrification functions, inability to meet practical applications, and increased specific surface area, so as to improve adsorption capacity, Effect of reducing resistance and improving adsorption performance

Active Publication Date: 2021-06-25
CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the desulfurization and denitrification functions of the above-mentioned adsorbents are limited, and the specific surface area of ​​the adsorbent and the adsorption sites of the core-shell structure have not increased to a large extent, which cannot meet the needs of practical applications.

Method used

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  • Fe2O3-loaded Al2O3/SiO2@TiO2 porous core-shell sphere adsorbent as well as preparation method and application thereof
  • Fe2O3-loaded Al2O3/SiO2@TiO2 porous core-shell sphere adsorbent as well as preparation method and application thereof

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preparation example Construction

[0033] see figure 1 As shown, the present invention provides a Fe 2 o 3 load Al 2 o 3 / SiO 2 @TiO 2 The preparation method of porous core-shell spherical adsorbent comprises the following steps:

[0034] S1, the activated carbon particles are ultrasonically cleaned in a slightly acidic solution at room temperature for 0.2 to 1 hour, and then dried at 80 to 120°C for 2 to 4 hours to obtain pretreated activated carbon particles; pretreated activated carbon particles, mesoporous active oxidation Aluminum nanoparticles and mesoporous silica nanoparticles are mixed evenly according to a predetermined ratio, and granulated to obtain dry spherical powder with uniform particle size;

[0035] S2, mixing absolute ethanol, tetrabutyl titanate and acetic acid according to a predetermined ratio to obtain a first solution, and dispersing the dry spherical powder into a mixed solution of absolute ethanol / water by ultrasonic to obtain a second solution;

[0036] S3, setting the tempera...

Embodiment 1

[0047] Embodiment 1 of the present invention provides a kind of Fe 2 o 3 load Al 2 o 3 / SiO 2 @TiO 2 The preparation method of porous core-shell spherical adsorbent comprises the following steps:

[0048] S1, the activated carbon particles were placed in a slightly acidic solution with a pH value of 6 and ultrasonically cleaned at room temperature for 0.5 h, then dried at 100°C for 3 h to obtain pretreated activated carbon particles; the pretreated activated carbon particles, mesoporous Activated alumina nanoparticles and mesoporous silica nanoparticles are mixed evenly at a mass ratio of 0.2:1:0.3, and dried spherical powder with uniform particle size is prepared through an integrated granulation dryer, and the diameter of the sphere is 0.5-2mm.

[0049] S2, mix 30mL of absolute ethanol, 10mL of tetrabutyl titanate and 5mL of acetic acid, adjust the pH value to 4 to obtain the first solution, and disperse the dried sphere powder into absolute ethanol / water (20mL: 2mL) by...

Embodiment 2

[0054] The difference from Example 1 is that the molar ratio of the dry sphere powder to the titanium in the tetrabutyl titanate (core / shell molar ratio) is 1.5:1.

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Abstract

The invention provides a Fe2O3-loaded Al2O3 / SiO2@TiO2 porous core-shell sphere adsorbent as well as a preparation method and application thereof. The preparation method comprises the steps: firstly, preparing mixed dry sphere powder of activated carbon, aluminum oxide and silicon oxide, then coating the surface of a sphere with titanium dioxide by adopting a sol-gel method, carrying out calcination treatment and pore-forming treatment to obtain a porous core-shell sphere, and then loading iron oxide on the surface of the porous core-shell sphere by adopting a dipping-calcination method to obtain the porous core-shell sphere adsorbent. According to the preparation method, the structural characteristics of a core-shell material and the competitive adsorption effect between atmospheric pollutants SO2 and NO are utilized, the two processes of activated carbon carbonization treatment and cetyltrimethylammonium bromide pore-forming treatment are combined, and an inner core of a porous structure and an outer shell of a porous structure are constructed on the core-shell sphere adsorbent; and the specific surface area of the core-shell sphere is obviously increased, and core-shell inner and outer double-layer adsorption sites with high specific surface area are constructed.

Description

technical field [0001] The invention relates to the technical field of adsorbent preparation, in particular to a Fe 2 o 3 load Al 2 o 3 / SiO 2 @TiO 2 Porous core-shell sphere adsorbent, preparation method and application. Background technique [0002] As people's awareness of environmental protection is increasing day by day, my country's air environment quality and air pollutant discharge and other related standards are also more stringent, so SO as the main air pollutant in my country 2 and NO x Treatment technology is still a hot issue in the field of environmental protection in my country. More than 90% of the emissions of sulfur dioxide and nitrogen oxides come from the combustion of fossil fuels, most of which come from the production and supply of electricity and heat. In the process of rapid social and economic development, the demand for electric energy is also increasing, and the emission of sulfur dioxide and nitrogen oxides is increasing, which has brough...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/08B01J20/06B01J20/28B01J20/30B01J20/32B01D53/02
CPCB01J20/103B01J20/08B01J20/06B01J20/28019B01J20/28061B01J20/3064B01J20/3078B01J20/32B01D53/02B01D2253/25B01D2257/302B01D2257/404
Inventor 汤丁丁王涛霍培书赵皇
Owner CHINA CONSTR THIRD BUREAU GREEN IND INVESTMENT CO LTD
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