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Composite gamma-alumina film and its application in desulfurizing low concentration fume

A composite membrane and fully mixed technology, applied in membrane technology, semi-permeable membrane separation, chemical instruments and methods, etc., can solve the problems of late start and achieve the effect of easy cleaning, simple process and small footprint

Inactive Publication Date: 2008-02-20
TIANJIN URBAN CONSTR COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(See "γ-Al Al 2 o 3 Research on Thermal Stability of Inorganic Membranes") With the rapid development of membrane preparation technology, research on porous alumina membranes for gas separation has been widely carried out in recent years, but due to a late start, it is still at the performance level of the laboratory
The results of experimental research on the use of aluminum oxide membranes for gas separation, porous aluminum oxide membranes have been applied to H 2 , He, N 2 The separation of SO has never been separated from low concentration flue gas 2 report

Method used

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  • Composite gamma-alumina film and its application in desulfurizing low concentration fume

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: K 2 O / γ-Al 2 o 3 Preparation of composite membrane

[0030] ① Preparation of Al(OH) 3 sol

[0031] Using AlCl 3 ·6H 2 O soluble inorganic salt is the starting material. Weigh 7.2429gAlCl 3 ·6H 2 O in a beaker, then pour 100ml of water solvent to dissolve, drip ammonia water during the stirring process, adjust the acidity and alkalinity of the solution to pH=8.5, and form a white precipitate, which is separated by a centrifuge at a speed of 3000r / min, and then The prepared precipitate was subjected to 48h precipitation treatment, and 1.17g of the precipitated precipitate was accurately weighed, and placed in 50ml of deionized water solvent, adjusted to pH=3 with acid, and ultrasonically dispersed for 20min to form a stable 0.3 mol / L Al(OH) 3 Sol.

[0032] ② Preparation of K 2 O / γ-Al 2 o 3 Composite film

[0033] Using KOH as the raw material, weigh 1.12 g of KOH particles, dissolve it in 100 ml of water solvent, and stir to obtain a uniform 0.2 ...

Embodiment 2

[0048] Example 2: K 2 O / B 2 o 3 / γ-Al 2 o 3 Preparation of composite membrane

[0049] ① Preparation of Al(OH) 3 sol

[0050] Using AlCl 3 ·6H 2 O soluble inorganic salt is the starting material. First, weigh 7.2429g AlCl 3 ·6H 2 O in a beaker, then pour 100ml of water solvent to dissolve, drip ammonia water during the stirring process, adjust the acidity and alkalinity of the solution to pH=8.5, and form a white precipitate, which is separated by a centrifuge at a speed of 3000r / min, and then The prepared precipitate was subjected to 48h precipitation treatment, and 0.5g of the precipitated precipitate was accurately weighed, and placed in 50ml of deionized water solvent, adjusted to pH=3 with acetic acid, and ultrasonically dispersed for 20min to form a stable 2mol / L Al(OH) 3 Sol.

[0051] ② Preparation of boron-containing composite sol

[0052] Use H 3 BO 3 For the raw material. Weigh 1.55g H 3 BO 3 And dissolved in 50ml of water solvent, stirring consta...

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Abstract

The present invention discloses composite gamma-alumina film and its application in desulfurizing fume, and the composite gamma-alumina film includes composite K2O / gamma-Al2O3 film and composite K2O / B2O3 / gamma-Al2O3 film. The composite film is prepared with materials including AlCl3.6H2O, KOH and H3BO3 and through the following steps: preparing Al(OH)3 sol; preparing K2O / gamma-Al2O3 film or boron containing composite sol; and preparing composite K2O / B2O3 / gamma-Al2O3 film. By means of conventional desulfurzing apparatus and method, low concentration SO2 mixture gas desulfurized with the composite gamma-alumina film is collected and titrated to calculate the absorption of the composite film on low concentration SO2 gas. The present invention applies composite gamma-alumina film in desulfurizing low concentration fume, and has the features of low cost, simple process, no secondary pollution, high efficiency, etc.

Description

technical field [0001] The present invention is about γ-Al 2 o 3 Composite membranes and their application to flue gas desulfurization, especially involving K 2 O / γ-Al 2 o 3 with K 2 O / B 2 o 3 / γ-Al 2 o 3 Composite membrane and its application to low concentration flue gas desulfurization. Background technique [0002] With the rapid development of modern industry and transportation, industry and population are highly concentrated, air pollution has become a big environmental and social problem. where SO 2 Gases are the gaseous pollutants with the largest quantity and wide influence among the current air pollutants. SO 2 The gas most prominently causes acid rain and damages the respiratory function of the human body. For low concentrations of SO 2 (content<3.5%, due to the large amount of flue gas, low concentration=requires a large desulfurization device, which not only has various technical difficulties in engineering and equipment, but also in the selecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/50B01D71/02
Inventor 范晓丹张襄楷
Owner TIANJIN URBAN CONSTR COLLEGE