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Aluminosilicate adsorbent and preparation method and application

A technology of aluminosilicate and adsorbent, which is applied in the field of adsorption gas drying and purification, can solve the problems of low dehumidification efficiency and high regeneration temperature, and achieve the effect of enhancing dehumidification performance

Inactive Publication Date: 2015-07-01
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The primary purpose of the present invention is to overcome the shortcomings of existing molecular sieve adsorbent materials such as high regeneration temperature and low dehumidification efficiency in the low humidity range, especially when the relative humidity RH<15%, and provide a Preparation method of aluminosilicate adsorbent

Method used

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  • Aluminosilicate adsorbent and preparation method and application
  • Aluminosilicate adsorbent and preparation method and application
  • Aluminosilicate adsorbent and preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) First dissolve CTAB with deionized water to obtain CTAB aqueous solution.

[0039] (2) NaAlO 2 , NaOH and the TEAOH aqueous solution reagent with a concentration of 20wt% are mixed, and SiO is added 2 Stir the powder and keep it warm at 120°C for 4 hours to form a mixed solution.

[0040] (3) Add the CTAB aqueous solution obtained in step (1) to the mixture obtained in step (2), keep it warm at 120°C for 48 hours, then filter out the solid and wash it with deionized water, dry it at 80°C for 12 hours, at 0.5°C per minute The temperature was raised to 550° C. and calcined for 6 hours to obtain the aluminosilicate adsorbent.

[0041] (4) The aluminosilicate adsorbent is loaded on the ceramic rotating core to make a loaded aluminosilicate solid dehumidification rotary core.

[0042] Among them, the following ingredients are proportioned in molar ratio: SiO 2 : NaAlO 2 :NaOH:TEAOH:CTAB:H 2 O=1:0.18:0.15:0.30:0.15:55.9. Here H 2 The amount of O used refers to the...

Embodiment 2

[0044] (1) First dissolve CTAB with deionized water to obtain CTAB aqueous solution.

[0045] (2) NaAlO 2 , NaOH and the TEAOH aqueous solution reagent with a concentration of 20wt% are mixed, and SiO is added 2 Stir the powder and keep it warm at 120°C for 4 hours to form a mixed solution.

[0046] (3) Add the CTAB aqueous solution obtained in step (1) to the mixture obtained in step (2), keep it warm at 120°C for 48 hours, then filter out the solid and wash it with deionized water, dry it at 80°C for 12 hours, at 0.5°C per minute The temperature was raised to 550° C. and calcined for 6 hours to obtain the aluminosilicate adsorbent.

[0047] (4) The aluminosilicate adsorbent is loaded on the ceramic rotating core to make a loaded aluminosilicate solid dehumidification rotary core.

[0048] Among them, the following ingredients are proportioned in molar ratio: SiO 2 : NaAlO 2 :NaOH:TEAOH:CTAB:H 2 O=1:0.21:0.18:0.32:0.17:56.2.

Embodiment 3

[0050] (1) First dissolve CTAB with deionized water to obtain CTAB aqueous solution.

[0051] (2) NaAlO 2 , NaOH and the TEAOH aqueous solution reagent with a concentration of 20wt% are mixed, and SiO is added 2 Stir the powder and keep it warm at 110°C for 5 hours to form a mixed solution.

[0052] (3) Add the CTAB aqueous solution obtained in step (1) to the mixture obtained in step (2), keep it warm at 110°C for 50 hours, then filter out the solid and wash it with deionized water, dry it at 80°C for 12 hours, at a rate of 0.5°C per minute The temperature was raised to 550° C. and calcined for 6 hours to obtain the aluminosilicate adsorbent.

[0053] (4) The aluminosilicate adsorbent is loaded on the ceramic rotating core to make a loaded aluminosilicate solid dehumidification rotary core.

[0054] Among them, the following ingredients are proportioned in molar ratio: SiO 2 : NaAlO 2 :NaOH:TEAOH:CTAB:H 2 O=1:0.15:0.12:0.32:0.10:55.2.

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Abstract

The invention discloses an aluminosilicate adsorbent and a preparation method and an application. The aluminosilicate adsorbent provided by the invention is prepared by casting the following materials: SiO2, NaAlO2, NaOH, TEAOH, CTAB and water by molar ratio of 1:(0.047-0.21):(0.048-0.18):(0.24-0.32):(0.081-0.17):(42.6-56.2). The preparation method comprises the following steps: first, mixing SiO2, NaAlO2, NaOH and TEAOH aqueous liquors, insulating for 2-10 hours at 60-160 DEG C and adding a CTAB aqueous liquor; then, insulating for 38-60 hours at 80-140 DEG C; separating, washing, drying and roasting solids to obtain the aluminosilicate adsorbent. The adsorbent is surface-hydrophilic and has a special micro / mesoporous structure, so that the vapor adsorbing capacity of the absorbent under 10%RH reaches 82mg / g which is as twice as the adsorbing capacity of a type A molecular sieve; the vapor adsorbing capacity of the absorbent under 40%RH reaches 500mg / g which is greater than that of silica gel with same humidity. The absorbent can be completely desorbed and regenerated at 85-90 DEG C, so that the demand on equipment size and energy is reduced, and the energy and material are saved remarkably. The absorbent is suitable for manufacturing rotary adsorbers in the field of gas drying and purification.

Description

technical field [0001] The invention belongs to adsorption gas drying and purification technology, in particular to an aluminosilicate adsorbent and its preparation method and application. Background technique [0002] Adsorption gas drying and purification technology has become one of the sustainable development technologies due to its obvious advantages in low-grade energy utilization and environmental protection. In the adsorption gas drying and purification technology, the adsorbent is the key to determine the performance of the adsorption device. Its adsorption and desorption performance on the adsorbed water vapor determines the gas drying and purification efficiency. [0003] Adsorbers can be divided into fixed bed adsorbers and rotary adsorbers according to their types. The adsorbent materials used in fixed bed adsorbers are mainly porous media, such as silica gel, aluminum glue, molecular sieve, etc., but silica gel and aluminum glue have low crushing strength, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/16B01J20/30B01D53/26B01D53/02
Inventor 魏小兰丁静王维龙张丽杨建平李江陈洪银杨晓西
Owner SOUTH CHINA UNIV OF TECH
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