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Preparation method of highly-dispersed meso pore gamma-Al2O3 base alkali (soil) metal composite adsorbent

A technology of metal compounding and alkaline earth metals, applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as complex processes and achieve the effects of simple processes, high concentration of aluminum sources, and strong adsorption performance

Inactive Publication Date: 2012-09-12
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this method, the carrier is prepared first, and then the organic amine is loaded, and the process is relatively complicated.

Method used

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  • Preparation method of highly-dispersed meso pore gamma-Al2O3 base alkali (soil) metal composite adsorbent
  • Preparation method of highly-dispersed meso pore gamma-Al2O3 base alkali (soil) metal composite adsorbent
  • Preparation method of highly-dispersed meso pore gamma-Al2O3 base alkali (soil) metal composite adsorbent

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Example 1: Highly dispersed mesoporous γ-Al 2 o 3 Preparation of base (earth) metal composite adsorbent

[0034]First use acid to decompose the aluminum source, then mix the obtained sol with the Pluronic triblock copolymer solution, and add the alkali metal precursor salt or alkaline earth metal precursor salt according to the molar ratio of alkali (earth) metal and aluminum ≤ 12% , to obtain a mixture of sol-Pluronic triblock copolymer-alkali metal precursor salt or alkaline earth metal precursor salt. (earth) metal composite adsorbent;

[0035] Alternatively, after the mixture is fully stirred and uniformly mixed, it is prepared by hydrothermally assisted solvent evaporation-induced self-assembly, that is, after the mixture is treated under hydrothermal conditions, it is then prepared by solvent evaporation-induced drying, vacuum drying and calcination. The alkaline (earth) metal composite adsorbent.

[0036] In the process of using acid to decompose the aluminum...

Embodiment 2

[0044] Example 2: Preparation of Mg-functionalized mesoporous γ-Al with F127 as template 2 o 3 base composite adsorbent

[0045] Dissolve 3.0 g of F127 in 40 ml of 95% ethanol, stir well at room temperature for 2 h to obtain a colorless and transparent solution A; add 3.0 g of SB powder (a kind of high-purity thin aluminum water produced in Germany) to 40 ml of distilled water Stone) and 0.53 ml, 14.5 M mol / L nitric acid solution, stirred thoroughly for 1 h to obtain Sol B. Solution A and sol B were mixed at room temperature, and Mg(NO 3 ) 2 ·6H 2 O, after fully stirring for 4 h, the mixture was subjected to solvent evaporation induction drying at 60 °C for 48 h, vacuum drying at 80 °C for 24 h, and static calcination at 600 °C for 4 h to obtain Mg-functionalized mesoporous γ- al 2 o 3 matrix composite material with a specific surface area of ​​197.1 m 2 / g, the pore volume is 1.03 cm 3 / g, and the average pore diameter is 20.9 nm. CO at room temperature 2 The adsor...

Embodiment 3

[0046] Example 3: Preparation of Ca-functionalized mesoporous γ-Al with F127 as template 2 o 3 base composite adsorbent

[0047] Dissolve 3.0 g of F127 in 40 ml of 95% ethanol, stir well at room temperature for 2 h to obtain a colorless and transparent solution A; add 3.0 g of SB powder and 0.33 ml of 14.5 mol / L nitric acid solution to 40 ml of distilled water in sequence , fully stirred for 1 h to obtain Sol B. Solution A and sol B were mixed at room temperature, and Ca(NO 3 ) 2 4H 2 O, after fully stirring for 4 h, the mixture was subjected to solvent evaporation induction drying at 80 °C for 24 h, vacuum drying at 120 °C for 12 h, and static calcination at 400 °C for 4 h to obtain Ca-functionalized mesoporous γ- Al 2 o 3 matrix composite material with a specific surface area of ​​159.6 m 2 / g, the pore volume is 0.73 cm 3 / g, and the average pore diameter is 18.4 nm. CO at room temperature 2 The adsorption capacity is 0.73 mmol / g (see figure 1 middle curve S-2)....

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Abstract

The invention relates to a preparation method of a highly-dispersed meso pore gamma-Al2O3 base alkali (soil) metal composite adsorbent, specifically comprising the following steps of: dispergating an aluminium source by the use of acid, mixing the obtained sol with a Pluronic triblock copolymer solution, adding alkali (soil) metal precursor salt according to the mol ratio of alkali (soil) metal to aluminium being less than or equal to 12%, fully stirring and uniformly mixing; and carrying out solvent evaporation-induced drying, vacuum drying and calcining on the obtained mixture or carrying out solvent evaporation-induced drying, vacuum drying and calcining after treating the obtained mixture under the hydro-thermal condition, so as to prepare the alkali (soil) metal composite adsorbent. The invention has the following advantages: the technology is simple; the condition is mild; the method is easy to control; the raw materials are cheap; and the alkali (soil) metal component and a carrier component are introduced by an in-situ one-pot method. The prepared highly-dispersed meso pore gamma-Al2O3 base alkali (soil) metal composite adsorbent has a good adsorption capability of a greenhouse gas CO2.

Description

technical field [0001] The present invention relates to the technical field of preparation and application of chemical alumina, specifically a method for CO 2 Adsorbed Highly Dispersed Mesoporous γ-Al 2 o 3 A One-Pot Preparation Method for Basic (Earth) Metal Composite Adsorbents. Background technique [0002] In recent years, global warming caused by the "greenhouse effect" has become one of the most concerned environmental issues, and CO 2 The contribution rate to global warming accounts for about 2 / 3, and the U.S. Environmental Protection Agency has listed it as a pollutant that will cause harm to public health and social welfare in December 2009. In a sense, CO 2 The emission reduction, capture, storage and utilization of resources have become major scientific issues affecting the future world pattern. In the studied CO capture 2 Among the various methods, the porous solid adsorption method is easier to achieve CO 2 The adsorption-desorption cycle process has grea...

Claims

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Application Information

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IPC IPC(8): B01J20/08B01J20/30B01D53/04
CPCY02C20/40
Inventor 蔡卫权郭蕾余家国胡玉珍陈浩陈伟程蓓
Owner WUHAN UNIV OF TECH
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