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Nano mesoporous oxygen carrier and preparation method thereof

A nano-mesoporous and oxygen-carrier technology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems such as difficulties, limitations, and variable surface properties of host lattices. Achieve high stability and simple preparation process

Inactive Publication Date: 2019-11-05
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At home and abroad, hydrogen production by redox chemical chain reforming is also combined with CO 2 There is no research report on the development of oxygen carrier strengthened by in-situ adsorption. The two-dimensional layered montmorillonite has a natural self-assembly structure. It has been studied from different angles at home and abroad for many years. The traditional montmorillonite loaded oxide Although the method shows the loading structure, chemical adsorption and catalytic performance, there is no breakthrough in preparation, performance and application due to the variability of the surface properties of the host lattice, the difficulty of introducing components into complex pore types, and the limitations of the host structure and guest scale. change

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Measure ethylene glycol, tetrabutyl titanate and nitric acid with a molar ratio of 10:5:8, the concentration of nitric acid is 1.0 mol / L, first add tetrabutyl titanate to ethylene glycol, stir well to form light yellow solution, then the light yellow solution is added dropwise in the described nitric acid, vigorously stirred to generate a transparent solution, after this the NaOH solution with a concentration of 0.51mol / L is used to adjust the pH value of the transparent solution to make it reach 2, and fully Stir to generate a new transparent solution for use.

[0034] Take the purified montmorillonite, fully infiltrate it with water, add hexadecyltrimethylammonium bromide, wherein the mole number of the montmorillonite is 10 times the mole number of tetrabutyl titanate, cetyl trimethylammonium bromide The mole number of trimethylammonium bromide is 10 times the mole number of montmorillonite. After fully stirring and reacting at 60°C for 24 hours, add dodecylamine who...

Embodiment 2

[0040] Measure ethylene glycol, tetrabutyl titanate and nitric acid with a molar ratio of 15:5:9, and the concentration of nitric acid is 1.0mol / L. First, add tetrabutyl titanate to ethylene glycol and stir fully to form light yellow solution, then the light yellow solution is added dropwise in the described nitric acid, vigorously stirred to generate a transparent solution, after this the NaOH solution with a concentration of 0.51mol / L is used to adjust the pH value of the transparent solution to make it reach 3, and fully Stir to generate a new transparent solution for use.

[0041] Take the purified montmorillonite, fully infiltrate it with water, add cetyltrimethylammonium bromide, wherein the molar number of the montmorillonite is 15 times that of tetrabutyl titanate, cetyl trimethylammonium bromide The mole number of trimethylammonium bromide is 10 times the mole number of montmorillonite. After fully stirring and reacting at 80°C for 24 hours, add dodecylamine whose mol...

Embodiment 3

[0047] Measure ethylene glycol, tetrabutyl titanate and nitric acid with a molar ratio of 10:3:10, the concentration of nitric acid is 1.0 mol / L, first add tetrabutyl titanate to ethylene glycol, stir well to form light yellow solution, then the light yellow solution is added dropwise in the described nitric acid, vigorously stirred to generate a transparent solution, after this the NaOH solution with a concentration of 0.51mol / L is used to adjust the pH value of the transparent solution to make it reach 2.5, and fully Stir to generate a new transparent solution for use.

[0048] Take the purified montmorillonite, fully infiltrate it with water, add hexadecyltrimethylammonium bromide, wherein the mole number of the montmorillonite is 10 times the mole number of tetrabutyl titanate, cetyl trimethylammonium bromide The number of moles of trimethylammonium bromide is 10 times the number of moles of montmorillonite. After fully stirring and reacting at 60°C for 12 hours, add dodec...

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Abstract

The invention discloses a nano-mesoporous oxygen carrier. The oxygen carrier comprises, by mass, 20-50 parts of montmorillonite, 5-10 parts of TiO2, 5-10 parts of NiO, 5-10 parts of CeO2 and 10-20 parts of CaO. The invention also discloses a preparation method of the oxygen carrier. Multibasic oxide is compounded based on the nanolayer structure of natural montmorillonite, so the oxygen carrier is nano-mesoporous, and cheap large-scale industrial application is reached. Methane and water vapor enter the mesoporous structure prosperous in the surface of the oxygen carrier, the methane, water and the oxygen carrier undergo a surface redox reforming hydrogen production reaction, CO2 is adsorbed in situ, the endothermic reaction and the exothermic reaction are coupled in the hydrogen production process, and highly pure hydrogen is prepared in a high-efficiency and energy-saving manner. The preparation method has the advantages of simplicity, controllability and very low cost. The nano-mesoporous oxygen carrier improves the catalysis performance and the thermal stability of the oxygen carrier, and is friendly to environment.

Description

technical field [0001] The invention relates to a nano mesoporous oxygen carrier and a method for preparing the nano mesoporous oxygen carrier by using multiple oxides and montmorillonite. Background technique [0002] Extensively studied steam reforming for hydrogen production and CO 2 In situ adsorption has a great correlation in thermodynamics, kinetics and chemical reactions. In recent years, the chemical chain technology using oxygen transfer carrier has been widely researched and applied to the coal combustion process. The chemical chain technology has confirmed that some oxide oxygen carriers have an exothermic effect on the partial oxidation combustion of carbon hydrocarbon raw materials. When syngas is produced, the chemical chain couples the ideas of partial oxidation and thermal decomposition. The system does not supply steam or heat. The product mainly contains H 2 , CO, H 2 O.CO 2 , when the system is supplied with water vapor, and the reduced state of the o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/12B01J20/28B01J20/30C01B3/40
CPCB01J20/06B01J20/12B01J20/28083B01J23/002B01J23/83B01J2523/00C01B3/40B01J2523/23B01J2523/31B01J2523/3712B01J2523/41B01J2523/47B01J2523/847
Inventor 豆斌林张华崔国民王子龙张冠华吴文广
Owner UNIV OF SHANGHAI FOR SCI & TECH
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