Method for preparing oxygen from chemical chain

A chemical chain and oxygen technology, applied in chemical instruments and methods, inorganic chemistry, oxygen preparation, etc., can solve the problems of low oxygen balance partial pressure of oxygen carrier, low utilization value of collected gas, low maximum oxygen concentration of collected gas, etc. To achieve the effect of improving the purity of oxygen

Inactive Publication Date: 2019-12-03
陶进峰
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this temperature range, the oxygen equilibrium partial pressure of the oxygen carrier is low, resulting in a low maximum oxygen concentration in the collected gas, and the value of the collected gas is not high.

Method used

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  • Method for preparing oxygen from chemical chain

Examples

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Effect test

Embodiment 1

[0031] A method for preparing oxygen by chemical chains, comprising heating up and releasing oxygen, cooling down, and absorbing oxygen, the specific steps are as follows:

[0032] A. Heating and oxygen release process:

[0033] 1) Initially or after the oxygen absorption process, the atmospheric pressure reactor A contains molten salt at 750-780 °C and the active ingredient of the oxygen carrier immersed in it, and the mass ratio of the active ingredient of the oxygen carrier to the molten salt is 2:8; the molten salt for molten CaCl 2 -NaCl, oxygen solubility S≤100mol / m 3 , CaCl 2 The mass ratio to NaCl is 15:1; the active ingredient of oxygen carrier is CUO / CU 2 O, initially powdered CUO with a particle size of 0.01-0.2mm; CaCl 2 -NaCl molten salt on oxygen carrier active components CUO, CU 2 The solubility of O is 0.5%~5%;

[0034] 2) The reactor A is purged with water vapor, and other gases in the reactor A are evacuated;

[0035] 3) Indirectly heat the molten sal...

Embodiment 2

[0044] The difference between this example and Example 1 lies in the heating method of the temperature rise and oxygen release process. In Example 1, the molten salt is indirectly heated. In this example, the molten salt is used as the heat carrier to heat the molten salt in reactor A. The specific steps are as follows : 1) Heat transfer process of the heat carrier: During the process of temperature rise and oxygen release, after the reactor A is purged with water vapor, the heat carrier at 900~1000°C is added to the reactor A, and the heat carrier is the molten salt composition in the reactor A For the same molten salt, the temperature of the 750~780°C molten salt in reactor A is raised to 840~900°C by stirring; 840~900°C heat carrier, the heat carrier is converted into a 900~1000°C heat carrier after being directly contacted with flue gas at 1000~1200°C, and the 900~1000°C heat carrier is used in the heat release process of the heat carrier.

Embodiment 3

[0046] The present embodiment differs from Example 1 in that: 1) the molten salt adopts molten Na 2 CO 3 -K 2 CO 3 -Na 2 SiO 3 or Na 2 CO 3 -K 2 CO 3 -K 2 SiO 3 ; 2) During the process of heating up and releasing oxygen, the inside of reactor A is negative pressure, the pressure is -2000Pa~-10Pa; 3) During the process of oxygen absorption, the inside of reactor A is under positive pressure, and the pressure is 10Pa~2000Pa.

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Abstract

The invention provides a method for preparing oxygen from a chemical chain. The method includes the following steps that solid oxygen carrier active components such as Mn2O3 / Mn3O4, BaO2 / BaO, Co3O4 / CoOand CUO / CU2O are immersed in a molten salt, the oxygen releasing process of the oxygen carrier active components is carried out in a molten salt environment, thereby promoting the decomposition of the oxygen carrier active components to generate the oxygen, and the purity of the oxygen in collected gas for direct preparation of the oxygen from the chemical chain is significantly improved.

Description

technical field [0001] The invention belongs to the technical field of oxygen preparation, in particular to a method for preparing oxygen by chemical chains. Background technique [0002] The basic principle of chemical chain preparation oxygen technology is to make the oxygen carrier undergo oxygen absorption and oxygen release reaction by controlling temperature, pressure and other conditions, so as to realize the purpose of separating oxygen from the air. Low technology. [0003] The oxygen carrier for chemical chain preparation of oxygen is usually composed of active ingredients and carriers. The active ingredients are substances that participate in the reaction to transfer oxygen. The active ingredients mainly include manganese, barium, strontium, cobalt, copper metal oxides and their composite oxides, and perovskites. Mineral-type composite oxide; the carrier is the substance used to carry the active ingredient, and the common carrier includes Al 2 o 3 , SiO 2 、TiO...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B13/02
CPCC01B13/0288C01B2210/0001
Inventor 陶进峰
Owner 陶进峰
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