Air-based oxygen-making electrolyte membrane, oxygen-making method and prepared oxygen products

Abstract

The invention discloses an air-based oxygen-making electrolyte membrane. The electrolyte membrane comprises an electrolyte layer, and a cathode electrode used as an air side electrode layer and an anode electrode used as an oxygen side electrode layer positioned on two sides of the electrolyte layer; and the cathode electrode and the anode electrode have the same compositions. In addition, the invention further discloses an oxygen-making method of the electrolyte membrane and prepared oxygen products. The ionic conductivity of the electrolyte membrane is 100% in selectivity, the electrolyte membrane is dense, and pure oxygen can be obtained conveniently and efficiently; and in addition, the electrolyte membrane is simple in production of device assemblies, high in yield and low in energy consumption, so that breakthrough on the technical bottleneck of demands of most advanced industries on high-purity oxygen is made.

Description

technical field [0001] The invention relates to the field of solid-state ionics, in particular to an electrolyte membrane based on air oxygen production, an oxygen production method and an oxygen product produced therefrom. Background technique [0002] Oxygen is an important chemical product, which has important applications in the fields of steelmaking industry, medical and health care, aerospace, oxygen-enriched combustion, fuel cells, and chemical engineering. At present, most oxygen production enterprises in the world use the air liquefaction separation method. The principle is to use the difference in the boiling point of each component in the air to carry out fractionation. This method consumes a lot of electricity in the process of compressing the air, and the cost of oxygen production is very high. . The efficiency of the pressure swing adsorption separation method developed in recent years has been improved, but limited by the reaction principle, it can only obtai...

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Problems solved by technology

Vacuum pumps, booster pumps and preheating systems will consume a lot of energy, and since the partial pressure of oxygen in the air is only 0.21, the two sides of the oxygen permeable membrane need to withstand a pressure difference of more than 5 times to achieve effective oxygen separation.

This puts forward high requirements on the strength of the oxygen permeable membrane, but the strength of the oxygen permeable membrane is directly proportional to the thickness, and the oxygen permeability is inversely proportional to the thickness. Low, difficult to achieve industrialization

In addition, the electrolysis of water or water vapor to produce oxygen is also a theoretically feasible method, but the electrolysis process consumes a lot of energy, and the storage and transportation of hydrogen as one of the products is difficult, and its usage and use environment do not match oxygen, which restricts electrolysis. The development of water oxygen production

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