Device for preparing hydrogen gas by decomposing water through synergic action of oxygen-permeable membrane and hydrogen-permeable membrane

Abstract

The invention provides a device for preparing hydrogen gas by decomposing water through synergic action of an oxygen-permeable membrane and a hydrogen-permeable membrane, which comprises a reaction chamber a vapor chamber, a hydrogen-permeable chamber and an oxygen-permeable chamber, wherein the reaction chamber is used for providing working temperature required for reaction; the vapor chamber is positioned in the reaction chamber and used for introducing water vapor; the hydrogen-permeable chamber and the oxygen-permeable chamber are positioned in the reaction chamber at both sides of the vapor chamber; the hydrogen-permeable chamber is separated from the vapor chamber by a casing made of a hydrogen-permeable membrane material; the oxygen-permeable chamber is separated from the vapor chamber by a casing made of an oxygen-permeable membrane material; a first chemical potential difference exists between the hydrogen-permeable chamber and the vapor chamber; a second chemical potential difference exists between the oxygen-permeable chamber and the vapor chamber; and oxygen gas / hydrogen gas produced by decomposition of the water vapor in the vapor chamber permeates through the corresponding casing under the action of the chemical potential difference and enters the corresponding chamber. According to the invention, under the synergetic action of the oxygen-permeable membrane and the hydrogen-permeable membrane, hydrogen permeation and oxygen permeation are mutually promoted, and the hydrogen production efficiency is greatly improved.

Description

technical field [0001] The invention relates to the technical field of new energy, in particular to an oxygen-permeable membrane and a hydrogen-permeable membrane to synergistically decompose water to produce hydrogen. Background technique [0002] With the intensification of traditional energy consumption, renewable energy has increasingly attracted the attention of all countries in the world. Hydrogen is a highly energy-dense energy source and can be produced by decomposing the extremely abundant water on the earth, so hydrogen as a renewable energy source has increasingly become a research hotspot. Compared with the traditional electrolysis of water for hydrogen production and chemical raw material catalytic hydrogen production, the use of nuclear energy, industrial waste heat or new energy such as solar energy as the energy source through the pyrolysis of water for the production of hydrogen through membrane materials can reduce the use of electric energy and fossil ener...

AI Technical Summary

Problems solved by technology

However, in this method, the hydrogen concentration in the oxygen-permeable membrane tube is too high, or the oxygen concentration in the hydrogen-permeable membrane is too high, both of which will inhibit the further decomposition of water, thereby reducing the conversion rate of water

Moreover, too high hydrogen concentration may cause damage to the structure of oxygen permeable membranes (especially perovskite oxygen permeable membranes), and too high oxygen concentration may cause oxidative damage to hydrogen permeable membranes.

These factors work together, resulting in limited water pyrolysis capacity, low hydrogen production efficiency, and low conversion efficiency of the system from thermal energy to chemical energy in the prior art devices for splitting water to produce hydrogen.

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