Pressurizing electrolytic cell and intensified electrolysis method

Abstract

The invention provides a pressurizing electrolytic cell and an intensified electrolysis method. The pressurizing electrolytic cell comprises a reaction tank, an electrode placed in the reaction tank, an electrolysis separation film and a pressurizing device, wherein the electrode comprises a cathode and an anode; the electrolysis separation film is used for separating the cathode from the anode; and the pressurizing device comprises a gas supply device and / or a heating device. The pressurizing electrolytic cell can achieve pressurization under the normal temperature condition, and pressurization can intensify the medium transfer process of an electrode interface, especially the transfer process of a sulfur element in minerals and the intensified mineral purification process; the electric conduction capacity of an electrolyte is improved, and accordingly energy consumption of electrolytic hydrogen production is effectively reduced; and precipitation and transfer of active oxygen in electrolyte can be enhanced through oxygen pressurization, so that the anodic oxidation process of the electrolyte is improved, and then the cathode hydrogen evolution efficiency is improved. The pressurizing electrolytic cell is particularly suitable for electrolysis of a heterogeneous system, can achieve intensification of the cathode hydrogen production process and meanwhile increases the quantity and reaction rate of active oxygen of the anode.

Description

technical field [0001] The invention belongs to the technical field of electrolysis, and relates to a pressurized electrolysis cell and a method for strengthening electrolysis. Background technique [0002] At present, the methods for producing hydrogen in industry mainly include: electrolysis of water, water gas method, electrolysis of saturated salt water, natural gas synthesis, etc. Among them, electrolysis of water to prepare hydrogen is one of the most widely used methods with relatively mature production technology. Hydrogen production is currently a commercial technology for obtaining high-purity hydrogen, which is used in the field of fuel pressurized electrolyzers and aerospace. The energy consumption in the most ideal state of electrolytic hydrogen production should be 2.69kWh / Nm 3 , but the total energy consumption of current hydrogen production technology is 6.7-7.3kWh / Nm 3 , and even the comprehensive efficiency of water electrolysis hydrogen production techno...

AI Technical Summary

Problems solved by technology

The focus of research on pressurized electrolysis systems at home and abroad focuses on pressurized water electrolysis in alkaline systems to produce hydrogen. The electrolysis systems are mostly homogeneous. The electrolysis process in the pressurized system containing the electrolyte (liquid phase) and the mineral to be electrolyzed (solid phase) is different from the electrolysis system of the homogeneous system mentioned above. The existence of pressure can not only promote the hydrogen evolution process of the cathode, It can also have a huge impact on the oxidation process of the anode, such as increasing the production rate and amount of active oxygen at the anode to promote the purification process of minerals

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