Method and system for reducing energy consumption, electrolyzing water to produce hydrogen and symbiotically value-adding chemicals

Abstract

The invention discloses a system and a method for reducing energy consumption, electrolyzing water to produce hydrogen and symbiotically value-adding chemicals. The system comprises a cathode chamberand an anode chamber separated by an exchange membrane, an electrolyte solution is arranged in the cathode chamber and the anode chamber, a cathode and an anode are correspondingly arranged in the electrolyte solution in the cathode chamber and the anode chamber, the cathode and the anode are both conductive substrates loaded with nickel-cobalt double hydroxides, and the electrolyte solution comprises inorganic alkali liquor and methyl alcohol. According to the method, the important problem that energy consumption is too high in a traditional water electrolysis hydrogen production reaction iseffectively solved, a co-electrolysis strategy composed of a cathode-driven hydrogen evolution reaction and an anode-driven methanol oxidation reaction is creatively provided, and thus the low-energy-consumption hydrogen evolution efficiency is improved, and efficient value addition of basic chemical methanol is achieved with half the effort.

Description

technical field [0001] The invention relates to the field of electrochemical catalysis, in particular to a method and system for reducing energy consumption, electrolyzing water to produce hydrogen and co-producing value-added chemicals. Background technique [0002] As a renewable and clean energy, hydrogen energy has many outstanding advantages such as high specific energy and non-polluting combustion products. In recent years, water electrolysis, recognized as an important route for large-scale hydrogen production, has become a very promising research focus. Therefore, it is of great research significance to develop an efficient water electrolysis hydrogen production system. The traditional water electrolysis system consists of two reactions: hydrogen evolution at the cathode (HER) and oxygen evolution at the anode (OER). The input voltage of the full hydrolysis system is much higher than the standard thermodynamic potential required for its reaction, and the value of i...

AI Technical Summary

Problems solved by technology

However, the traditional conversion method in industry is relatively complicated, and there will be many side reactions in the reaction process, resulting in too many intermediate products, which directly increases the difficulty of purifying the reaction product and affects the utilization rate of chemicals.

In addition, traditional industrial methods usually require relatively harsh conditions such as high temperature and high pressure and rectification and cracking to achieve the reaction. This process consumes a lot of energy and is complicated, which greatly limits its further development and large-scale production. application

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