Electrolysis is a widely adopted and established method for hydrogen production. It involves the decomposition of water by supplying a specific form of energy, essentially reversing the process of hydrogen and oxygen combustion to form water.
The efficiency of electrolytic hydrogen production using electricity to decompose water ranges from 75% to 85%. While this method offers a straightforward and environmentally friendly process, it requires substantial electricity consumption. On average, producing one cubic meter of hydrogen consumes 4 to 5.5 kilowatt-hours of electricity, thus limiting its energy-saving potential.
Currently, electrolysis processes and equipment continue to be enhanced. Improvements include the use of advanced electrode materials in electrolysis reactors and the adoption of solid polymer ion exchange membranes as electrolytes, serving as both the anode and cathode membranes. Additionally, high-temperature and high-pressure conditions can facilitate the electrolysis reaction.
In our country, numerous hydrogen production plants, primarily employing small-scale electrolysis equipment, focus on utilizing hydrogen as a raw material rather than an energy source.
Research institutions such as Nankai University and Capital Normal University have been studying electrode processes and materials in electrolysis reactions. As hydrogen energy applications expand, hydrogen production through electrolysis will further develop.
An alternative method for hydrogen production utilizes water as a raw material in a thermochemical cycle, avoiding the high temperatures required for direct thermal water decomposition and reducing power consumption.
This approach involves introducing an intermediate substance into the water reaction system, progressing through multiple stages of reactions, and ultimately decomposing water into hydrogen and oxygen. The intermediate substance remains unchanged, and each reaction stage occurs at a low temperature.
Over the years, more than 20 thermochemical cycling methods have been developed worldwide, with some entering the pilot testing phase. Given the abundant water resources in our country, hydrogen production through water electrolysis powered by hydroelectric generation holds promising development prospects.
Contact：
If you have any questions, please feel free to contact us. Working hours: 8:30 a.m. to 17:30 p.m.
E-mail: zhangjixia@bjygti.com
