An experimental study of methane pyrolysis through a layer of molten tin was carried out on a specially built test stand.
Employees of the Samara Polytech University, the specialists of the department for gas processing, hydrogen and special technologies and the research center “Fundamental Problems of Thermophysics and Mechanics” carried out theoretical and experimental studies on hydrodynamics, heat transfer and diffusion during methane pyrolysis (natural gas) melted in one layer Tin. The latest research results are published in the International Journal of Hydrogen Energy.
When methane is heated to high temperatures (over 1000 ° C), it decomposes (pyrolysis process) into hydrogen and carbon nanoparticles with unique physicochemical properties. Among the existing methane decomposition methods, heating during transition through a layer of molten metal in reactors is the most energy efficient. This method is environmentally friendly as it does not release carbon dioxide into the atmosphere.
“The reactors are vertical-cylindrical structures filled with molten metal and in the lower part of which there is a nozzle for supplying methane,” said Igor Kudinov, doctor of technical sciences, professor, director of the research center “Fundamental problems of thermophysics and.” Mechanics”. explained. “When designing a reactor, special attention must be paid to its height and volume so that methane warms up to the pyrolysis temperature and completely decomposes as it passes through a layer of molten metal. In this case, it is necessary.” Determine the concentration and speed of movement of methane, as well as the temperature and pressure of the methane mixture with tin over the entire height of the reactor. Therefore it is necessary to solve the problem of interconnected heat and mass transfer.
In addition, the employees of the department for gas processing, hydrogen and special technologies carried out an experimental study of methane pyrolysis through a layer of molten tin on a specially made test stand.
“During the experiment, a large amount of soot formed on the surface of the tin, which could not be removed from the reactor crucible along with the gas released from the plant,” said Andrey Pimenov, doctor of engineering, professor, head of the gas processing department , Hydrogen and special technologies. “We have developed a special device that controls the level of molten metal in the reactor and continuously removes solid carbon particles.”
Carbon dioxide-free hydrogen from natural gas Provided by Samara State Technical University
Quote: Scientists develop new eco-technologies for hydrogen production (2021, May 11th), available on May 11th, 2021 from https://techxplore.com/news/2021-05-scientists-eco-technologies-hydrogen-production.html were retrieved
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