PICTURE: An experimental study of methane pyrolysis through a layer of molten tin was conducted under a specially made experimental stand More
Photo credit: @SamaraPolytech
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”, 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 together with the gas released from the plant,” Andrey Pimenov, Doctor of Technical Sciences, Professor, Head of the Gas Processing Department, Hydrogen and special technologies noted. “We have developed a special device that controls the level of molten metal in the reactor and continuously removes solid carbon particles.”
The research work was carried out within the framework of the grant “Development of scientific principles of technology and construction of hydrogen generation plants for the production of a methane-hydrogen mixture and the need for hydrogen energy” No. 05.607.21.0311 from December 2nd. 2019 (unambiguous agreement identifier RFMEFI60719X0311) of the federal target program “Research and development in priority areas of the scientific and technical complex of Russia for 2014-2020”.
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For reference: Samara Polytech as a flagship university offers a wide range of educational and research programs and aims at the development and transfer of high quality and practically oriented knowledge. The university has a reputation for technical developments and focuses on high quality education, scientific and pragmatic research, combining theory and practice in the leading regional companies and establishments. The training takes place in 30 integrated groups of subject areas and training areas (approx. 200 courses including Bachelor, Master and 55 PhD courses) such as oil and gas, chemistry and petrochemistry, mechanics and energy, transport, food production, defense, IT, mechanical engineering and automotive engineering, technical systems management and automation, materials science and metallurgy, biotechnology, industrial ecology, architecture, civil engineering and design, etc.
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