Topic: Power Generation from Low-grade Fuels and Wastes Processing Using Filtration Combustion
Speaker: Eugene Salgansky, Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences
Time: Wednesday, October 30, 2024, 14:00-17:00
Venue: Main Building F805, Shahe Campus
Abstract:
The filtration combustion has been investigated to produce H2 and syngas from different solid fuels such as biomass, algae, polyethylene, and coal, and different gasifying agents such as water steam, air, and gaseous fuel-air mixtures. There are some crucial parameters to be considered to evaluate which is the best way to optimize the process: the temperature along the reactor, combustion wave velocities, and hydrogen and syngas yield. It is remarkable that H2 and CO production is totally related to the thermal behavior of the reactor and the type of gasifying agent used. According to the presented research results in the field of hydrogen production using filtration combustion, it can be concluded that when using a mixture of air with steam as an oxidizer, the maximum hydrogen content in gaseous products can be 25% by volume. It should be mentioned that the maximum H2 content in the products varies for different fuels. Catalysts and/or an oxygen-enriched oxidant can be used to increase the hydrogen content of the products.
For filtration regimes, when the front velocity is limited by the supply of an oxidizer to the combustion zone, gas-dynamic instability of a flat front is possible. According to the conclusions of the authors, instability during filtration combustion should occur when the hydrodynamic resistance of the initial solid backfill is higher than the resistance of the solid ash residue. The development of instability should lead to an alternative combustion mode in the form of the propagation of a separate channel or inclined front. To prevent the development of gas-dynamic instability during filtration combustion and the formation of a burnout channel, it is sufficient to introduce the factor of mixing of the solid phase. One of the possible solutions to this problem can be the implementation of the process in a rotating cylindrical reactor, with a certain angle of inclination, where a changing gravity enables mixing the solid material. Lateral feeding of powdered solid fuel mixed with the secondary oxidant stream and replacing the fixed bed by a moving one are also among the improvements explored in the reactor design and operation.
About the Speaker:
Dr. Eugene Salgansky is a leading researcher at the Combustion and Explosion Department of the Federal Research Center of Problems of Chemical Physics and Medicinal Chemistry of the Russian Academy of Sciences. He obtained his doctorate degree in 2013 at the FRC PCP MC RAS where he carried out research on filtration combustion. His research has focused on filtration combustion and pyrolysis (incl. using catalysts), thermodynamics, multiphase flow, energy recovery and heat transfer. He has published over 100 papers with more than 60 in peer-reviewed journals. He serves as members of the organizing committee at a number of International Conferences.
Research Institute of Aero-Engine
School of Energy and Power Engineering
