Focus on the Thermoadhesion Mechanism in the Formation of Fayalite-Type Ceramic Deposits in Particle Separators of Fluidized-Bed Reactors

This article analyzes the thermoadhesive mechanism that leads to the formation of fayalite buildup in particle separators within fluidized bed reactors. The research focuses on how factors such as temperature, pressure, and the energy released during collisions between particles influence the viscosity change and the plasticity of the system, particularly in the temperature range of 450°C to 750°C and pressures above 5 bars. It is proposed that these buildup forms when the impact energy heats the particles, decreasing their relative viscosity and favoring their plastic viscosity, which facilitates their adherence and buildup on the internal surfaces of the equipment. The use of mathematical models, based on a modification of McClean's creep theory, allows for the estimation of the conditions that generate this buildup, as well as their potential application in the design and control of similar ceramic processes.