Impact of Reaction Chamber Geometry on the Particle-Residence-Time in Flame Spray Process

Author(s)

Buss, Lizoel ^[1] ; Noriler, Dirceu ^[2] ; Fritsching, Udo ^{[1, 3]}

Affiliation

^[1] Leibniz Inst Mat Engn IWT, Chem & Proc Engn, Bremen - Germany

^[2] Univ Estadual Campinas, Sch Chem Engn, Campinas - Brazil

^[3] Univ Bremen, Particles & Proc Engn, Bremen - Germany

• Document type: Journal article
• Source: FLOW TURBULENCE AND COMBUSTION; v. 105, n. 4, SI, p. 1055-1086, NOV 2020.
• Web of Science Citations: 1

Abstract

Production of functional nanoparticles and nanoscaled powders is a key process in several recent industrial applications. In this work, the flame process in nanoparticle production in sprays is analyzed. Specific focus is on the flow behavior, the temperature distribution, and the residence-time of particles in the hot (reactive) regions in a flame spray reactor that are analyzed by numerical simulations using computational fluid dynamics techniques. The role of the co-flowing gas rate provided to the flame spray reactor and its effects on the spray behavior, flame morphology, and particle properties in an enclosed atmosphere is highlighted. The influence of different operational conditions on the reactor temperature and temperature-residence-time distribution of gas and particles is investigated. It is found that providing a reduced co-flowing gas rate to the flame spray reactor favors the recirculation of hot gas, and, consequently increases the residence-time of particles in the high-temperature regions. The numerical results of particle diameter and gas-phase temperature are compared to some existing experimental data. (AU)

• FAPESP's process: 17/04045-0 - Modeling and Simulation of Nanoparticle production by Flame Spray Pyrolysis Using CFD coupled to Multivariate Population Balance Equation
• Grantee: Dirceu Noriler
• Support Opportunities: Regular Research Grants