Date of Award


Degree Type


Degree Name

Master of Engineering Science


Mechanical and Materials Engineering


Franco Berruti

Second Advisor

Cedric Briens


Rapid gas-solid separation is a critical stage in many industrial applications, such as fluid k *-

lytic cracking (FCC), heavy oil upgrading, and biomass pyrolysis. In these applications, act gases must be separated quickly and efficiently from catalyst or heat-bearing particles to srminate cracking reactions. Several rapid separation devices have been proposed to achieve sse demands. However, most proposed designs were intended for FCC processes. Very few

gas-solid separators have been proposed specifically for biomass pyrolysis. A novel gas-solid separator for biomass pyrolysis in a downer reactor is investigated in this jesis. An experimental study is performed to identify important separator geometry and operating conditions. Computational fluid dynamics (CFD) is used to gain insight into the two- shase flow structure in the separator. The numerical results are coupled with an original ^experimental technique for measuring the particle-wall restitution coefficient to select

!appropriate materials for the separator’s internal surfaces



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