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Feeding biomass powders into circulating fluidized bed reactors using non-mechanical devices: a computational fluid dynamics (CFD) analysis

Grant number: 18/11031-8
Support type:Scholarships abroad - Research Internship - Doctorate (Direct)
Effective date (Start): January 15, 2019
Effective date (End): January 14, 2020
Field of knowledge:Engineering - Chemical Engineering - Industrial Operations and Equipment for Chemical Engineering
Principal researcher:Maria Do Carmo Ferreira
Grantee:Lucas Massaro Sousa
Supervisor abroad: Aibing Yu
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Research place: Monash University, Australia  
Associated to the scholarship:16/25946-2 - Study on the performance of non-mechanical valves as feeders devices of biomass powders in circulating fluidized beds reactors, BP.DD


Biomass residues are generated in huge amounts in processing and are often used as a feedstock in industrial-scale energy cogeneration processes. In spite of that, a common problem in the operation of thermoelectric reactors is to ensure a stable, efficient and low-cost feeding of the particulate materials into the reactor. The solids feeding can be particularly limiting when using biomass particles, as these powders have unusual characteristics in terms of size distribution, composition and shape when compared to the conventional materials. The operability of feeding devices is also affected by the feeder's configuration and geometry, resulting in a complex interaction of factors to be simultaneously evaluated. The influence of this whole set of variables on the flow has not been clearly assessed so far. The aims of this internship project are: to perform Computational Fluid Dynamics (CFD) simulations aimed at describing two-phase flow of biomass powders in Circulating Fluidized Bed (CFB) reactors using the spouted bed and L-valve feeding devices; to investigate the flow patterns in the valves, standpipe and riser; to analyze scale-up features of the feeding devices and to perform a model verification by comparing the simulations with experimental data, acquired in the Drying Center of the Federal University of São Carlos, Brazil (FAPESP grant 2016/25946-2). Specifically, the influence of the mean diameter, moisture content of spent coffee ground powders, as well as aeration velocities and riser diameter on feeders' operability will be verified. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SOUSA, L. MASSARO; SCHULZ, C. G.; CONDOTTA, R.; FERREIRA, M. C. On the design of conical hoppers for spent coffee grounds: Moisture content and particle-size effects. Journal of Food Engineering, v. 300, JUL 2021. Web of Science Citations: 0.
MASSARO SOUSA, L.; FERREIRA, M. C. On the performance of a spouted bed type device for feeding spent coffee grounds to a circulating fluidized bed reactor. CHEMICAL ENGINEERING RESEARCH & DESIGN, v. 160, p. 31-38, AUG 2020. Web of Science Citations: 0.
SOUSA, LUCAS MASSARO; FERREIRA, MARIA C.; HOU, QINFU F.; YU, AIBING B. Feeding spent coffee grounds into reactors: TFM simulation of a non-mechanical spouted bed type feeder. WASTE MANAGEMENT, v. 109, p. 161-170, MAY 15 2020. Web of Science Citations: 0.
SOUSA, L. MASSARO; FERREIRA, M. C. Analysis of the performance of an L-valve feeding spent coffee ground powders into a circulating fluidized bed. Powder Technology, v. 362, p. 759-769, FEB 15 2020. Web of Science Citations: 0.
MASSARO SOUSA, L.; FERREIRA, M. C.; HOU, Q. F.; YU, A. B. Feeding spent coffee ground powders with a non-mechanical L-valve: Experimental analysis and TFM simulation. Powder Technology, v. 360, p. 1055-1066, JAN 15 2020. Web of Science Citations: 2.

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