Experimental Study on the Solids Residence Time Distribution in Multiple Square-Based Spouted Beds

Filippo Marchelli, Massimo Curti, Mattia Tognin, Giorgio Rovero, Cristina Moliner, Elisabetta Arato and Barbara Bosio
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Filippo Marchelli: Faculty of Science and Technology, Free University of Bozen-Bolzano, 39100 Bozen-Bolzano, Italy
Massimo Curti: Department of Civil, Chemical and Environmental Engineering, University of Genova, 16126 Genova, Italy
Mattia Tognin: Department of Civil, Chemical and Environmental Engineering, University of Genova, 16126 Genova, Italy
Giorgio Rovero: Department of Civil, Chemical and Environmental Engineering, University of Genova, 16126 Genova, Italy
Cristina Moliner: Department of Civil, Chemical and Environmental Engineering, University of Genova, 16126 Genova, Italy
Elisabetta Arato: Department of Civil, Chemical and Environmental Engineering, University of Genova, 16126 Genova, Italy
Barbara Bosio: Department of Civil, Chemical and Environmental Engineering, University of Genova, 16126 Genova, Italy

Energies, 2020, vol. 13, issue 18, 1-13

Abstract: The present work aims at investigating the residence time distribution (RTD) of a multiple spouted bed reactor, which will be applied for the pyrolysis and gasification of residual biomass. The unit is composed of square-based spouted beds, placed in series and at descending heights, and communicating with each other through an opening in the lateral wall. The gas is fed evenly in parallel. The experimental analysis is based on tracer experiments in cold-flow units, assessing the influence of the number of units and the bed height. The tests proved the good mixing properties of the spouted beds, which create a stable fluidization regime and do not feature dead zones. Each spouted bed can generally be well assimilated to an ideal continuous stirred tank reactor (CSTR). The RTD of the device seems adequate for the application, and also seems to be well tuneable through the selection of the bed height and number of units. Given the good similarity with ideal reactor networks, these represent a valid tool to estimate the final behavior in terms of RTD.

Keywords: in-series reactors; tracer experiments; square-based spouted beds; scale-up; residence time distribution; fluidization; E ( t ) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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