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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received August 23, 2023
Accepted August 23, 2023

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Studies on solid mean residence time in a three-stage gas-solid fluidized bed with downcomer

Chitta Ranjan Mohanty^{1 2} Bhim Charan Meikap^{1 3†}

¹Department of Chemical Engineering, Indian Institute of Technology, Kharagpur 721301, India ²Department of Civil Engineering, Veer Surendra Sai University of Technology (VSSUT), Burla, Orissa, India ³School of Chemical Engineering, Faculty of Engineering, Howard College, University of Kwazulu-Natal, Durban 4041, South Africa

meikap@ukzn.ac.za

Korean Journal of Chemical Engineering, March 2011, 28(3), 969-973(5), 10.1007/s11814-010-0455-5

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Abstract

Fluidized bed reactors behave as a continuously stirred tank reactor having wide residence time of solids, which is not desirable if a homogeneous product is required. The multi-stage fluidized bed reactors narrow the solids residence time, making it useful for various operations. A three-stage fluidized reactor was designed, fabricated and operated under stable operating condition to investigate the mean particle residence time in the system. The materials taken for the study were lime and sand. In the particle residence time experiments, the results revealed that at a particular solids velocity, mean residence time decreased with increase in gas velocity and increased with decrease in gas velocity. Based on the data, a correlation has been presented for predicting mean residence time.

Keywords

Multi-stage Fluidization Perforated Plates Mean Residence Time Downcomer

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