Selecting the best piping arrangement for scaling-up an annular channel reactor: An experimental and computational fluid dynamics study

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Francisca C. Moreira (Author) Other; Elvira Bocos (Author) Other; Ana G. F. Faria (Author) Other; Joana B. L. Pereira (Author) Other; Cláudio P. Fonte (Author) Other; Ricardo J. Santos (Author) FEUP; José Carlos B. Lopes (Author) FEUP; Madalena M. Dias (Author) FEUP; M. A. Sanromán (Author) Other; M. Pazos (Author) Other; Rui A. R. Boaventura (Author) Other; Vítor J. P. Vilar (Author) Other

Journal

Title: Science of the Total Environment

Vol. 667

Pages: 821-832

ISSN: 0048-9697

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 17 Citations

Scopus - 21 Citations

Associated Projects

LA LSRE-LCM - Financiamento Plurianual 2020-2023 para a Unidade LA LSRE-LCM Laboratório de Processos de Separação e Reacção - Laboratório de Catálise e Materiais

AIProcMat@N2020 - Advanced Industrial Processes and Materials for a Sustainable North Region of Portugal2020

Other information

Authenticus ID: P-00Q-CJS

DOI: 10.1016/j.scitotenv.2019.02.260

Abstract (EN): This study is focused on the selection of the best piping arrangement for a pilot scale annular channel reactor intended for the remediation of waters and wastewaters. Two annular channel reactors composed of a single UV lamp and distinct piping arrangements were considered: (i) a novel reactor with tangential inlet/outlet pipes the FluHelik reactor, and (ii) a conventional Jets reactor. These two reactors were manufactured at lab scale and characterized in terms of residence time distribution (RTD), radiant power and ability to degrade aqueous solutions spiked with a model compound - 3-amino-5-methylisoxazole (AMI) - by H2O2/UVC and UVC processes. Computational fluid dynamics (CFD) simulations were used to assess the hydrodynamics, RID and UV radiation intensity distribution of both reactors at pilot scale. In general, experimental results at lab scale revealed quite similar RTDs, radiant powers and AMI degradation rates for both reactors. On the other hand. CFD simulations at pilot scale revealed the generation of a helical motion of fluid around the UVC lamp in the FluHelik reactor, inducing: (i) a longer contact time between fluid particles and UV light, (ii) more intense dynamics of macromixing as a result of larger velocity gradients, turbulent intensities and dispersion of RID values around the peak, and (iii) a more homogeneous UV radiation distribution. In addition, the design of the FluHelik reactor can favor the implementation of various reactors in series, promoting its application at industrial scale. The FluHelik reactor was chosen for scaling-up. A pre-pilot scale treatment unit containing this reactor was constructed and its feasibility was proven.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12