Intensification of the ozone-water mass transfer in an oscillatory flow reactor with innovative design of periodic constrictions: Optimization and application in ozonation water treatment

2020 ◽  
Vol 389 ◽  
pp. 124412 ◽  
Author(s):  
Cátia A.L. Graça ◽  
Rita Bravo Lima ◽  
M. Fernando R. Pereira ◽  
Adrián M.T. Silva ◽  
António Ferreira
Keyword(s):  
Mass Transfer ◽  
Water Treatment ◽  
Oscillatory Flow ◽  
Water Mass ◽  
Flow Reactor ◽  
Innovative Design

scholarly journals Oscillatory flow reactors for synthetic chemistry applications

2020 ◽  
Vol 10 (3) ◽  
pp. 475-490 ◽  
Author(s):  
Pauline Bianchi ◽  
Jason D. Williams ◽  
C. Oliver Kappe
Keyword(s):  
Mass Transfer ◽  
Oscillatory Flow ◽  
Flow Reactor ◽  
Plug Flow ◽  
Operating Conditions ◽  
Solid Particles ◽  
Flow Reactors ◽  
Liquid Systems ◽  
Suspend Solid ◽  
Biphasic Systems

Abstract Oscillatory flow reactors (OFRs) superimpose an oscillatory flow to the net movement through a flow reactor. OFRs have been engineered to enable improved mixing, excellent heat- and mass transfer and good plug flow character under a broad range of operating conditions. Such features render these reactors appealing, since they are suitable for reactions that require long residence times, improved mass transfer (such as in biphasic liquid-liquid systems) or to homogeneously suspend solid particles. Various OFR configurations, offering specific features, have been developed over the past two decades, with significant progress still being made. This review outlines the principles and recent advances in OFR technology and overviews the synthetic applications of OFRs for liquid-liquid and solid-liquid biphasic systems.

Improving CO2 mass transfer in microalgal cultures using an oscillatory flow reactor with smooth periodic constrictions

2021 ◽  
Vol 9 (6) ◽  
pp. 106505
Author(s):  
Ana L. Gonçalves ◽  
Filipe Almeida ◽  
Fernando A. Rocha ◽  
António Ferreira
Keyword(s):  
Mass Transfer ◽  
Oscillatory Flow ◽  
Flow Reactor ◽  
Co2 Mass Transfer

scholarly journals Effect of solids on O 2 mass transfer in an oscillatory flow reactor provided with smooth periodic constrictions

2017 ◽  
Vol 170 ◽  
pp. 400-409 ◽  
Author(s):  
A. Ferreira ◽  
Patrick O. Adesite ◽  
J.A. Teixeira ◽  
F. Rocha
Keyword(s):  
Mass Transfer ◽  
Oscillatory Flow ◽  
Flow Reactor

scholarly journals Oscillatory three-phase flow reactor for studies of bi-phasic catalytic reactions

2015 ◽  
Vol 51 (43) ◽  
pp. 8916-8919 ◽  
Author(s):  
Milad Abolhasani ◽  
Nicholas C. Bruno ◽  
Klavs F. Jensen
Keyword(s):  
Mass Transfer ◽  
Oscillatory Flow ◽  
Flow Reactor ◽  
Catalytic Reactions ◽  
Phase Flow ◽  
Three Phase ◽  
Three Phase Flow ◽  
Multi Phase Flow ◽  
Multi Phase ◽  
Time Limitations

Oscillatory flow reactor strategy removes the mixing, mass transfer and residence time limitations associated with continuous multi-phase flow approaches for studies of bi-phasic C–C and C–N catalytic reactions.

Modeling of mass transfer in biofilms in oscillatory flow conditions using k-ɛ turbulence model

2003 ◽  
Vol 3 (1-2) ◽  
pp. 201-207
Author(s):  
H. Nagaoka ◽  
T. Nakano ◽  
D. Akimoto
Keyword(s):  
Numerical Simulation ◽  
Mass Transfer ◽  
Turbulence Model ◽  
Uptake Rate ◽  
Oscillatory Flow ◽  
Substrate Uptake ◽  
Flow Conditions ◽  
Mass Transfer Mechanism ◽  
Substrate Uptake Rate ◽  
Good Agreement

The objective of this research is to investigate mass transfer mechanism in biofilms under oscillatory flow conditions. Numerical simulation of turbulence near a biofilm was conducted using the low Reynold’s number k-ɛ turbulence model. Substrate transfer in biofilms under oscillatory flow conditions was assumed to be carried out by turbulent diffusion caused by fluid movement and substrate concentration profile in biofilm was calculated. An experiment was carried out to measure velocity profile near a biofilm under oscillatory flow conditions and the influence of the turbulence on substrate uptake rate by the biofilm was also measured. Measured turbulence was in good agreement with the calculated one and the influence of the turbulence on the substrate uptake rate was well explained by the simulation.

Mass Transfer in Tubular Ceramic Membranes for Polluted Water Treatment - Numerical Simulation

2018 ◽  
Vol 20 ◽  
pp. 16-33 ◽  
Author(s):  
J. Saraiva de Souza ◽  
S. José dos Santos Filho ◽  
Severino Rodrigues de Farias Neto ◽  
A.G. Barbosa de Lima ◽  
H.A. Luma Fernandes Magalhães
Keyword(s):  
Mass Transfer ◽  
Water Treatment ◽  
Produced Water ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Ceramic Membranes ◽  
Numerical Results ◽  
Polluted Water ◽  
Separation Processes ◽  
Water Separation

Innovative technologies are needed to attend the increasingly strict requirements for produced water treatment, since most of the separation processes are limited to particles larger than 10 μm. Separation processes using ceramic membranes are attracting great interest from academic and industrial community. Nevertheless, few studies, especially numerical, regarding the inorganic membrane’s application for the polluted water separation have been reported. In the present work, therefore, a study of fluid-flow dynamics for a laminar regime in porous tubes (tubular porous ceramic membrane) has been performed. The mass, momentum and mass transport conservation equations were solved with the aid of a structured mesh using ANSYS CFX commercial package. The velocity of local permeation was determined using the resistance in series model. The specific resistance of the polarized layer was obtained by Carman-Kozeny equation. The numerical results were evaluated and compared with the results available in the literature, where by a good agreement with each other was found. The numerical results, obtained by the proposed shell and tubular membrane separation module, indicate that there is facilitation of mass transfer and hence a reduction in the thickness of the polarized boundary layer occurs.

scholarly journals The functionalization of carbon nanotubes using a batch oscillatory flow reactor

2012 ◽  
Vol 84 ◽  
pp. 544-551 ◽  
Author(s):  
S. Melendi ◽  
S. Bonyadi ◽  
P. Castell ◽  
M.T. Martinez ◽  
M.R. Mackley
Keyword(s):  
Carbon Nanotubes ◽  
Oscillatory Flow ◽  
Flow Reactor ◽  
Functionalization Of Carbon Nanotubes
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