Results 41 to 50 of about 626,739 (147)

Enhanced Photosynthetic Pigment Production Using a Scaled-Up Continuously Circulated Bioreactor

open access: yesMarine Drugs, 2023
Microalgae have gained attention as a promising source of chlorophylls and carotenoids in various industries. However, scaling up of conventional bubble columns presents challenges related to cell sedimentation and the presence of non-photosynthetic ...
Won-Kyu Lee   +9 more
doaj   +1 more source

Coherent structures and bubble-particle velocity in 2-D fluidized beds [PDF]

open access: yes, 2008
This work presents an experimental study to characterize ascending bubbles and granular velocity in the dense phase of a 2-D fluidized bed. Three different non-intrusive techniques based on images obtained with a high speed camera are developed, and ...
Soria Verdugo, Antonio   +8 more
core   +1 more source

Effect of Electrolyte Concentration on Bubble Size and Gas-Liquid Interfacial Area in Bubble Column

open access: yesTikrit Journal of Engineering Sciences, 2005
The optimum conditions of bubble column would be the ones that enhance mass transfer and this is accomplished by maximizing gas-liquid interfacial area. In the present work the effect of electrolyte concentration (aqueous solution of sodium chloride NaCl
Farah T. Jassem
doaj   +1 more source

Design and development of bubble-cap tray column for continuous transesterification plant in coconut-oil-based biodiesel production

open access: yesThe Indian Journal of Agricultural Sciences, 2016
A study was carried out on production of biodiesel from coconut oil using alkali catalyzed transesterification process by two different reactive distillation columns, viz. sieve tray and bubble-cap tray column.
P GNANASELVI, P SUBRAMANIAN
doaj   +1 more source

Homogeneous and re-circulatory gas–liquid flow in a bubble column: A numerical investigation using OpenFOAM

open access: yesSN Applied Sciences, 2021
Highlights Predictions of gas volume fraction distributions and vertical liquid velocity. Effect of bubble size on dominant frequency and hydrodynamics inside the column.
Saroj K. Panda
doaj   +1 more source

IMAGE PROCESSING TO DETERMINE MASS TRANSFER COEFFICIENT FOR GAS BUBBLE

open access: yesمجلة النهرين للعلوم الهندسية, 2008
This paper suggests a simple system to study the hydrodynamics in a bubble column reactor and measuring gas-liquid specific interfacial area a, individual mass transfer coefficient kL, gas holdupG, flow regime, bubble size distribution, coalescence of
Naseer A. Al-Habobia, Aalaa A. Turkib
doaj  

On the scale-up criteria for bubble columns

open access: yesPetroleum, 2019
It is generally admitted that experimental data obtained in “laboratory-scale” bubble columns are representative of “industrial-scale” reactors if the well-known three “Wilkinson et al.
Giorgio Besagni   +2 more
doaj   +1 more source

A mesoscale approach for population balance modeling of bubble size distribution in bubble column reactors

open access: yes, 2017
Prediction of bubble size distribution is of paramount importance for the study of bubble column reactors. Current kernel functions for coalescence or breakage in CFD-PBM simulation are usually derived from the isotropic turbulence theory and ...
Xiao, Qi, Yang, Ning
core   +1 more source

Estimation of Bubble Size and Gas Dispersion Property in Column Flotation

open access: yesSeparations
This study investigates bubble size measurements, bubble characteristics, and the relationship between key operating variables and gas dispersion properties in column flotation.
HyunSoo Kim, Chul-Hyun Park
doaj   +1 more source

Dynamics of bubble growth and detachment from rigid and flexible orifices [PDF]

open access: yes, 2003
The objective of this paper is to understand how and why the orifice nature (rigid or flexible) governs the bubble generation. The differences in orifice nature and properties have strong consequences on the bubbles generated.
Hebrard, Gilles   +2 more
core   +1 more source

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