Modelling and measurement of bubble formation and growth in electroflotation processes

M. D. Shahjahan K. A. Sarkar , Piotr M. Machniewski , Geoffrey M. Ewans

Abstract

Electroflotation is used in the water treatment industry for the recovery of suspended particles. In this study the bubble formation and release of hydrogen bubbles generated electrolytically from a platinum cathode was investigated. Previously, it was found that both the growth rate and detachment diameter increased with increasing wire diameter. Conversely, current density had little effect on the released bubble size. It was also found that the detached bubbles rapidly increased in volume as they rose through the liquid as a result decreasing hydrostatic pressure and high levels of dissolved hydrogen gas in the surrounding liquid. The experimental system was computationally modelled using a Lagrangian-Eulerian Discrete Particle approach. It was revealed that desorption of gaseous solutes from the electrolyte solution, other than hydrogen, may have a significant impact on the diameter variation of the formed bubbles. The simulation confirmed that liquid circulation (forced or induced by the rising bubble plume) influences hydrogen supersaturation (concentration) in the neighbourhood of the electrode and also size of the resulting bubbles.
Author M. D. Shahjahan K. A. Sarkar
M. D. Shahjahan K. A. Sarkar,,
-
, Piotr M. Machniewski (FCPE / DPKT)
Piotr M. Machniewski,,
- Department of Process Kinetics and Thermodynamics
, Geoffrey M. Ewans
Geoffrey M. Ewans,,
-
Journal seriesChemical and Process Engineering , [Inżynieria Chemiczna i Procesowa], ISSN 0208-6425
Issue year2013
Vol34
No3
Pages327-336
Publication size in sheets0.5
Conference14th European Conference on Mixing, 10-09-2012 - 13-09-2012, Warszawa, Polska
Keywords in Polishśrednica bańki, oderwanie, masa transferu, modelowanie, CFD
Keywords in Englishelectroflotation, bubble diameter, detachment, mass transfer, CFD modelling
ASJC Classification1500 General Chemical Engineering; 1600 General Chemistry
DOIDOI:10.2478/cpe-2013-0026
URL http://mixing14.eu/p/mixing14eu_70.pdf
Languageen angielski
File
Sarkar M.D. (i in.) - Modelling and measurement....pdf 584.66 KB
Score (nominal)15
Score sourcejournalList
ScoreMinisterial score = 15.0, 18-05-2020, ArticleFromJournalAndMatConfByConferenceseries
Ministerial score (2013-2016) = 15.0, 18-05-2020, ArticleFromJournalAndMatConfByConferenceseries
Publication indicators WoS Citations = 4; Scopus SNIP (Source Normalised Impact per Paper): 2013 = 0.622; WoS Impact Factor: 2013 = 0.467 (2) - 2013=0.408 (5)
Citation count*
Cite
Share Share

Get link to the record


* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.
Back
Confirmation
Are you sure?