TY - JOUR
T1 - Performance evaluation of an electrochemical reactor used to reduce Cr(VI) from aqueous media applying CFD simulations
AU - Martinez-Delgadillo, Sergio
AU - Mollinedo-Ponce, Helvio
AU - Mendoza-Escamilla, Victor
AU - Gutiérrez-Torres, Claudia
AU - Jiménez-Bernal, José
AU - Barrera-Diaz, Carlos
PY - 2012/10
Y1 - 2012/10
N2 - Conventional processes used to remove hexavalent chromium (Cr(VI)) from industrial wastewaters produce large quantities of hazardous sludge that must be treated, handled and disposed of, increasing processes costs. The electrochemical treatment is an alternative method that efficiently removes (Cr(VI)) from industrial wastewaters. However, in electrochemical plug flow reactors with no liquid mixing or static electrodes, an iron salt film is formed on the surface of the electrodes (electrode passivation), which reduces diffusion and mass transfer that deteriorate the Cr (VI) removal efficiency and increases energy consumption. Therefore, the electrochemical reactors need to be designed to provide high mass transfer from the electrodes to the bulk liquid. Usually reactors characterization has been carried out as if they were a "black box." In this work, the performance of an electrochemical reactor with rotating ring electrodes was evaluated for different rotational speeds using experimental results and state-of-the-art computational fluid dynamics (CFD) tools. Hydrodynamic parameters were identified to determine their effect on the electrochemical process used to remove Cr(VI) from wastewater.
AB - Conventional processes used to remove hexavalent chromium (Cr(VI)) from industrial wastewaters produce large quantities of hazardous sludge that must be treated, handled and disposed of, increasing processes costs. The electrochemical treatment is an alternative method that efficiently removes (Cr(VI)) from industrial wastewaters. However, in electrochemical plug flow reactors with no liquid mixing or static electrodes, an iron salt film is formed on the surface of the electrodes (electrode passivation), which reduces diffusion and mass transfer that deteriorate the Cr (VI) removal efficiency and increases energy consumption. Therefore, the electrochemical reactors need to be designed to provide high mass transfer from the electrodes to the bulk liquid. Usually reactors characterization has been carried out as if they were a "black box." In this work, the performance of an electrochemical reactor with rotating ring electrodes was evaluated for different rotational speeds using experimental results and state-of-the-art computational fluid dynamics (CFD) tools. Hydrodynamic parameters were identified to determine their effect on the electrochemical process used to remove Cr(VI) from wastewater.
KW - Analysis
KW - CFD
KW - Electrochemical
KW - Hexavalent chromium
KW - Hydrodynamic
KW - Reactor
KW - Rotating electrodes
UR - http://www.scopus.com/inward/record.url?scp=84863982180&partnerID=8YFLogxK
U2 - 10.1016/j.jclepro.2011.10.036
DO - 10.1016/j.jclepro.2011.10.036
M3 - Artículo
SN - 0959-6526
VL - 34
SP - 120
EP - 124
JO - Journal of Cleaner Production
JF - Journal of Cleaner Production
ER -