TY - JOUR
T1 - Mixing assessment by chemical probe
AU - Habchi, Charbel
AU - Lemenand, Thierry
AU - Valle, Dominique Della
AU - Khaled, Mahmoud
AU - Elmarakbi, Ahmed
AU - Peerhossaini, Hassan
PY - 2014/7/25
Y1 - 2014/7/25
N2 - Quantification of micro-mixing is a fundamental issue in industrial chemical processes. Local mixing that is not "fast enough" compared with the reaction kinetics reduces the selectivity of the reaction. Micro-mixing can be characterized by chemical probe methods based on observation of a local chemical reaction that results from the competition between turbulent mixing at micro-scales and the reaction kinetics. However, real-world experimental conditions rarely comply with the grounding assumptions of this method. Starting from physical considerations, the present study aims to establish some guidelines for obtaining quantitative information from the chemical probe and for improving the accuracy of the method by an adaptive protocol. For the first aspect, an analytical approach is proposed to define the validity domain based on analysis of the turbulent time scales. For the second purpose, a novel experimental procedure is suggested that entails targeting the concentrations of the chemical species that can provide the optimal conditions for a relevant use of the chemical probe.
AB - Quantification of micro-mixing is a fundamental issue in industrial chemical processes. Local mixing that is not "fast enough" compared with the reaction kinetics reduces the selectivity of the reaction. Micro-mixing can be characterized by chemical probe methods based on observation of a local chemical reaction that results from the competition between turbulent mixing at micro-scales and the reaction kinetics. However, real-world experimental conditions rarely comply with the grounding assumptions of this method. Starting from physical considerations, the present study aims to establish some guidelines for obtaining quantitative information from the chemical probe and for improving the accuracy of the method by an adaptive protocol. For the first aspect, an analytical approach is proposed to define the validity domain based on analysis of the turbulent time scales. For the second purpose, a novel experimental procedure is suggested that entails targeting the concentrations of the chemical species that can provide the optimal conditions for a relevant use of the chemical probe.
KW - Chemical probe method
KW - Iodide-iodate chemical system
KW - Micro-mixing
KW - Mixing measurement
KW - Turbulence energy dissipation rate
U2 - 10.1016/j.jiec.2013.07.026
DO - 10.1016/j.jiec.2013.07.026
M3 - Article
AN - SCOPUS:84900478873
VL - 20
SP - 1411
EP - 1420
JO - Journal of Industrial and Engineering Chemistry
JF - Journal of Industrial and Engineering Chemistry
SN - 1226-086X
IS - 4
ER -