INTERFACIAL ACTIVITY IN THE TWO PHASE SYSTEMS UO2(NO3)2/Pu(NO3)4/HNO3 - H2O - TBP/OK

Extended classification of the buoyancy-driven flows induced by a neutralization reaction in miscible fluids. Part 1. Experimental study

“…Although the chemo-hydrodynamic pattern formation in a system of two reacting fluids was experimentally observed as early as 1888 (Quincke 1888), these studies were mainly descriptive by nature due to the complexity of these processes. However, a really consistent detailed study of the reaction-diffusion processes coupled with hydrodynamic phenomena started only a century later, since it was stimulated by many important technological applications including oil refining (Dupeyrat & Nakache 1978), photochemical polymerization (Evans & Uri 1949;Belk et al 2003), combustion processes (Zeldovich & Kompaneets 1960), separation of uranium ore (Thomson, Batey & Watson 1984), chemical reactor design and technology (Levich, Brodskii & Pismen 1967;Jakobsen 2008), external control of continuous-flow microreactors (Jensen 2001;Bratsun et al 2018;Bratsun & Siraev 2020), chemisorption (Lambert 1997;Karlov et al 2007), etc. Starting with the monograph (Levich 1962), the interaction between reaction-diffusion phenomena and hydrodynamic instabilities has attracted increasing interest because chemically induced changes of fluid properties, such as concentration, density, viscosity and surface tension, may result in the instabilities, which exhibit a large variety of convective patterns.…”

Effect of the Major Parameters on Pu Accumulation Predicted Using Several Numerical Codes for PUREX Solvent Extraction Process

“…The mass transfer rate, however, is not easy to formulate, since a variety of complex factors affect the transfer kinetics, e.g., the time-dependent interfacial turbulence like the Marangoni instability. 19) These factors should be discussed elsewhere.…”