caa a22 4500 378928007 CHVBK 20180305123622.0 cr unu---uuuuu 161128e20041108xx s 000 0 eng 10.2202/1542-6580.1155 doi (NATIONALLICENCE)gruyter-10.2202/1542-6580.1155 Hydrodynamic and Mass Transfer Parameters in Agitated Reactors Part I: Critical Mixing Speed, Induced Gas Flow Rate, and Wavy Surface in SARs and GIRs [Elektronische Daten] [Romain Lemoine, Benoit Fillion, Badie I Morsi] The critical mixing speed for gas entrainment (NCRE), for gas induction (NCRI), induced gas flow rate (QGI) as well as the wavy gas-liquid interfacial area (aWave) of N2 and air were measured in pure toluene and three mixtures of organic liquids (toluene-benzoic acid-benzaldehyde mixtures) under wide ranges of temperatures, T (300-453K), pressures, P (1-15 bar), mixing speeds, N (13.3-23.3Hz) and liquid heights, H (0.171-0.268m) using a 4-liter, see-through agitated autoclave operating as a surface-aeration reactor (SAR) and gas-inducing reactor (GIR).NCRE and NCRI as well as aWave were estimated by analyzing the videos taken with an on-line high-speed Phantom camera through the reactor’s Jerguson windows. In the GIR, QGI was determined using a highly sensitive Coriolis mass flow meter. The Central Composite Statistical Design and analysis technique was used to study the effect of operating conditions on these hydrodynamic parameters.NCRE and NCRI appeared to increase with liquid height and decrease with temperature, whereas, the pressure and gas nature did not significantly affect both parameters. The liquid physicochemical properties were found to strongly affect NCRE and NCRI, and QGI. Increasing mixing speed or decreasing liquid height increased QGI. Increasing temperature or decreasing liquid viscosity initially increased and then decreased QGI. Increasing pressure or gas density on the other hand decreased QGI. Increasing mixing speed and temperature or decreasing liquid height significantly enhanced aWave, as compared to the flat liquid surface. At high pressures, however, lower values of aWave were obtained. Empirical and statistical correlations were also developed to accurately predict NCRE, NCRI, QGI and aWave. ©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston Agitated reactors nationallicence Hydrodynamics nationallicence Mass Transfer nationallicence Absorption nationallicence Hydrodynamics nationallicence Agitated Reactors nationallicence Critical Mixing Speed nationallicence Induced Gas Flow Rate nationallicence Lemoine Romain University of Pittsburgh, rlemoine@pitt.edu aut Fillion Benoit isodisnatura, benoit@isodisnatura.com aut Morsi Badie I. University of Pittsburgh, morsi@pitt.edu aut International Journal of Chemical Reactor Engineering De Gruyter 2/1(2004-11-08) 2:1 2004 2 ijcre https://doi.org/10.2202/1542-6580.1155 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.2202/1542-6580.1155 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lemoine Romain University of Pittsburgh, rlemoine@pitt.edu aut NATIONALLICENCE 700 1- Fillion Benoit isodisnatura, benoit@isodisnatura.com aut NATIONALLICENCE 700 1- Morsi Badie I. University of Pittsburgh, morsi@pitt.edu aut NATIONALLICENCE 773 0- International Journal of Chemical Reactor Engineering De Gruyter 2/1(2004-11-08) 2:1 2004 2 ijcre CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter