Numerical simulations of the reactive mixing in a commercially operated stirred ethoxylation reactor

Controle de segurança para reação de etoxilação em um reator semi-batelada

“…O processo de etoxilação do nonilfenol utilizando o KOH como catalisador é geralmente avaliado do ponto de vista da cinética e dos mecanismos reacionais (Santacesaria et al, 1990;Di Serio et al, 1995;Santacesaria et al, 1995;Santacesaria et al, 1999, Chiu et al, 2010. Chiu et al (2008Chiu et al ( e 2009 realizaram avaliações fluidodinâmicas. Por outro lado, trabalhos publicados sob a perspectiva da dinâmica e controle deste processo são escassos.…”

Particle Image Velocimetry Experiments and Large Eddy Simulations of Merging Flow Characteristics in Dual Rushton Turbine Stirred Tanks

“…However, they also pointed out that the experimental velocity and TKE results were read from the published vectors and contours of Rutherford et al, respectively, so there might be errors involved in reading the data. Brucato et al assessed the impeller modeling applicability of IO procedure using the dual Rushton turbine problems and the experimental results of Rutherford et al Deshpande and Ranade verified the computational snapshot approach using the LDV data of Rutherford et al and the simulated results of Micale et al The dual Rushton turbine problem under merging flow pattern was used by Chiu et al , to validate their CFD modeling method before they conducted the flow and reactive mixing simulation of industrial ethoxylation reactors. Montante and Magelli investigated the homogenization process in a multiple Rushton turbines stirred vessel using a Reynolds averaged Navier–Stokes (RANS) based CFD method and found that the turbulent Schmidt number has great influence on the simulated mixing characteristics, and a value of 0.10 is recommended to obtain accurate predicted results.…”