Characterisation of axial dispersion in a Meso-scale Oscillatory Baffled Crystalliser using a Numerical Approach

被引：7

作者：

Kimuli, Emmanuel N. ^{[1
]}

Onyemelukwe, Iyke I. ^{[1
]}

Benyahia, Brahim ^{[1
]}

Rielly, Chris D. ^{[1
]}

机构：

[1] Loughbororough Univ, Dept Chem Engn, Loughborough LE11 3TU, Leics, England

来源：

27TH EUROPEAN SYMPOSIUM ON COMPUTER AIDED PROCESS ENGINEERING, PT A | 2017年 / 40A卷

基金：

英国工程与自然科学研究理事会;

关键词：

Axial dispersion coefficient; CFD; meso-scale oscillatory baffled crystalliser; RTD; FLOW PATTERNS; REACTOR;

D O I：

10.1016/B978-0-444-63965-3.50039-8

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A meso-scale oscillatory baffled crystalliser (meso-OBC) of 5 mm diameter was characterised using Computational Fluid Dynamics (CFD). Residence time distributions (RTD) and axial dispersion coefficients were investigated for a range of oscillation frequencies (2, 6 and 12 Hz), amplitudes (0.5, 1 and 2 mm centre-to-peak) and net flow rates (2 and 5 ml/min) to determine operating conditions that delivered near plug flow behaviour. RTD parameters were fitted to the computed concentration profiles using an axial dispersion model with an imperfect pulse input. The narrowest RTD curve and lowest axial dispersion coefficient was obtained at oscillatory conditions of 6 Hz frequency and 0.5 mm amplitude. The numerical data is validated against experimentally obtained axial dispersion coefficient and the results are in good agreement.

引用

页码：223 / 228

页数：6

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