Simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers

The performance of two impellers (Rushton and Elephant ear) for waste cooking oil (WCO) transesterification were experimentally and numerically evaluated inside a unbaffled and baffled stirred tank reactor (STR). Three parameters (impeller bottom distance (C), speed, (N) and temperature) were i...

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Main Authors:	Mohiuddin, A. K. M., Adeyemi, Nabeel A., Mirghani, Mohamed Elwathig Saeed, Aibinu, Abiodun Musa, Aziz, Rashid A., Firmansyah, F., Anbese, Yohannes Tamirat
Format:	Conference or Workshop Item
Language:	English
Published:	2011
Subjects:	T Technology (General)
Online Access:	http://irep.iium.edu.my/7087/ http://irep.iium.edu.my/7087/ http://irep.iium.edu.my/7087/1/755-064.pdf

id	iium-7087
recordtype	eprints
spelling	iium-70872011-11-21T15:26:18Z http://irep.iium.edu.my/7087/ Simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers Mohiuddin, A. K. M. Adeyemi, Nabeel A. Mirghani, Mohamed Elwathig Saeed Aibinu, Abiodun Musa Aziz, Rashid A. Firmansyah, F. Anbese, Yohannes Tamirat T Technology (General) The performance of two impellers (Rushton and Elephant ear) for waste cooking oil (WCO) transesterification were experimentally and numerically evaluated inside a unbaffled and baffled stirred tank reactor (STR). Three parameters (impeller bottom distance (C), speed, (N) and temperature) were investigated for fatty acid methyl esters (FAME) yield using a Taguchi orthogonal array (OA) experimental design. The mixing study is based on the �-� and large eddy simulation (LES) turbulent model using a multiple reference frame (MRF) approach and the result was validated by particle image velocimetry (PIV) measurement. Overall flow structure in the baffled in STR was isotropic at C = 20, 25 and 30 mm for Rushton and to a lesser extent at the STR centre in the unbaffled STR. Mean radial velocities of the Elephant ear impeller was about 25-30% of the Rushton impeller for 600 rpm and 85-90% in baffled STR at C = 30 mm in the unbaffled STR. CFD results of �-� and LES results were qualitatively similar at mid-impeller plane than for the other parts of the STR. However, none of the model could capture the vortex trailing encountered with Rushton impeller. Experimental mixing time, a function of FAME yield and liquid velocities were found to be dependent on stirrer speeds, impeller bottom distance and bulk flow pattern. The study demonstrated the effect of different impeller types used in the laboratory on FAME yield and attributed to flow characteristics. This model is being used to evaluate other conditions of the reactions. 2011 Conference or Workshop Item PeerReviewed application/pdf en http://irep.iium.edu.my/7087/1/755-064.pdf Mohiuddin, A. K. M. and Adeyemi, Nabeel A. and Mirghani, Mohamed Elwathig Saeed and Aibinu, Abiodun Musa and Aziz, Rashid A. and Firmansyah, F. and Anbese, Yohannes Tamirat (2011) Simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers. In: The IASTED International Conference on Modelling, Simulation, and Identification (MSI 2011), 7-9 Nov 2011, Pittsburgh, USA. http://www.iasted.org/conferences/pastinfo-755.html
repository_type	Digital Repository
institution_category	Local University
institution	International Islamic University Malaysia
building	IIUM Repository
collection	Online Access
language	English
topic	T Technology (General)
spellingShingle	T Technology (General) Mohiuddin, A. K. M. Adeyemi, Nabeel A. Mirghani, Mohamed Elwathig Saeed Aibinu, Abiodun Musa Aziz, Rashid A. Firmansyah, F. Anbese, Yohannes Tamirat Simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers
description	The performance of two impellers (Rushton and Elephant ear) for waste cooking oil (WCO) transesterification were experimentally and numerically evaluated inside a unbaffled and baffled stirred tank reactor (STR). Three parameters (impeller bottom distance (C), speed, (N) and temperature) were investigated for fatty acid methyl esters (FAME) yield using a Taguchi orthogonal array (OA) experimental design. The mixing study is based on the �-� and large eddy simulation (LES) turbulent model using a multiple reference frame (MRF) approach and the result was validated by particle image velocimetry (PIV) measurement. Overall flow structure in the baffled in STR was isotropic at C = 20, 25 and 30 mm for Rushton and to a lesser extent at the STR centre in the unbaffled STR. Mean radial velocities of the Elephant ear impeller was about 25-30% of the Rushton impeller for 600 rpm and 85-90% in baffled STR at C = 30 mm in the unbaffled STR. CFD results of �-� and LES results were qualitatively similar at mid-impeller plane than for the other parts of the STR. However, none of the model could capture the vortex trailing encountered with Rushton impeller. Experimental mixing time, a function of FAME yield and liquid velocities were found to be dependent on stirrer speeds, impeller bottom distance and bulk flow pattern. The study demonstrated the effect of different impeller types used in the laboratory on FAME yield and attributed to flow characteristics. This model is being used to evaluate other conditions of the reactions.
format	Conference or Workshop Item
author	Mohiuddin, A. K. M. Adeyemi, Nabeel A. Mirghani, Mohamed Elwathig Saeed Aibinu, Abiodun Musa Aziz, Rashid A. Firmansyah, F. Anbese, Yohannes Tamirat
author_facet	Mohiuddin, A. K. M. Adeyemi, Nabeel A. Mirghani, Mohamed Elwathig Saeed Aibinu, Abiodun Musa Aziz, Rashid A. Firmansyah, F. Anbese, Yohannes Tamirat
author_sort	Mohiuddin, A. K. M.
title	Simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers
title_short	Simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers
title_full	Simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers
title_fullStr	Simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers
title_full_unstemmed	Simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers
title_sort	simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers
publishDate	2011
url	http://irep.iium.edu.my/7087/ http://irep.iium.edu.my/7087/ http://irep.iium.edu.my/7087/1/755-064.pdf
first_indexed	2023-09-18T20:16:20Z
last_indexed	2023-09-18T20:16:20Z
_version_	1777407812746346496

Simulation and experimental validation: waste cooking oil transesterification using rushton and elephant ear impellers

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