Flow distribution and velocity measurement in a radial flow fixed bed reactor using electrical resistance tomography
Electrical resistance tomography is a relatively simple and inexpensive technique for imaging electrically conducting systems. It has been applied to visualise the flow pattern and distribution inside a radial flow packed bed of novel design for improving reactor performance with lower pressure drop...
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Published in | Chemical engineering science Vol. 59; no. 10; pp. 1989 - 1997 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
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Elsevier Ltd
01.05.2004
Elsevier |
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Abstract | Electrical resistance tomography is a relatively simple and inexpensive technique for imaging electrically conducting systems. It has been applied to visualise the flow pattern and distribution inside a radial flow packed bed of novel design for improving reactor performance with lower pressure drop. The density of information yielded by electrical tomography is suitable for validation of Computational fluid dynamics. Sets of tomographic images representing slices through a packed bed have been obtained for a 8-plane × 16-electrode sensor configuration which produces of the order 10
3 conductivity measurements in three-dimensions. Pulse injections of high conductivity tracer, both uniformly in the feed and localised, can be imaged as multiple tomographic images or 3D solid-body images, revealing the internal flow pattern. Differentiation of the motion of the tracer peak conductivity within pixels in the sensing planes and between the planes allows the local flow velocities and directions to be determined. This quantifies the flow pattern for uniformity and radial distributive properties. |
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AbstractList | Electrical resistance tomography is a relatively simple and inexpensive technique for imaging electrically conducting systems. It has been applied to visualise the flow pattern and distribution inside a radial flow packed bed of novel design for improving reactor performance with lower pressure drop. The density of information yielded by electrical tomography is suitable for validation of Computational fluid dynamics. Sets of tomographic images representing slices through a packed bed have been obtained for a 8-plane × 16-electrode sensor configuration which produces of the order 10
3 conductivity measurements in three-dimensions. Pulse injections of high conductivity tracer, both uniformly in the feed and localised, can be imaged as multiple tomographic images or 3D solid-body images, revealing the internal flow pattern. Differentiation of the motion of the tracer peak conductivity within pixels in the sensing planes and between the planes allows the local flow velocities and directions to be determined. This quantifies the flow pattern for uniformity and radial distributive properties. Electrical resistance tomography is a relatively simple and inexpensive technique for imaging electrically conducting systems. It has been applied to visualise the flow pattern and distribution inside a radial flow packed bed of novel design for improving reactor performance with lower pressure drop. The density of information yielded by electrical tomography is suitable for validation of Computational fluid dynamics. Sets of tomographic images representing slices through a packed bed have been obtained for a 8-plane x 16-electrode sensor configuration which produces of the order 10(super 3) conductivity measurements in three-dimensions. Pulse injections of high conductivity tracer, both uniformly in the feed and localised, can be imaged as multiple tomographic images or 3D solid-body images, revealing the internal flow pattern. Differentiation of the motion of the tracer peak conductivity within pixels in the sensing planes and between the planes allows the local flow velocities and directions to be determined. This quantifies the flow pattern for uniformity and radial distributive properties. |
Author | Stitt, E.H. Mann, R. Bolton, G.T. Hooper, C.W. |
Author_xml | – sequence: 1 givenname: G.T. surname: Bolton fullname: Bolton, G.T. email: gary.bolton@itoms.com organization: Industrial Tomography Systems, 47 Newton Street, Manchester, M1 1FT, UK – sequence: 2 givenname: C.W. surname: Hooper fullname: Hooper, C.W. organization: Johnson Matthey Catalysts, P.O. Box 1, Belasis Avenue, Billingham, Cleveland, TS23 1LB, UK – sequence: 3 givenname: R. surname: Mann fullname: Mann, R. organization: Department of Chemical Engineering, UMIST, P.O. Box 88, Manchester, M60 1QD, UK – sequence: 4 givenname: E.H. surname: Stitt fullname: Stitt, E.H. organization: Johnson Matthey Catalysts, P.O. Box 1, Belasis Avenue, Billingham, Cleveland, TS23 1LB, UK |
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Keywords | Tomography Fluid mechanics Packed bed Radial Imaging Flow Computational fluid dynamics Pulse Fixed bed reactor Radial flow Hydrodynamics Flow field Density Design Electrodes Internal flow Pressure drop Flow velocity Tracers |
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References | Tierney, Nasr, Quarini (BIB6) 1998; 13 Lucas, Cory, Waterfall, Loh, Dickin (BIB2) 1999; 10 Vlaev, Wang, Dyakowski, Mann, Grieve (BIB7) 2000; 77 Sie, S.T., Calis, H.P., 1996. Parallel-passage and lateral flow reactors. In: Cybulski, A., Moulijn, J.A. (Eds.), Structured catalysts and reactors. Marcel Dekker Inc, New York, p. 339 (Chapter 12). Williams, R.A., Beck, M.S. (Eds.), 1995. Process tomography—principles, techniques and applications. Butterworth-Heinemann, Stonecham, MA, ISBN 0 7506 0744 0. Williams, Jia, West, Wang, Cullivan, Bond, Faulks, Dyakowski, Wang, Climpson, Kostuch, Payton (BIB10) 1999; 12 Mann, Dickin, Wang, Dyakowski, Williams, Edwards, Forrest, Holden (BIB3) 1997; 52 Wang, M., Jia, X., Williams, R.A., 2000. Electrical tomographic imaging for bubble column measurement and control. Proceedings of SPIE, Process Imaging for Automatic Control, 4188, Boston, USA, 5–6 November 2000. Holden, Wang, Mann, Dickin, Edwards (BIB1) 1998; 4 Polydorides, Lionheart (BIB4) 2002; 13 10.1016/j.ces.2004.01.049_BIB9 10.1016/j.ces.2004.01.049_BIB8 Tierney (10.1016/j.ces.2004.01.049_BIB6) 1998; 13 Polydorides (10.1016/j.ces.2004.01.049_BIB4) 2002; 13 10.1016/j.ces.2004.01.049_BIB5 Lucas (10.1016/j.ces.2004.01.049_BIB2) 1999; 10 Williams (10.1016/j.ces.2004.01.049_BIB10) 1999; 12 Mann (10.1016/j.ces.2004.01.049_BIB3) 1997; 52 Holden (10.1016/j.ces.2004.01.049_BIB1) 1998; 4 Vlaev (10.1016/j.ces.2004.01.049_BIB7) 2000; 77 |
References_xml | – volume: 10 start-page: 249 year: 1999 end-page: 258 ident: BIB2 article-title: Measurement of the solids volume fraction and velocity distributions in solids–liquid flows using dual-plane electrical resistance tomography publication-title: Flow Measurement and Instrumentation contributor: fullname: Dickin – volume: 52 start-page: 2087 year: 1997 end-page: 2097 ident: BIB3 article-title: Application of electrical resistance tomography to interrogate mixing processes at plant scale publication-title: Chemical Engineering Science contributor: fullname: Holden – volume: 13 start-page: 97 year: 1998 end-page: 107 ident: BIB6 article-title: The use of proprietary computational fluid dynamics codes for flows in annular packed beds publication-title: Separation and Purification Technology contributor: fullname: Quarini – volume: 12 start-page: 1245 year: 1999 end-page: 1252 ident: BIB10 article-title: Industrial monitoring of hydrocyclone operation using electrical resistance tomography publication-title: Minerals Engineering contributor: fullname: Payton – volume: 77 start-page: 87 year: 2000 end-page: 92 ident: BIB7 article-title: Detecting filter-cake pathologies in solid–liquid filtration publication-title: Chemical Engineering Journal contributor: fullname: Grieve – volume: 13 start-page: 1871 year: 2002 end-page: 1883 ident: BIB4 article-title: A Matlab toolkit for three-dimensional electrical impedance tomography publication-title: Measurement Science and Technology contributor: fullname: Lionheart – volume: 4 start-page: 780 year: 1998 end-page: 790 ident: BIB1 article-title: Imaging stirred-vessel macromixing using electrical resistance tomography publication-title: AIChE. Journal contributor: fullname: Edwards – volume: 12 start-page: 1245 issue: 10 year: 1999 ident: 10.1016/j.ces.2004.01.049_BIB10 article-title: Industrial monitoring of hydrocyclone operation using electrical resistance tomography publication-title: Minerals Engineering doi: 10.1016/S0892-6875(99)00109-0 contributor: fullname: Williams – volume: 13 start-page: 1871 issue: 12 year: 2002 ident: 10.1016/j.ces.2004.01.049_BIB4 article-title: A Matlab toolkit for three-dimensional electrical impedance tomography publication-title: Measurement Science and Technology doi: 10.1088/0957-0233/13/12/310 contributor: fullname: Polydorides – ident: 10.1016/j.ces.2004.01.049_BIB9 doi: 10.1016/B978-0-08-093801-1.50005-8 – volume: 4 start-page: 780 year: 1998 ident: 10.1016/j.ces.2004.01.049_BIB1 article-title: Imaging stirred-vessel macromixing using electrical resistance tomography publication-title: AIChE. Journal doi: 10.1002/aic.690440403 contributor: fullname: Holden – volume: 10 start-page: 249 year: 1999 ident: 10.1016/j.ces.2004.01.049_BIB2 article-title: Measurement of the solids volume fraction and velocity distributions in solids–liquid flows using dual-plane electrical resistance tomography publication-title: Flow Measurement and Instrumentation doi: 10.1016/S0955-5986(99)00010-2 contributor: fullname: Lucas – volume: 52 start-page: 2087 issue: 13 year: 1997 ident: 10.1016/j.ces.2004.01.049_BIB3 article-title: Application of electrical resistance tomography to interrogate mixing processes at plant scale publication-title: Chemical Engineering Science doi: 10.1016/S0009-2509(97)00036-5 contributor: fullname: Mann – volume: 13 start-page: 97 year: 1998 ident: 10.1016/j.ces.2004.01.049_BIB6 article-title: The use of proprietary computational fluid dynamics codes for flows in annular packed beds publication-title: Separation and Purification Technology doi: 10.1016/S1383-5866(97)00060-9 contributor: fullname: Tierney – volume: 77 start-page: 87 year: 2000 ident: 10.1016/j.ces.2004.01.049_BIB7 article-title: Detecting filter-cake pathologies in solid–liquid filtration publication-title: Chemical Engineering Journal doi: 10.1016/S1385-8947(99)00142-4 contributor: fullname: Vlaev – ident: 10.1016/j.ces.2004.01.049_BIB5 – ident: 10.1016/j.ces.2004.01.049_BIB8 doi: 10.1117/12.417156 |
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SubjectTerms | Applied sciences Chemical engineering Exact sciences and technology Flow Fluid mechanics Imaging Miscellaneous Packed bed Radial Tomography |
Title | Flow distribution and velocity measurement in a radial flow fixed bed reactor using electrical resistance tomography |
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