The surface filtration of oil in water dispersions with imposed fluid rotation

The separation of oil in water dispersions is an important process, with research principally concentrating upon polymeric and ceramic filters where the filtration mechanism is predominantly by capture within the depth of the filter. This work utilises novel metal filters which possess a non-tortuou...

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Main Author: Ian D. Smith
Format: Default Thesis
Published: 1998
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Online Access:https://hdl.handle.net/2134/13848
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spelling rr-article-92399061998-01-01T00:00:00Z The surface filtration of oil in water dispersions with imposed fluid rotation Ian D. Smith (7128128) Chemical engineering not elsewhere classified untagged Chemical Engineering not elsewhere classified The separation of oil in water dispersions is an important process, with research principally concentrating upon polymeric and ceramic filters where the filtration mechanism is predominantly by capture within the depth of the filter. This work utilises novel metal filters which possess a non-tortuous pore channel and so filter by a sieving mechanism. An evaluation of a variety of types of metal surface filters was conducted with a large proportion of the research focusing upon a filter possessing circular pores which open into a conical shape. Rejection of challenging emulsified oil droplets was solely by exclusion due to size at this pore. Enhancement of emulsion filtration was combined with the surface filters using a selection of rod and helical inserts within a tubular filter to modify the flow conditions; in the case of helical inserts to produce a centrifugal velocity upon the less dense oil droplets away from the filter surface. Further filtration enhancement was produced by air backflushing to alleviate fouling of the filter surface and electrolytic generation of bubbles to capture oil drops on bubbles. The latter method increased the overall feed size and should have increased the centrifugal separation by lowering particle or aggregate density. Research is also reported into the mechanism of rejection of emulsified oil droplets using filters with circular pores. The mechanism has been evaluated and shown to depend on the capillary pressure of deformable oil drops impinging upon the pore. A mathematical model is described, which predicts the deformation of drops using the physical properties of contact angle and interfacial tension combined with the properties of pore size, shape and droplet size. 1998-01-01T00:00:00Z Text Thesis 2134/13848 https://figshare.com/articles/thesis/The_surface_filtration_of_oil_in_water_dispersions_with_imposed_fluid_rotation/9239906 CC BY-NC-ND 4.0
institution Loughborough University
collection Figshare
topic Chemical engineering not elsewhere classified
untagged
Chemical Engineering not elsewhere classified
spellingShingle Chemical engineering not elsewhere classified
untagged
Chemical Engineering not elsewhere classified
Ian D. Smith
The surface filtration of oil in water dispersions with imposed fluid rotation
description The separation of oil in water dispersions is an important process, with research principally concentrating upon polymeric and ceramic filters where the filtration mechanism is predominantly by capture within the depth of the filter. This work utilises novel metal filters which possess a non-tortuous pore channel and so filter by a sieving mechanism. An evaluation of a variety of types of metal surface filters was conducted with a large proportion of the research focusing upon a filter possessing circular pores which open into a conical shape. Rejection of challenging emulsified oil droplets was solely by exclusion due to size at this pore. Enhancement of emulsion filtration was combined with the surface filters using a selection of rod and helical inserts within a tubular filter to modify the flow conditions; in the case of helical inserts to produce a centrifugal velocity upon the less dense oil droplets away from the filter surface. Further filtration enhancement was produced by air backflushing to alleviate fouling of the filter surface and electrolytic generation of bubbles to capture oil drops on bubbles. The latter method increased the overall feed size and should have increased the centrifugal separation by lowering particle or aggregate density. Research is also reported into the mechanism of rejection of emulsified oil droplets using filters with circular pores. The mechanism has been evaluated and shown to depend on the capillary pressure of deformable oil drops impinging upon the pore. A mathematical model is described, which predicts the deformation of drops using the physical properties of contact angle and interfacial tension combined with the properties of pore size, shape and droplet size.
format Default
Thesis
author Ian D. Smith
author_facet Ian D. Smith
author_sort Ian D. Smith (7128128)
title The surface filtration of oil in water dispersions with imposed fluid rotation
title_short The surface filtration of oil in water dispersions with imposed fluid rotation
title_full The surface filtration of oil in water dispersions with imposed fluid rotation
title_fullStr The surface filtration of oil in water dispersions with imposed fluid rotation
title_full_unstemmed The surface filtration of oil in water dispersions with imposed fluid rotation
title_sort surface filtration of oil in water dispersions with imposed fluid rotation
publishDate 1998
url https://hdl.handle.net/2134/13848
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