Study on the influence of solids volume fraction on filter cake structures using micro tomography
Prediction of micro processes, filter cake build-up and porous media flow is a key challenge to describe macroscopic parameters like filter cake resistance. This is based on a precise description, not only of the disperse solid fraction, but the distributed properties of the voids between the partic...
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| Veröffentlicht in: | Powder technology 2020-03, Vol.363, p.286-299 |
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| creator | Löwer, E. Pham, T.H. Leißner, T. Peuker, U.A. |
| description | Prediction of micro processes, filter cake build-up and porous media flow is a key challenge to describe macroscopic parameters like filter cake resistance. This is based on a precise description, not only of the disperse solid fraction, but the distributed properties of the voids between the particles. Lab-experiments are carried out with alumina and limestone, which differ in particle size distribution (PSD) and resulting filter cake structure. Filter cakes of both materials are characterized by standardized lab tests and additionally, alumina cakes are measured with X-ray microscopy (XRM). Focusing on distributed process key parameters, the data gives a deeper understanding of the laboratory experiments.
The solid volume fraction inside the feed strongly influences the particle sedimentation and leads typically to a top layer formation of fine particles in the final filter cake, which has a negative influence on subsequent process steps. The top layers seal the filter cake for washing liquid and increase the capillary entry pressure for gas differential pressure de-watering. The influence on cake structure can be seen in a change of porosity, particle size and shape distribution over the height of the filter cake. In all measurements, homogenous filter cake structures could only be achieved by increasing the solid volume fraction inside the suspension above a certain percentage, at which particle size related sedimentation effects could be neglected and only zone sedimentation occurred. XRM offers the chance to quantify these effects, which previously could only be described qualitatively.
[Display omitted]
•A downscale of lab nutsch according to VDI 2762 allows in-situ x-ray measurements.•Particle properties along the filter cake height are analysed by micro tomography.•Sedimentation effect in filtration is detected by top layer formation.•Further increase in feed solid fraction reduces particle property deviation.•Feed solid fraction influences cake structure and so filter cake resistance. |
| doi_str_mv | 10.1016/j.powtec.2019.12.054 |
| format | Article |
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The solid volume fraction inside the feed strongly influences the particle sedimentation and leads typically to a top layer formation of fine particles in the final filter cake, which has a negative influence on subsequent process steps. The top layers seal the filter cake for washing liquid and increase the capillary entry pressure for gas differential pressure de-watering. The influence on cake structure can be seen in a change of porosity, particle size and shape distribution over the height of the filter cake. In all measurements, homogenous filter cake structures could only be achieved by increasing the solid volume fraction inside the suspension above a certain percentage, at which particle size related sedimentation effects could be neglected and only zone sedimentation occurred. XRM offers the chance to quantify these effects, which previously could only be described qualitatively.
[Display omitted]
•A downscale of lab nutsch according to VDI 2762 allows in-situ x-ray measurements.•Particle properties along the filter cake height are analysed by micro tomography.•Sedimentation effect in filtration is detected by top layer formation.•Further increase in feed solid fraction reduces particle property deviation.•Feed solid fraction influences cake structure and so filter cake resistance.</description><identifier>ISSN: 0032-5910</identifier><identifier>EISSN: 1873-328X</identifier><identifier>DOI: 10.1016/j.powtec.2019.12.054</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Aluminum oxide ; Capillary pressure ; Differential pressure ; Filter cake ; Image processing ; Influence ; Laboratory tests ; Limestone ; Microporous structure ; Microtomography ; Particle properties ; Particle size ; Particle size distribution ; Porosity ; Porous media ; Process parameters ; Sedimentation ; Sedimentation & deposition ; Size distribution ; Three-dimensional geometric analysis ; X ray microscopy ; X-ray microtomography</subject><ispartof>Powder technology, 2020-03, Vol.363, p.286-299</ispartof><rights>2020 Elsevier B.V.</rights><rights>Copyright Elsevier BV Mar 1, 2020</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c334t-2e179fb1ddc2e0e8a787d89e60d10a90f9675cc9c10fb238169b655a7bb5e5ea3</citedby><cites>FETCH-LOGICAL-c334t-2e179fb1ddc2e0e8a787d89e60d10a90f9675cc9c10fb238169b655a7bb5e5ea3</cites><orcidid>0000-0002-6956-8054</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0032591019311593$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,65309</link.rule.ids></links><search><creatorcontrib>Löwer, E.</creatorcontrib><creatorcontrib>Pham, T.H.</creatorcontrib><creatorcontrib>Leißner, T.</creatorcontrib><creatorcontrib>Peuker, U.A.</creatorcontrib><title>Study on the influence of solids volume fraction on filter cake structures using micro tomography</title><title>Powder technology</title><description>Prediction of micro processes, filter cake build-up and porous media flow is a key challenge to describe macroscopic parameters like filter cake resistance. This is based on a precise description, not only of the disperse solid fraction, but the distributed properties of the voids between the particles. Lab-experiments are carried out with alumina and limestone, which differ in particle size distribution (PSD) and resulting filter cake structure. Filter cakes of both materials are characterized by standardized lab tests and additionally, alumina cakes are measured with X-ray microscopy (XRM). Focusing on distributed process key parameters, the data gives a deeper understanding of the laboratory experiments.
The solid volume fraction inside the feed strongly influences the particle sedimentation and leads typically to a top layer formation of fine particles in the final filter cake, which has a negative influence on subsequent process steps. The top layers seal the filter cake for washing liquid and increase the capillary entry pressure for gas differential pressure de-watering. The influence on cake structure can be seen in a change of porosity, particle size and shape distribution over the height of the filter cake. In all measurements, homogenous filter cake structures could only be achieved by increasing the solid volume fraction inside the suspension above a certain percentage, at which particle size related sedimentation effects could be neglected and only zone sedimentation occurred. XRM offers the chance to quantify these effects, which previously could only be described qualitatively.
[Display omitted]
•A downscale of lab nutsch according to VDI 2762 allows in-situ x-ray measurements.•Particle properties along the filter cake height are analysed by micro tomography.•Sedimentation effect in filtration is detected by top layer formation.•Further increase in feed solid fraction reduces particle property deviation.•Feed solid fraction influences cake structure and so filter cake resistance.</description><subject>Aluminum oxide</subject><subject>Capillary pressure</subject><subject>Differential pressure</subject><subject>Filter cake</subject><subject>Image processing</subject><subject>Influence</subject><subject>Laboratory tests</subject><subject>Limestone</subject><subject>Microporous structure</subject><subject>Microtomography</subject><subject>Particle properties</subject><subject>Particle size</subject><subject>Particle size distribution</subject><subject>Porosity</subject><subject>Porous media</subject><subject>Process parameters</subject><subject>Sedimentation</subject><subject>Sedimentation & deposition</subject><subject>Size distribution</subject><subject>Three-dimensional geometric analysis</subject><subject>X ray microscopy</subject><subject>X-ray microtomography</subject><issn>0032-5910</issn><issn>1873-328X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><recordid>eNp9kM1LAzEQxYMoWKv_gYeA510nyX5eBCl-QcGDCt5CNjtps243NclW-t-7pZ6Fgbm892bej5BrBikDVtx26db9RNQpB1anjKeQZydkxqpSJIJXn6dkBiB4ktcMzslFCB0AFILBjKi3OLZ76gYa10jtYPoRB43UGRpcb9tAd64fN0iNVzraSTeNsX1ET7X6QhqiH3UcPQY6Bjus6MZq72h0G7fyarveX5Izo_qAV397Tj4eH94Xz8ny9ellcb9MtBBZTDiysjYNa1vNEbBSZVW2VY0FtAxUDaYuylzrWjMwDRcVK-qmyHNVNk2OOSoxJzfH3K133yOGKDs3-mE6KXmWFSXnlcgnVXZUTU-G4NHIrbcb5feSgTzAlJ08wpQHmJJxOcGcbHdHG04Ndha9DNoeQLXWo46ydfb_gF8EmYFm</recordid><startdate>20200301</startdate><enddate>20200301</enddate><creator>Löwer, E.</creator><creator>Pham, T.H.</creator><creator>Leißner, T.</creator><creator>Peuker, U.A.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7ST</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>JG9</scope><scope>SOI</scope><orcidid>https://orcid.org/0000-0002-6956-8054</orcidid></search><sort><creationdate>20200301</creationdate><title>Study on the influence of solids volume fraction on filter cake structures using micro tomography</title><author>Löwer, E. ; Pham, T.H. ; Leißner, T. ; Peuker, U.A.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-2e179fb1ddc2e0e8a787d89e60d10a90f9675cc9c10fb238169b655a7bb5e5ea3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><topic>Aluminum oxide</topic><topic>Capillary pressure</topic><topic>Differential pressure</topic><topic>Filter cake</topic><topic>Image processing</topic><topic>Influence</topic><topic>Laboratory tests</topic><topic>Limestone</topic><topic>Microporous structure</topic><topic>Microtomography</topic><topic>Particle properties</topic><topic>Particle size</topic><topic>Particle size distribution</topic><topic>Porosity</topic><topic>Porous media</topic><topic>Process parameters</topic><topic>Sedimentation</topic><topic>Sedimentation & deposition</topic><topic>Size distribution</topic><topic>Three-dimensional geometric analysis</topic><topic>X ray microscopy</topic><topic>X-ray microtomography</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Löwer, E.</creatorcontrib><creatorcontrib>Pham, T.H.</creatorcontrib><creatorcontrib>Leißner, T.</creatorcontrib><creatorcontrib>Peuker, U.A.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Environment Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Materials Research Database</collection><collection>Environment Abstracts</collection><jtitle>Powder technology</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Löwer, E.</au><au>Pham, T.H.</au><au>Leißner, T.</au><au>Peuker, U.A.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Study on the influence of solids volume fraction on filter cake structures using micro tomography</atitle><jtitle>Powder technology</jtitle><date>2020-03-01</date><risdate>2020</risdate><volume>363</volume><spage>286</spage><epage>299</epage><pages>286-299</pages><issn>0032-5910</issn><eissn>1873-328X</eissn><abstract>Prediction of micro processes, filter cake build-up and porous media flow is a key challenge to describe macroscopic parameters like filter cake resistance. This is based on a precise description, not only of the disperse solid fraction, but the distributed properties of the voids between the particles. Lab-experiments are carried out with alumina and limestone, which differ in particle size distribution (PSD) and resulting filter cake structure. Filter cakes of both materials are characterized by standardized lab tests and additionally, alumina cakes are measured with X-ray microscopy (XRM). Focusing on distributed process key parameters, the data gives a deeper understanding of the laboratory experiments.
The solid volume fraction inside the feed strongly influences the particle sedimentation and leads typically to a top layer formation of fine particles in the final filter cake, which has a negative influence on subsequent process steps. The top layers seal the filter cake for washing liquid and increase the capillary entry pressure for gas differential pressure de-watering. The influence on cake structure can be seen in a change of porosity, particle size and shape distribution over the height of the filter cake. In all measurements, homogenous filter cake structures could only be achieved by increasing the solid volume fraction inside the suspension above a certain percentage, at which particle size related sedimentation effects could be neglected and only zone sedimentation occurred. XRM offers the chance to quantify these effects, which previously could only be described qualitatively.
[Display omitted]
•A downscale of lab nutsch according to VDI 2762 allows in-situ x-ray measurements.•Particle properties along the filter cake height are analysed by micro tomography.•Sedimentation effect in filtration is detected by top layer formation.•Further increase in feed solid fraction reduces particle property deviation.•Feed solid fraction influences cake structure and so filter cake resistance.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.powtec.2019.12.054</doi><tpages>14</tpages><orcidid>https://orcid.org/0000-0002-6956-8054</orcidid></addata></record> |
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| subjects | Aluminum oxide Capillary pressure Differential pressure Filter cake Image processing Influence Laboratory tests Limestone Microporous structure Microtomography Particle properties Particle size Particle size distribution Porosity Porous media Process parameters Sedimentation Sedimentation & deposition Size distribution Three-dimensional geometric analysis X ray microscopy X-ray microtomography |
| title | Study on the influence of solids volume fraction on filter cake structures using micro tomography |
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