Correlation of C–P cell and filtration test data using a new test cell

Teoh, S.K.; Tan, Reginald B. H.; Tien, Chi

doi:10.1016/s1383-5866(02)00069-2

Cited by 8 publications

(4 citation statements)

References 6 publications

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“…[33][34][35][36][37][38][39][40][41] The filter medium was equal to the commercially used filters for pressure slip casting with an average pore size of d 50 ¼ 20 mm. The pressure difference can be adjusted pneumatically or by a pneumatic cylinder.…”

Section: Filtration Behaviormentioning

confidence: 99%

Shaped Coarse Grained Refractories by Pressure Slip Casting

2010

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The possibility of pressure slip casting of carbon free refractory suspensions with optimized grain size distributions and particle diameters in the range of millimeters is investigated. The slip flow ability is examined by conducting experiments with a newly developed falling sphere viscometer. Segregation is determined by microscopy on polished samples and computer tomography. Fundamental characteristics of cake filtration are adopted to highlight the significant influences on the pressure slip casting process. Based on the laboratory experiments the results of scale up trails are presented which were conducted with a commercial pressure slip casting machine, remodeled for suspensions containing coarse grains.

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Section: Filtration Behaviormentioning

confidence: 99%

Shaped Coarse Grained Refractories by Pressure Slip Casting

2010

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“…Thus, the effective pressure is the sum of the drag, surface, and body forces divided by the cross‐sectional area 18. The effective pressure has also been variously denoted as solid compressive pressure,19 solid stress,20 accumulated drag pressure,21 and particle pressure 22…”

Section: Traditional Cake Filtration Theorymentioning

confidence: 99%

“…The value of m has been calculated to be 5 ± 2 (standard deviation) by using data from 20 different filtration experiments. These data were obtained from filtrations of attapulgite,33 CaCO 3 with a mean diameter of 3.41 μm and kaolin with a mean diameter of 2.22 μm,19 Hong Kong kaolin, kaolin, Mierlo biosolid, activated sludge, water treatment residue, carbon iron grade E,18 CaCO 3 with an average particle size of 5 μm and CiSiO 3 with an average particle size of 10 μm,29 a mixture of 66.7% TiO 2 and 33.3% perlite,17 industrial sludge,34 and conditioned activated sludge 14. Moreover, data from six experiments performed on CaCO 3 were included 35…”

Section: Cake Filtration Theory For Filter Cakes That Creepmentioning

confidence: 99%

Filtration model for suspensions that form filter cakes with creep behavior

Christensen

Keiding

2007

AIChE Journal

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in Wiley InterScience (www.interscience.wiley.com).Waste-activated sludge was filtered and the formed filter cake studied. It was shown that average specific filter-cake resistance increases during filtration. A stress-relaxation experiment was performed and the two relaxation times found were of the same order of magnitude as the duration of the filtration stage. It was therefore concluded that the local solid volume fraction of sludge filter cakes changes not only with effective pressure but also with time. In contrast, it is usually assumed in filtration modeling that solid volume fraction is a unique function of effective pressure. A new filtration model was thus developed by adopting the concept of filter-cake creep and applying it in conventional models. It was shown that the model developed, unlike conventional filtration models, satisfactorily describes the experimental data in the case of waste-activated sludge. Furthermore, the model is capable of being scaled with respect to feed concentration and volume.

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“…Using modern electronic and computer control, Tarleton developed a mechatronic filtration apparatus. Another exemple of filtration apparatus was developed at the National University of Singapore and serves as a C‐P cell as well as a filtration chamber. However, those apparatus are not conceived to measure the low permeabilities associated with ceramic particle deposits, the relatively small volume of filtrate produced using highly concentrated slurries and are not designed to withhold fibrous reinforcements.…”

Section: Introductionmentioning

confidence: 99%

Novel device for in situ process characterization of oxide/oxide ceramic matrix composites fabricated by flexible injection

et al. 2018

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In this work, a new manufacturing process of CMC by liquid molding was stud-ied. An instrumented device has been developed to characterize the through-thickness impregnation of ceramic fibers by a slurry charged with submicron ceramic particles. This instrument was used to characterize the permeability of the fibrous reinforcement and the formation of the ceramic cake by filtration of a ceramic particle suspension. Slurries containing different concentrations (10, 25, 33, and 40 vol%) of mono-dispersed alumina particles were filtered under different pressure conditions (345, 415, 485 kPa) to optimize the cake formation and filling of fibrous reinforcements while controlling the porosity level. Ceramic cakes exhibited an average permeability of 1.0 × 10 −17 m 2 while the manufactured all-oxide composites resulted in a permeability of 0.6 × 10 −17 m 2 . Furthermore, a mathematical model based on Darcy's law was developed in this study to predict the rate of filtering and cake formation during injection using the permeability and filtration data measured with the experimental device. This mathematical model allows to determine the filtration time to produce a dense ceramic composite with an accuracy of ±15%, which corresponds to an error of less than 0.1 mm on the thickness of formed CMC. K E Y W O R D Sceramic-matrix composites, liquid composite molding, permeability

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Correlation of C–P cell and filtration test data using a new test cell

Cited by 8 publications

References 6 publications

Shaped Coarse Grained Refractories by Pressure Slip Casting

Shaped Coarse Grained Refractories by Pressure Slip Casting

Filtration model for suspensions that form filter cakes with creep behavior

Novel device for in situ process characterization of oxide/oxide ceramic matrix composites fabricated by flexible injection

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