scholarly journals Fabrication and Characterization of Ice Templated Membrane Supports from Portland Cement

Membranes ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 93
Author(s):  
Amanmyrat Abdullayev ◽  
Paul H. Kamm ◽  
Maged F. Bekheet ◽  
Aleksander Gurlo
Keyword(s):  
High Temperature ◽  
Portland Cement ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Ceramic Membranes ◽  
Fabrication Process ◽  
Transmembrane Pressure ◽  
Hydration Reaction ◽  
Membrane Thickness ◽  
Membrane Fabrication

Porous ceramic membranes for aqueous microfiltration and ultrafiltration processes suffer from the high-costs of material and processing. The latter is mainly due to the high-temperature sintering step. In this work, cement-based membrane supports from ultrafine Portland cement are studied as a low-cost alternative to traditional oxidic ceramic supports. An environmentally friendly freeze-casting fabrication route is applied for the fabrication of porous membrane supports. Cement membrane supports are becoming mechanically stabile after hydration reaction of cement with water, which does not require any high-temperature sintering step as in a conventional ceramic membrane fabrication process. This fabrication route, which is sintering-free, decreases the cost and environmental impact of the membrane fabrication process by eliminating extra energy consumption step during sintering. The Archimedes method, scanning electron microscopy (SEM), micro-computed tomographic (µCT), and mercury porosimetry characterize the membrane supports in respect to open porosity, pore size distribution, morphology, and connectivity. The flexural strength of the 3 mm thick membranes is in the range from 1 to 6 MPa, as obtained by the ring-on-ring tests. The obtained membrane supports possess porosity in the range between 48 and 73% depending on fabrication conditions (cooling rate and the solid content, as determined by Archimedes method enabling water flux in the range between 79 and 180 L/(h·m2) at 0.5 bar transmembrane pressure difference and 3 mm membrane thickness.

Mass Transfer in Tubular Ceramic Membranes for Polluted Water Treatment - Numerical Simulation

2018 ◽  
Vol 20 ◽  
pp. 16-33 ◽  
Author(s):  
J. Saraiva de Souza ◽  
S. José dos Santos Filho ◽  
Severino Rodrigues de Farias Neto ◽  
A.G. Barbosa de Lima ◽  
H.A. Luma Fernandes Magalhães
Keyword(s):  
Mass Transfer ◽  
Water Treatment ◽  
Produced Water ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Ceramic Membranes ◽  
Numerical Results ◽  
Polluted Water ◽  
Separation Processes ◽  
Water Separation

Innovative technologies are needed to attend the increasingly strict requirements for produced water treatment, since most of the separation processes are limited to particles larger than 10 μm. Separation processes using ceramic membranes are attracting great interest from academic and industrial community. Nevertheless, few studies, especially numerical, regarding the inorganic membrane’s application for the polluted water separation have been reported. In the present work, therefore, a study of fluid-flow dynamics for a laminar regime in porous tubes (tubular porous ceramic membrane) has been performed. The mass, momentum and mass transport conservation equations were solved with the aid of a structured mesh using ANSYS CFX commercial package. The velocity of local permeation was determined using the resistance in series model. The specific resistance of the polarized layer was obtained by Carman-Kozeny equation. The numerical results were evaluated and compared with the results available in the literature, where by a good agreement with each other was found. The numerical results, obtained by the proposed shell and tubular membrane separation module, indicate that there is facilitation of mass transfer and hence a reduction in the thickness of the polarized boundary layer occurs.

scholarly journals Preparation of a High-Performance Porous Ceramic Membrane by a Two-Step Coating Method and One-Step Sintering

2018 ◽  
Vol 9 (1) ◽  
pp. 52 ◽  
Author(s):  
Zhiwen Hu ◽  
Yulong Yang ◽  
Qibing Chang ◽  
Fengli Liu ◽  
Yongqing Wang ◽  
...  
Keyword(s):  
High Performance ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Ceramic Membranes ◽  
High Viscosity ◽  
Solid Content ◽  
Low Viscosity ◽  
Coating Method ◽  
One Step ◽  
Hole Defects

Hole defects and uneven membrane thicknesses can lead to poor performance, especially in the separation stability of ceramic membranes. This paper uses a one-step sintering method, which avoids hole defects and uneven membrane thicknesses, for the preparation of high-performance and defect-free ceramic membranes. For this purpose, two kinds of ceramic membrane slurry with high or low viscosities were prepared by alumina particles, as raw materials. Both the effects of the two coating process with a one-step coating method for low-viscosity slurry, and the two-step coating method with a high viscosity flush after a low viscosity coating, on the surface properties of a ceramic membrane, were studied in detail. The result shows that the properties of ceramic membranes can be improved by a two-step coating method, with a high viscosity flush after a low viscosity coating, A high-performance and defect-free ceramic membrane was obtained by one-step sintering at 1450 °C for 2 hr with 7 wt % solid content and a coating time of 11 s.

PREPARATION MICRO-FILTRATION CERAMIC MEMBRANE FROM NATURAL ZEOLITE FOR PROCION RED MX8B AND METHYLENE BLUE FILTRATION

2015 ◽  
Vol 11 (1) ◽  
pp. 8
Author(s):  
Dyah Choiriyah ◽  
Esfi Riandini ◽  
Arinta Wulandari
Keyword(s):  
Methylene Blue ◽  
High Pressure ◽  
Membrane Permeability ◽  
Compression Test ◽  
Natural Zeolite ◽  
Ceramic Membrane ◽  
Mechanical Test ◽  
Ceramic Membranes ◽  
Membrane Fabrication ◽  
Dry Conditions

<p>The study of ceramic membrane fabrication from natural zeolite and its utilization for filtration of <em>procion red MX8B</em> and methylene blue has been investigated. The purposes of this study are to determine the effect of pressure on membrane permeability and selectivity and utilize natural zeolite as ceramic membranes <em>procion red MX8B</em> and methylene blue filtration. The membrane was prepared by metide press pellets and then calcined at 850 <sup>o</sup>C. The membranes were characterized by mechanical test, flux and rejection of dye. The compression test of the membrane found the values of 1369.178 psi in dry conditions to 1388.933 psi in wet conditions. The flux test found that the higher the pressure applied, the flux was increase. However, the high pressure also decreased the selectivity. Rejection test found that the rejection of methylene blue filtration up to 70 %. Meanwhile, <em>procion red MX8B</em> filtration has rejectivity less than 20 %.</p>

scholarly journals Hydrodynamic and Performance Evaluation of a Porous Ceramic Membrane Module Used on the Water–Oil Separation Process: An Investigation by CFD

Membranes ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 121
Author(s):  
Guilherme L. Oliveira Neto ◽  
Nívea G. N. Oliveira ◽  
João M. P. Q. Delgado ◽  
Lucas P. C. Nascimento ◽  
Hortência L. F. Magalhães ◽  
...  
Keyword(s):  
Mass Flow Rate ◽  
Mass Flow ◽  
Flow Rate ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Particle Diameter ◽  
Transmembrane Pressure ◽  
Fluid Mixture ◽  
Oil Separation ◽  
Oil Concentration

Wastewater from the oil industry can be considered a dangerous contaminant for the environment and needs to be treated before disposal or re-use. Currently, membrane separation is one of the most used technologies for the treatment of produced water. Therefore, the present work aims to study the process of separating oily water in a module equipped with a ceramic membrane, based on the Eulerian–Eulerian approach and the Shear-Stress Transport (SST k-ω) turbulence model, using the Ansys Fluent® 15.0. The hydrodynamic behavior of the water/oil mixture in the filtration module was evaluated under different conditions of the mass flow rate of the fluid mixture and oil concentration at the entrance, the diameter of the oil particles, and membrane permeability and porosity. It was found that an increase in the feed mass flow rate from 0.5 to 1.5 kg/s significantly influenced transmembrane pressure, that varied from 33.00 to 221.32 kPa. Besides, it was observed that the particle diameter and porosity of the membranes did not influence the performance of the filtration module; it was also verified that increasing the permeability of the membranes, from 3 × 10−15 to 3 × 10−13 m2, caused transmembrane pressure reduction of 22.77%. The greater the average oil concentration at the permeate (from 0.021 to 0.037 kg/m3) and concentrate (from 1.00 to 1.154 kg/m3) outlets, the higher the average flow rate of oil at the permeate outlets. These results showed that the filter separator has good potential for water/oil separation.

scholarly journals PENURUNAN KADAR Fe DENGAN MEMBRAN KERAMIK PADA AIR SUMUR (Studi Kasus Pada Wilayah Kerja Puskesmas Putat Jaya Tahun 2018)

2019 ◽  
Vol 16 (3) ◽  
Author(s):  
Anggit Prameitya ◽  
Darjati . ◽  
Ernita Sari
Keyword(s):  
Ceramic Membrane ◽  
Membrane Filter ◽  
Ceramic Membranes ◽  
Appropriate Technology ◽  
Well Water ◽  
Membrane Thickness ◽  
Clean Water ◽  
Filter Media ◽  
Filtration Method ◽  
Before And After

Water is the element of life that is essential for survival. Along with the rapid growth of the human being, the demand for water increases. Now this, many water sources are contaminated, clean one of the impacts that cause pollution is that there is content of Fe in the water. Fe is the secondary contaminants that become problems in the provision of clean water is especially groundwater. The content of Fe exceeds quality raw processing must be done first before used to clean water. This research aims to analyze Fe levels before and after filtration is done using ceramic membrane media with a thickness of 5 cm and 7 cm in well water.This research is experimental research, using design research True Experiment with form One Group Pretest-Posttest. The object of this research that is well water containing Fe levels with a total of 32 Research sample sample. Further data obtained were analyzed using analytical test in Paired-Samples T Test.The results showed that the ceramic membrane filter media thickness 5 cm and 7 cm is capable of lowering the average rate of 8.11 Fe mg/l be 5.9 mg/l and 3.6 mg/l. The results of statistical tests using Paired T-test Test earned the result that there is a difference Fe levels before and after treatment using ceramic membrane filter media with variations in the thickness of 5 cm and 7 cm.The conclusion of this research is the ceramic membrane thickness 7 cm has the difference decreased most in lowering levels of Fe on well water. It is recommended to increase the creativity in applying appropriate technology in filtration method. Keywords: water well, levels of Fe, ceramic membranes

Separation Performance of Nanostructured Ceramic Membranes: Analytical Model Development

2018 ◽  
Vol 43 (3) ◽  
pp. 245-253 ◽  
Author(s):  
Mashallah Rezakazemi ◽  
Saeed Shirazian
Keyword(s):  
Analytical Model ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Model Development ◽  
Ceramic Membranes ◽  
Hydrogen Gas ◽  
Separation Performance ◽  
Diffusivity Coefficient ◽  
Predictive Tool ◽  
Nanostructured Ceramic

AbstractNanostructured ceramic membranes have shown considerable separation performance. In this work, an analytical model is developed to evaluate the separation performance of porous ceramic membranes in gas separation applications. The model takes into account three layers, i. e., (1) active layer, (2) interlayer, and (3) support layer. For estimation of sorption at the interface of feed stream and membrane, the partition coefficient model was used and the unsteady-state conservation of mass equation coupled to molecular models of the diffusivity coefficient was used to predict the permeation of penetrant hydrogen gas through a ceramic membrane. It was observed that the model can be readily applied to other systems of interest as a predictive tool.

Porous Ceramic Membranes in High Temperature Applications

1992 ◽  
Vol 61-62 ◽  
pp. 359-364 ◽  
Author(s):  
V.T. Zaspalis ◽  
K. Keizer ◽  
J.R.H. Ross ◽  
A.J. Burggraaf
Keyword(s):  
High Temperature ◽  
Porous Ceramic ◽  
Ceramic Membranes ◽  
Temperature Applications

scholarly journals Fabrication of Ceramic Membrane Chromatography for Biologics Purification

1970 ◽  
Vol 12 (4) ◽  
Author(s):  
Maizirwan Mel ◽  
Fouad R.H. Abdeen ◽  
And Iis Sopyan
Keyword(s):  
Ceramic Membrane ◽  
Compaction Pressure ◽  
Porous Ceramic ◽  
Separation Processes ◽  
Metal Affinity ◽  
Membrane Chromatography ◽  
Membrane Fabrication ◽  
The Subject ◽  
Adsorptive Membrane ◽  
Porous Ceramic Membrane

Chromatography is one of the most important separation processes of choice for the recovery/purification of proteins and complex bio-structures. Fabrication of chromatographic membranes and their efficiency in the chromatography process has been the subject of many recent researches. In this study, a coin-like, 13 mm diameter and 3 mm thick, ceramic membrane was fabricated to be used as a chromatographic medium. The membrane is used to replace the conventional resin-based chromatography columns. Hydroxyapatite (HA) powder was used as a material for the membrane fabrication. In this project, a HA powder was produced using starch as pore creating agents. Characterization processes were done for the ceramic membrane using the suitable apparatuses. Three parameters of the fabrication process (starch wt %, compaction pressure and sintering temperature) were manipulated to optimize the performance of the membrane. The fabricated membrane was placed in a (FPLC) system to be tested for its performance as an adsorptive membrane. (IMAC) process was run by immobilizing Ni2+ ions at the membrane particles surfaces. NP protein of the (NDV) was used to test the membrane's ability to bind Histidine-tagged proteins. The optimum set of process parameters that yielded in the highest porosity and good chromatogram was determined to be 5 wt % starch, 3000 psi compaction pressure and 1100°C sintering temperature.ABSTRAK: Kromatografi merupakan satu daripada proses pengasingan yang penting yang dipilih untuk perolehan/penapisan protein dan biostruktur yang kompleks. Pemfabrikatan membran kromatografi dan kecekapannya dalam proses kromatografi merupakan fokus beberapa kajian terkini. Dalam kajian ini, membran seramik berbentuk duit syiling, berdiameter 13 mm dengan ketebalan 3 mm, direka untuk digunakan sebagai perantara kromatografi. Membran ini digunakan untuk menggantikan turus kromatografi berasaskan resin yang lazim. Serbuk hidroksiapatit (HA) digunakan sebagai bahan pemfabrikatan membran. Dalam projek ini, serbuk HA dihasilkan menggunakan kanji sebagai agen penghasilan liang. Proses pencirian dilakukan terhadap membran seramik menggunakan radas yang sesuai. Tiga parameter proses pemfabrikatan (peratusan berat kanji, tekanan padatan dan suhu pensinteran) dimanipulasikan untuk mendapatkan prestasi membran yang optima. Membran yang difabrikatkan diletakkan dalam sistem FPLC (Fast Protein Liquid Chromatography) untuk diuji prestasinya sebagai membran serap. Proses IMAC (Immobilized Metal Affinity Chromatography) dijalankan dengan memegunkan ion Ni2+ pada permukaan zarah membran. Nucleoprotein dari NDV (Newcastle disease virus) digunakan untuk menguji kebolehan membran terikat dengan protein yang dilabelkan dengan Hisditina. Set parameter proses yang optima yang menghasilkan keliangan tertinggi dan kromatogram yang baik ditentukan pada berat kanji 5 %, tekanan padatan 3000 psi dan suhu pensinteran 1100°C.KEYWORDS: Membrane Chromatography, Porous Ceramic Membrane, IMAC, Hydroxyapatite, Chromatography.

A porous ceramic membrane tailored high-temperature supercapacitor

2018 ◽  
Vol 379 ◽  
pp. 60-67 ◽  
Author(s):  
Xin Zhang ◽  
Benlin He ◽  
Yuanyuan Zhao ◽  
Qunwei Tang
Keyword(s):  
High Temperature ◽  
Ceramic Membrane ◽  
Porous Ceramic ◽  
Porous Ceramic Membrane

Ceramac®-19 demonstration plant ceramic microfiltration at Choa Chu Kang Waterworks

2012 ◽  
Vol 7 (4) ◽  
Author(s):  
Gilbert Galjaard ◽  
Jonathan Clement ◽  
Wui Seng Ang ◽  
Mong Hoo Lim
Keyword(s):  
Stainless Steel ◽  
Ceramic Membrane ◽  
Membrane System ◽  
Ceramic Membranes ◽  
Operational Performance ◽  
Transmembrane Pressure ◽  
Membrane Systems ◽  
Steel Vessel ◽  
Stainless Steel Vessel ◽  
Demonstration Plant

Ceramic membrane technology is used in water treatment due to the robustness of ceramic membranes, but ceramic membrane systems are costly as each membrane module is housed in individual casing. PWNT has developed a ceramic membrane system called the CeraMac which greatly reduced the capital cost of installing the system by housing up to 200 modules in a single stainless steel vessel. PWNT and PUB have jointly started a 18-month operation at Choa Chu Kang Waterworks (CCKWW). In this paper, the results of the optimization runs using settled water as feed has shown that membrane operation at flux of 200 lmh can be sustained with stable transmembrane pressure (TMP) and permeability, and the proposal to apply 0.5 mg/L residual ozone to the feed to investigate the effect of ozonated feed on membrane operational performance and fouling will be discussed.

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