Macro-porous ceramic supports for membranes prepared from quartz sand and calcite mixtures |
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| Affiliation: | 1. Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou 570228, China;2. College of Physics and Electronic Information, Tianjin Normal University, Tianjin 300387, China;3. State Key Laboratory of New Ceramics & Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;1. Department of Mechanical Engineering, Ahmadu Bello University, Zaria, Nigeria;2. Department of Materials Science and Engineering, University of Ghana, Legon, Ghana;3. Department of Chemical Engineering, Ahmadu Bello University, Zaria, Nigeria;4. Institute of Applied Science and Technology, University of Ghana, Legon, Ghana |
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| Abstract: | A new type of porous ceramic supports for membranes has been designed. The new supports have been fabricated from polycrystalline quartz sand and calcite raw materials. In this work, two configurations of support (tubular and flat) have been produced using extrusion method. The open porosity, the pore size distribution, the average pore size (APS), the strength and the permeability of sintered supports have been found to depend mainly on the weight ratio of calcite (CaCO3) additive. The results showed that with the addition of 15–35 wt.% of calcite and sintering temperature of about 1375 °C for 1 h the best characteristics of sintered supports could be obtained. The developed tubular ceramic supports with the APS 6.3–12 μm, open porosity 42–55%, the water permeability (16–68 m3/h m2 bar) and flexural strength 8–18 MPa hopefully offer many perspectives for a wide use in membranes technology. |
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| Keywords: | Ceramic supports Quartz Calcite Water permeability Porous materials |
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