Preparation of geopolymer-based porous filter using the quartz sand compact method
| Autor: | Meng-xue Xu, Xin-long Chen, Zheng-wei Zhang, Yan He, Xuemin Cui |
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| Rok vydání: | 2020 |
| Předmět: |
Chemical resistance
Materials science Mechanical Engineering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Geopolymer Compressive strength Surface-area-to-volume ratio Mechanics of Materials Slurry General Materials Science Particle size Composite material 0210 nano-technology Porosity Quartz |
| Zdroj: | Journal of Porous Materials. 27:863-874 |
| ISSN: | 1573-4854 1380-2224 |
| Popis: | With the increasing of high temperature oil wells and steam ones, the traditional sands control filter cannot be used in those wells. Therefore, based on the conditions, using particle compact method, round quartz sands with a certain particle size and an inorganic polymer (geopolymer) material with good heat resistance is selected to prepare a heat-resistant filter with suitable pore diameter. By adjusting the contents of water-glass, water, sand and thickening agent of the geopolymer-based sand control filters, open space structure is built by low-cost geopolymer slurry and sand. When the size of quartz sand is mainly of 450–600 µm, and the volume ratio of quartz sand to slurry is 4.3:1, the compressive strength and permeability of this sand control filter reach 10.33 MPa and 18 D, respectively. Thermal gravimetry and calcination experiments show heat-resistance up to 736 °C. Scanning electron microscopy shows that the sand particles are wrapped by the geopolymer slurry and that pore sizes of 170–210 µm are present between the particles. Mercury intrusion porosimetry measurement finds the pore size distribution to be close to 150–280 µm. Measurement of sand retaining precision indicates that the filter can intercept particles larger than 45 µm and allow clay particles to pass through. Deformation measurements confirm no significant deformation occurred for up to 210 days and durability of the filter. In measurement of chemical resistance, the compressive strength decreases in the acid solution, and no significant changes in the compressive strength are observed in air, water, diesel oil and salt solutions. Therefore, compared to the approach of improving the heat-resistance of a resin sand control filter, the use of the geopolymer-based sand control filter should be a better choice in many cases due to its heat resistance, ease of preparation and minor deformation. |
| Databáze: | OpenAIRE |
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