Potentials of fabricating porous ceramic bodies from kaolin for catalytic substrate applications

Obada, David O.; Dodoo‐Arhin, David; Dauda, Mohammed; Anafi, Fatai O.; Ahmed, Abdulkarim S.; Ajayi, O.A.

doi:10.1016/j.clay.2016.06.006

Cited by 36 publications

(8 citation statements)

References 56 publications

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“…The highest content is component of Si and the lowest is U. Table1 show the contents of Si, Al, Fe, K, Mg, the Plered powder can be classified as kaolin clay [8,9]. These composition of Plered powder can affect the temperature heating during sintering process especially the component of Al, Si and Fe content [1,4,9]. The higher of Al can increase the temperature sintering to get the strength of Plered substrate [9].…”

Section: Resultsmentioning

confidence: 99%

“…The sintering temperature of 1250 ο C with soaking time of 1 hr are capable to increase the strength of the green compact. The diffusion process of the inter ceramic powder occured during sintering process [4]. The temperature sintering of 1250 C can be used as reference of the plered ceramic process.…”

Section: Resultsmentioning

confidence: 99%

“…Plered is famous as ceramic product especially ceramic tiles, decorative ceramics, tableware and roof tiles [1]. Currently, the function of ceramic plered can be used for engineriing material such as ceramic filter, thermal barier materials and catalytic materials [2][3][4]. Fabrication of porous ceramic can be done by using compaction process and continued by sintering process [3].…”

Section: Introductionmentioning

confidence: 99%

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Porosity Control and Mechanical Properties of Porous Ceramic Material from Plered Region

Sulistyo

Rizky²

2018

MATEC Web of Conferences

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Plered region is located in around Purwakarta area, west java, Indonesia. Plered is famous as ceramic product especially ceramic tiles, decorative ceramics, tableware and roof tiles. This paper investigated the manufacturing of porous ceramic from Plered and evaluated the mechanical properties especially bending strength. The investigation include the controlling of porosity using pore former during manufacturing, investigation of chemical composition and evaluated the fracture strength using bending test. Evaluation of porosity ceramic product use an archimedes method and scanning electron microscopy and the bending strength of porous ceramic using three point bending test. The porous ceramic was tailored by using compaction process and sintering process at temperature of 1250 C, the pore former (rice starch) was added on the material ceramic to control of porosity. The bending strength use standard ASTM C1161-13 which sample has cross section of 6x8 mm2 and 90 mm long. The results show that the porosity increases with the number of pore formers in a mixture of clay, the porosity of sinter ceramic was 7 vol%,12 vol%, 17 vol% at using pore former 5 wt%, 15 wt% and 25 wt % respectively. The bending strength of sinter ceramic was declined with increasing porosity. The bending strength of sintered ceramic was 58 MPa, 49.5 MPa and 34.7 MPa at porosity of 7 vol%, 9 vol% and 14 vol% respectively.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Porosity Control and Mechanical Properties of Porous Ceramic Material from Plered Region

Sulistyo

Rizky²

2018

MATEC Web of Conferences

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“…Mullite is one of the most important refractory ceramics, because of its unique combination of properties: high melting point (~ 1800ºC), excellent mechanical and thermal shock resistance, chemical stability, low thermal expansion coefficient, low thermal conductivity at high temperatures, low dielectric constant, and its ability to act as an electrical insulator, making it potentially useful in various applications from refractories to electronic substrates 3,[6][7][8][9][10][11][12][13] .…”

Section: Introductionmentioning

confidence: 99%

Refractory Ceramics of Clay and Alumina Waste

et al. 2021

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Refractory ceramics were produced from clays and alumina waste. Specimens were shaped by uniaxial pressing, subjected to thermal analysis by dilatometry and heat-treated in a conventional furnace at 1300 and 1400ºC, applying a heating rate of 5ºC/min and a dwell time of 2 and 3 hours at the maximum temperature. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and physicomechanical properties. The dilatometric analysis before heat treatment indicated that the formulation containing the largest amount of fluxing oxides presented the highest linear shrinkage. The XRD analysis revealed that mullite was the major phase and needle shaped crystals typical of mullite obtained from clay minerals were observed by SEM. The increase in firing temperature and dwell time at the maximum temperature improved the physicomechanical properties of the specimens. The thermal expansion coefficient (TEC) in the range of 25 to 1000ºC varied from 6.2 to 6.9 x 10 -6°C-1 .

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“…Kaolin is also inexpensive, offering cost savings for upscaled production of NZVI. Above all, kaolin is effective not only as a supporter of NZVI, but is also itself an efficient adsorbent [17][18][19][20][21][22]. Kaolin is widely used as a porous material to adsorb pollutants from contaminated water and is thus an ideal support material for NZVI [23].…”

Section: Introductionmentioning

confidence: 99%

Kaolin Modified Nano Zero Valent Iron Synthesis via Box-Behnken Design Optimization

et al. 2017

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Nano zero valent iron (NZVI) has been extensively studied for its application to treat pollutants, particularly in contaminated water. This research studies enhancement of the reducing power of NZVI using kaolin as a supporter and ethanol as a medium. Kaolin modified nano zero valent iron (K-NZVI) was synthesized under three different parameters including ethanol content (0-100 v%), ratio of kaolin to NZVI (0-1.5), and dropping rate of NaBH4 (4-10 mL/min). The Box-Behnken Design was used to design the experimental conditions, and Reactive Red 120 was used as an organic pollutant probe to quantify the reducing power of the synthesized K-NZVI. The results revealed that the highest reduction potential of K-NZVI was found under the following conditions: ethanol content of 100 v%, kaolin to NZVI ratio of 0.75, and NaBH4 dropping rate of 7 mL/min. Based on these optimal synthesized conditions, the smaller crystal size of NZVI as measured from X-ray diffraction peaks, led to more efficient reduction of RR120. Images from scanning electron microscopy revealed that Fe was distributed uniformly over the surface, while the particles found in synthesized K-NZVI were mainly iron (Fe) and oxygen (O).

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Potentials of fabricating porous ceramic bodies from kaolin for catalytic substrate applications

Cited by 36 publications

References 56 publications

Porosity Control and Mechanical Properties of Porous Ceramic Material from Plered Region

Porosity Control and Mechanical Properties of Porous Ceramic Material from Plered Region

Refractory Ceramics of Clay and Alumina Waste

Kaolin Modified Nano Zero Valent Iron Synthesis via Box-Behnken Design Optimization

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