An efficient method for recycling spent residue cat-cracking catalysts (SRC) to prepare broadly-applicable mullite-based wear-resistant ceramics

Mohammadi, Azadeh; Salehi, Ehsan; Aghazadeh, Hadiseh; Ramezani, A.; Eidi, Babak

doi:10.1016/j.clay.2020.105488

Cited by 7 publications

(4 citation statements)

References 31 publications

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“…The bending strength of support was about 20 Mpa reported by the references, 18–21 so 4 % was selected as the optimal content of pore forming agent content. The optimal bending strength, porosity, pore size, and water flux of support were respectively 22 Mpa, 37 %, 665 nm and 2800 L/h·m 2 ·MPa under this condition.…”

Section: Resultsmentioning

confidence: 97%

“…However, the massive holes were likely to be connected with each other and then formed bigger holes. The structure of support was loosed by the bigger holes, so the bending strength of support decreased 18–21 …”

Section: Resultsmentioning

confidence: 99%

“…The structure of support was loosed by the bigger holes, so the bending strength of support decreased. [18][19][20][21] As can be concluded from Figure 6 that the pore size of support increased from 320 to 865 nm with the increasing pore forming agent content. The pore forming agent particles bonded together mutually with the increasing pore forming agent content.…”

Section: The Influence Of Addition Amount Of Pore Forming Agent On Th...mentioning

confidence: 99%

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Study on the preparation of ceramic membrane support and its Fe migration rule by high‐aluminum fly ash as raw material

Zhang,

Liu

et al. 2023

Int J Applied Ceramic Tech

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In order to reduce the cost of ceramic membrane support, ceramic membrane support was prepared using high‐aluminum fly ash as raw material, and its Fe migration rules during the preparation process are studied. The effects of sintering temperature, pore forming agent content, and binder content on the properties of support, such as porosity, pore size, bending strength and water flux have been investigated. The optimum contents of high‐aluminum fly ash, pore forming agent and binder in the ceramic membrane support are 95%, 4%, and 1% respectively, and its sintering temperature is 1300°C. The porosity, bending strength, pore size, and water flux of the prepared support are 37%, 22 MPa, 665 nm, and 2800 L/h·m2·MPa, respectively. X‐ray powder diffractometer, X‐ray fluorescence spectrometer, X‐ray photoelectron spectrometer, inductively coupled plasma spectrometer, transmission electron microscope, spherical aberration corrected transmission electron microscopy, and laser Raman spectroscopy were used to characterize the support and Fe existing morphology in it. The results show that the main phases of sintered support are mullite, corundum, and silica. Massive mullite is produced when the sintering temperature reaches 1200°C. The content of mullite increases with increasing sintering temperature. About 7.7 % content of total Fe in the support exists in the form of Fe2O3. About 92.3% content of total Fe is dissolved into mullite. Fe is evenly distributed in mullite, and it is enriched at the grain boundary by element segregation. Fe in mullite is difficult to dissolve under strong acid conditions, so its stability is very strong.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: The Influence Of Addition Amount Of Pore Forming Agent On Th...mentioning

confidence: 99%

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Study on the preparation of ceramic membrane support and its Fe migration rule by high‐aluminum fly ash as raw material

Zhang,

Liu

et al. 2023

Int J Applied Ceramic Tech

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“…For both reasons, during the two last decades, research efforts have been conducted to study the synthesis of mullite from less common and low cost raw materials such as inorganic waste from different sources and characteristics. Thus, waste from the agro-food industry (rice husk ash) [65,66], spent cracking catalysts [67][68][69], aluminum buffing dust [70], aluminum sludge generated in water treatment plants [71], ceramic wastes from the manufacture of ceramic tiles [72] or fly ash [73,74], among others have been investigated as raw materials for the synthesis of mullite.…”

Section: Introductionmentioning

confidence: 99%

Mullite-Based Ceramics from Mining Waste: A Review

et al. 2021

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Mullite (3Al2O3·2SiO2) is an aluminosilicate characterized by excellent physical properties, which makes it an important ceramic material. In this way, ceramics based on mullite find applications in different technological fields as refractory material (metallurgy, glass, ceramics, etc.), matrix in composite materials for high temperature applications, substrate in multilayer packaging, protective coatings, components of turbine engines, windows transparent to infrared radiation, etc. However, mullite is scarce in nature so it has to be manufactured through different synthesis methods, such as sintering, melting-crystallization or through a sol-gel route. Commonly, mullite is fabricated from pure technical grade raw materials, making the manufacturing process expensive. An alternative to lowering the cost is the use of mining waste as silica (SiO2) and alumina (Al2O3) feedstock, which are the necessary chemical compounds required to manufacture mullite ceramics. In addition to the economic benefits, the use of mining waste brings out environmental benefits as it prevents the over-exploitation of natural resources and reduces the volume of mining waste that needs to be managed. This article reviews the scientific studies carried out in order to use waste (steriles and tailings) generated in mining activities for the manufacture of clay-based ceramic materials containing mullite as a main crystalline phase.

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Bio-Based Polyurethane Foams with Enriched Surfaces of Petroleum Catalyst Residues as Adsorbents of Organic Pollutants in Aqueous Solutions

et al. 2020

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An efficient method for recycling spent residue cat-cracking catalysts (SRC) to prepare broadly-applicable mullite-based wear-resistant ceramics

Cited by 7 publications

References 31 publications

Study on the preparation of ceramic membrane support and its Fe migration rule by high‐aluminum fly ash as raw material

Study on the preparation of ceramic membrane support and its Fe migration rule by high‐aluminum fly ash as raw material

Mullite-Based Ceramics from Mining Waste: A Review

Bio-Based Polyurethane Foams with Enriched Surfaces of Petroleum Catalyst Residues as Adsorbents of Organic Pollutants in Aqueous Solutions

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