Hierarchical porous zeolite synthesis from coal fly ash via microwave heating

Murakami, Tatsuhiko; Otsuka, Kohei; Fukasawa, Tomonori; Ishigami, Toru; Fukui, Kiichi

doi:10.1016/j.colsurfa.2023.130941

Cited by 11 publications

(3 citation statements)

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“…There are many synthetic methods, which vary depending on the temperature and time of the process (hours/days), environment, Si to Al ratio, reaction components ratio, process steps, etc. The most commonly used and well-known methods for the synthesis of zeolite materials are hydrothermal synthesis, the molten salt method, alkaline activation, microwave synthesis [97,98], and ultrasonic treatment [99]. Hydrothermal crystallization consists of three stages of synthesis: dissolution, condensation, and crystallization in an alkaline solution with a pH > 8.5.…”

Section: Methods Of Synthesis For Fa-derived Zeolitesmentioning

confidence: 99%

“…When the diffusion of ions and molecules to an active site is limited, the internal surface area of a zeolite remains empty, leading to reduced zeolite activity. However, this challenge can be addressed by synthesizing hierarchical zeolites that possess enhanced diffusion capabilities [99]. This approach combines the benefits of shape selectivity from the microporous framework with the facilitated mass transfer achieved through the mesoporous channels [113].…”

Section: Methods Of Synthesis For Fa-derived Zeolitesmentioning

confidence: 99%

“…However, these methods are expensive due to their multi-step processes involving templates and acid-base treatment after synthesis. Alternatively, hierarchical zeolites can be synthesized in a cost-effective and straightforward manner using the microwave heating method [99].…”

Section: Methods Of Synthesis For Fa-derived Zeolitesmentioning

confidence: 99%

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Recent Findings on Fly Ash-Derived Zeolites Synthesis and Utilization According to the Circular Economy Concept

Mlonka-Mędrala

2023

Energies

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The synthesis and utilization of zeolites derived from fly ash (FA) gained significant attention years ago due to their potential to address environmental challenges and promote sustainable practices subscribing to the circular economy concept. This paper highlights the recent findings regarding the synthesis and utilization of zeolites derived from FA. It begins with a discussion about the recent challenges regarding industrial waste management and statistics regarding its availability on the global market with a special insight into the situation in Poland. The characteristics of FA obtained from various fuels were presented and the main differences were highlighted. Then, different methods used for the synthesis of zeolites from FA were discussed in small and pilot scales taking into consideration the main challenges and problems. The analytical methods used in porous materials synthesis verification and properties determination were described. The sorption properties of FA-derived zeolites were presented and discussed. Finally, the paper emphasizes the potential applications of fly ash-derived zeolites in different fields. Their importance as sustainable alternatives to conventional materials in industry, construction, agriculture, power, medicine, and other industrial sectors was analyzed.

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Section: Methods Of Synthesis For Fa-derived Zeolitesmentioning

confidence: 99%

Section: Methods Of Synthesis For Fa-derived Zeolitesmentioning

confidence: 99%