Solvent-free synthesis of FAU zeolite from coal fly ash

Liu, Pei; Wu, Qinming; Yan, K.; Wang, Liang; Xiao, Feng‐Shou

doi:10.1039/d2dt03196e

Cited by 16 publications

(2 citation statements)

References 53 publications

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“…Fly ash contains a variety of elements such as silicon and aluminum required for the synthesis of zeolite, if the use of y ash to prepare zeolite, not only can save chemical raw materials, there are advantages such as low preparation costs. In summary, the preparation of zeolite adsorbent materials using y ash, so that it can be applied to reduce the ammonia nitrogen content of wastewater, is a highly e cient, inexpensive and environmentally friendly method, but also for the treatment of y ash provides a new way of thinking, so that it achieves the purpose of "waste for waste, green chemistry" [23].…”

Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of Fly Ash-Based Zeolite X/A for Ammonia- Nitrogen Removal

Yan,

Wu,

et al. 2024

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Fly ash is a kind of industrial solid waste, which mainly comes from thermal power plants using coal as power fuel. The lack of effective disposal and utilization of fly ash has led to its not only destroying and polluting the ecological environment but also seriously endangering human health. In addition, the treatment of ammonia nitrogen wastewater is an important issue in environmental pollution control, so the study of efficient and low-cost separation materials has become a challenging topic. This study utilises the hydrothermal method to convert fly ash into fly ash-based zeolite, which is capable of treating ammonia nitrogen wastewater. The successful synthesis of Zeolite X, zeolite A and zeolite A-X are confirmed through various characterisation techniques, including XRD, TG-DSC, TEM, BET, and FT-IR. Simultaneously, the synthesized zeolite is tested for its capacity to adsorb and regenerate ammonia nitrogen wastewater. The pure zeolite with the largest adsorption capacity, simpler preparation process, good stability, and high regeneration capacity is selected.

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Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of Fly Ash-Based Zeolite X/A for Ammonia- Nitrogen Removal

Yan,

Wu,

et al. 2024

Preprint

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“…In addition, large amount of water in hydrothermal system not only produce lots of waste liquid, but the dissolution of Si-and Al-nutrients in solvent lead to the loss of zeolite product yield. Therefore, the development of sustainable economic and green synthesis routes without organic template and solvent for important zeolites is of significance and much-anticipated [24][25][26][27][28][29].…”

mentioning

confidence: 99%

Sustainable synthesis of MFI zeolite and derived metal-acid bifunctional catalysts for hydroisomerization of n-heptane

Zhu,

Xu,

Wang

et al. 2024

Preprint

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Developing sustainable synthesis method of versatile zeolites to overcome the shortcoming of traditional process is of significant for development of green chemistry and environmentally friendly techniques. In this work, MFI zeolite (ZSM-5) was synthesized through organotemplate-, solvent- and seed-free quasi-solid state transformation with commercial silica gel or Stöber colloidal SiO2 as silica source. The key influencing factors to this sustainable synthesis process, such as starting material composition, crystallization temperature and time, had been unambiguously investigated by combining a series of characterization techniques and the optimized synthesis conditions had been obtained. In addition, this green synthesis method can be extended into the fabrication of encapsulated metal-zeolite bifunctional catalyst, which is effective in hydroisomerization of n-heptane. These results are instructive for development of sustainable synthesis of aluminosilicate zeolites and derived heterogeneous catalysts.

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