Fly Ash, from Recycling to Potential Raw Material for Mesoporous Silica Synthesis
National Research and Development Institute for Cryogenics and Isotopic Technologies-ICSI Ramnicu Valcea, 4th Uzinei Street, 240050 Ramnicu Valcea, Romania
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Nanomaterials 2020, 10(3), 474; https://doi.org/10.3390/nano10030474
Received: 17 February 2020
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Revised: 28 February 2020
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Accepted: 29 February 2020
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Published: 5 March 2020
(This article belongs to the Special Issue Synthesis, Processing and Application of Micro and Nanostructured Materials)
In order to meet the increasing energy demand and to decrease the dependency on coal, environmentally friendly methods for fly ash utilization are required. In this respect, the priority is to identify the fly ash properties and to consider its potential as raw material in the obtaining of high-value materials. The physico-chemical and structural characteristics of the fly ash coming from various worldwide power plants are briefly presented. The fly ash was sampled from power plants where the combustion of lignite and hard coal in pulverized-fuel boilers (PC) and circulating fluidized bed (CFB) boilers was applied. The fly ash has high silica content. Due to this, the fly ash can be considered a potential raw material for the synthesis of nanoporous materials, such as zeolites or mesoporous silica. The samples with the highest content of SiO2 can be used to obtain mesoporous silica materials, such as MCM-41 or SBA-15. The resulting mesoporous silica can be used for removing/capture of CO2 from emissions or for wastewater treatment. The synthesis of various porous materials using wastes would allow a high level of recycling for a sustainable society with low environmental impact.
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Keywords:
coal combustion; fly ash; mesoporous silica; recycling
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MDPI and ACS Style
Miricioiu, M.G.; Niculescu, V.-C. Fly Ash, from Recycling to Potential Raw Material for Mesoporous Silica Synthesis. Nanomaterials 2020, 10, 474. https://doi.org/10.3390/nano10030474
AMA Style
Miricioiu MG, Niculescu V-C. Fly Ash, from Recycling to Potential Raw Material for Mesoporous Silica Synthesis. Nanomaterials. 2020; 10(3):474. https://doi.org/10.3390/nano10030474
Chicago/Turabian StyleMiricioiu, Marius G., and Violeta-Carolina Niculescu. 2020. "Fly Ash, from Recycling to Potential Raw Material for Mesoporous Silica Synthesis" Nanomaterials 10, no. 3: 474. https://doi.org/10.3390/nano10030474
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