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EC number: 300-212-6 | CAS number: 93924-19-7 Hollow ceramic spheres formed as a part of the ash in power stations burning pulverized coal. Composed primarily of the oxides of aluminium, iron and silicon and contain carbon dioxide and nitrogen within the sphere.
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The composition, physical and chemical properties of cenospheres, fly ash, alumo silicate are variable. This arises principally from the raw materials and from the combustion and abatement technologies used. The process of burning coal in thermal power plants produces fly ash and the cenospheres. Cenospheres are lightweight, inert, hollow spheres filled with inert air or gas, typically produced as a by-product of this coal combustion. Based on the chemical nature of cenospheres, neither photo- or chemical degradation, nor biodegradation (due the absence of carbon atoms within the molecule) is expected. Therefore, degradation is considered negligible.
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