Objectives

The main purpose of the project is to identify and test innovative methods for the management of coal or lignite by-products that derive from its combustion. The main by-product that this proposal is targeting is fly ash. The idea behind this proposal is to find a way to both mitigate the CO₂ emissions coming out from a power plant and manage the fly ash, as it is no easily disposed of. Moreover, it is also a way to minimise the costs from the transportation of the CO₂ to the storage site since the carbon capture is made at the coal combustion sites.As mentioned, the final carbonated fly ash product is much safer for disposal and also has the potential for re-use as a construction material or additive due to the improvements in physical structure, mechanical strength and leaching resistance.

Moreover, the synthesis of zeolites, using coal fly ash, will be studied in order to be used as sorbents for capturing the carbon dioxide.

The proposed project will focus, mainly, on the following objectives:

• Identification of the different types of coal fly ashes of the partners involved, selection of the samples and characterisation of them.
• Identification of the processes used for the carbonation of the fly ash and zeolites, and selection the best that suits the project.
• Design and set up of the experimental conditions.
• Selection of the most promising samples of fly ash based on the chemical composition.
• Laboratory testing of CO₂ capture of fly ash and zeolite samples at various conditions.
• Testing of the most promising samples in real industrial conditions on pilot plant testing unit in the power station.
• Run of the experiments in different conditions in order to produce safe results.
• Identification of ways for the environmental management of the carbonation products and use of them for the restoration of the coal mine.
• Cost - benefit analysis of the technologies studied

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