Cement industries are the world’s largest sources of greenhouse gas CO2that is released during limestone dissociation. Taking into account the need to remove CO2 from the atmosphere as well as the recent achievements of nanotechnology, the ANTHRAKOKIPOS proposal aims to develop experimental processes and technology to convert CO2 of cement plants into useful solid nanocarbons(graphene, CNTs) and simultaneously to apply them inmanufacturing of composite products with improved properties.
The partnership involves a research institute, NCSR Demokritos, and two large cement and resin manufacturers, TITAN S.A. and MEGARA RESINS S.A., correspondingly.
The scientific objectives of the program can be summarized as follows:
(1) CO2 conversion into high-value added nanocarbons(graphene, nanotubes, nanofibers, etc.) on a laboratory scaleat NCSR Demokritosthrough CO2 reduction processes using molten metals and/or metal salts, and
(2) optimization of nanocarbon production methods.
The technological and production objectives of the proposal are:
(1) pilot production of nanocarbonsat the premises of TITAN,
(2) incorporation of the produced nanocarbons into cement products of TITAN and into resin productsof MEGARA RESINSto enhance their mechanical properties.
The main research activity will be developed at NCSR Demokritos that will concern the design and construction of two devices based on chemical transformation of CO2 tonanocarbons with controlled morphology and properties. The first metallothermicinstallationis based ontreatment of alkali metals (Mg, Ca) in a reducing atmosphere containing CO2 that leads to production of sheet-likenanocarbons in the form of graphenes. The second installation employs electrolysis of molten carbonates (e.g. Li2CO3, etc.) at low electric voltage(~ 2V) that leads to reduction of CO2 dissolved in the melt to carbon nanowires and nanotubesaccompanied by simultaneous release of O2. The most efficient nanocarbon production process will be developed on a pilot scale at TITAN’s facilities.Nanocarbons produced on the laboratory/pilot scale will be introduced into TITAN’s and MEGARA RESINS’s products that will have the “green carbon footprint”.