Carbonation of Alkaline Waste as a CO2 Utilization Treatment to Obtain Products with Improved Technical and Environmental Properties
Alkaline residues are produced in large amounts by several types of processes, such as coal power plants, cement kilns, steel manufacturing plants and solid waste incineration plants. Among the different types of treatments that may applied to allow their use for different applications, accelerated carbonation is of particular interest. The products obtained with this treatment - that can be seen both as a CO2 storage and utilization strategy - may in part replace raw materials and associated CO2 emissions, contributing to reduce the environmental footprint of the construction industry. To reach this goal it is essential that these products present analogous (if not improved) technical properties with regard to the construction materials they replace. In addition, as industrial residues may also contain elements of potential environmental concern, the leaching behaviour of products manufactured from these materials must be carefully evaluated. Depending on the characteristics of the residues and the desired product, different treatment routes and operating conditions may be applied. In this webinar, the results achieved applying three different carbonation routes for the valorization of alkaline solid residues deriving from different thermal processes will be presented.
Bio
Giulia Costa is an associate professor at the Department of Civil Engineering and Computer Science Engineering of the University of Rome Tor Vergata. Her research activities focus on the valorization of waste treatment and industrial residues with specific regard to their leaching behaviour through different types of treatments, CCUS by carbonation of alkaline residues and life cycle analysis applied especially to waste management systems.