Conférence Renato Baciocchi
Tous sont invités à la présentation de Renato Baciocchi, Professeur associé à l'université de Rome Tor Vergata.
La présentation se déroulera salle 2422 à 12h le jeudi 28 avril 2016.
La présentation se déroulera en Anglais! Entrée libre!
Wet-route carbonation of industrial residues: fundamentals, energy requirements and scale-up opportunities
Injection in deep geological formations is considered as the most promising option for CO2 storage. Limitation of the available storage capacity with acceptable leaking rates may limit its application, at least in some geographical locations, thus prompting the need for developing alternative storage options. Among these, accelerated carbonation has been proposed as an effective way for carbon dioxide sequestration. This process mimics natural weathering, where CO2 reacts exothermically with alkaline elements present in natural metal-oxide bearing material, forming thermodynamically stable and benign carbonates. A valuable source of alkalinity for the carbonation process is represented by alkaline industrial residues produced by different industrial activities such as steelmaking, cement production, waste incineration and coal combustion. These residues are typically more reactive than minerals and are often available at CO2 point source emissions.
This presentation will give an overview on the research activities carried out by our group in this field, which was mostly performed on the so called “wet” or “thin-film” route, operated adopting a liquid to solid ratio below 1 l/kg. The results obtained through lab-scale tests performed on different types of industrial residues will be first presented, making reference specifically to EAF, AOD and BOF steel slags. Based on these results, the energy requirements of the wet route carbonation will be presented, discussed and compared with those of the more traditional slurry-phase route, allowing to identify the critical steps of the overall process route.
Finally, scale-up opportunities of the wet-route carbonation, based on a combined carbonation-granulation process, will be discussed. The aim of this combined process is to obtain artificial aggregates suitable for use in civil engineering applications, thus potentially reducing the consumption of abiotic natural resources and reducing the need for disposal of the residues. The results obtained in a lab-scale granulator and more recently in a pilot-scale rotary reactor, in terms of CO2 uptake, environmental and mechanical properties of the obtained granules, will be presented.
Renato Baciocchi is Associate Professor of Environmental Engineering at the University of Rome Tor Vergata since 2003. He received a Ph.D. in Chemical Engineering by the Politecnico di Milano in 1995 and worked for a few years as process engineer before starting his academic career at the end of 1998. His main research interests focus on the management of contaminated sites and on carbonation of minerals and industrial residues, with the most recent works focusing on the combination with biogas upgrading and granulation processes. He has published more than 200 contributions to international journals and conference proceedings, with about 70 papers published in peer review journals.
