The main aims of this work were to assess the CO2storage capacity of different particlesize fractions of stainlesssteelslag subjected to accelerated carbonation under mild operating conditions, to study the influence on reaction kinetics of some of the main operating parameters (temperature, pressure and liquid to solid ratio) and to determine the effects of the process on slag mineralogy and leaching behavior. Maximum CO2 uptakes of 130 g CO2/kg residues were measured for the finest grain size and decreased with particlesize owing to differences in reacting species availability and specific surface. Process kinetics proved relatively fast, achieving completion in around 2 hours with a CO2 pressure of 3 bar and an optimal liquid to solid ratio of 0.4; temperature was the parameter that most influenced CO2 uptake, due to its enhancement effect on silicates dissolution.

Influence of particle size on the carbonation of stainless steel slag for CO2 storage / Baciocchi, R; Costa, G; Polettini, Alessandra; Pomi, Raffaella. - In: ENERGY PROCEDIA. - ISSN 1876-6102. - 1:(2009), pp. 4859-4866. [10.1016/j.egypro.2009.02.314]

Influence of particle size on the carbonation of stainless steel slag for CO2 storage

POLETTINI, Alessandra;POMI, Raffaella
2009

Abstract

The main aims of this work were to assess the CO2storage capacity of different particlesize fractions of stainlesssteelslag subjected to accelerated carbonation under mild operating conditions, to study the influence on reaction kinetics of some of the main operating parameters (temperature, pressure and liquid to solid ratio) and to determine the effects of the process on slag mineralogy and leaching behavior. Maximum CO2 uptakes of 130 g CO2/kg residues were measured for the finest grain size and decreased with particlesize owing to differences in reacting species availability and specific surface. Process kinetics proved relatively fast, achieving completion in around 2 hours with a CO2 pressure of 3 bar and an optimal liquid to solid ratio of 0.4; temperature was the parameter that most influenced CO2 uptake, due to its enhancement effect on silicates dissolution.
2009
Stainlesssteelslag; Particlesize; CO2; Carbonation; Kinetics; Mineralogy; Leaching
01 Pubblicazione su rivista::01a Articolo in rivista
Influence of particle size on the carbonation of stainless steel slag for CO2 storage / Baciocchi, R; Costa, G; Polettini, Alessandra; Pomi, Raffaella. - In: ENERGY PROCEDIA. - ISSN 1876-6102. - 1:(2009), pp. 4859-4866. [10.1016/j.egypro.2009.02.314]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/227772
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