Abstract
The Sevilla Powder Tester: A Tool for Measuring the Flow Properties of Cohesive Powders at High Temperatures
Highlights
The calcium looping (CaL) process has been widely investigated as a 2nd generation technology to capture CO2 from fossil fuel power plants with already proven high efficiency in large scale pilot plants (1–2 MWh) (Barker, 1974; Blamey et al, 2010; Chacartegui et al, 2016; Kierzkowska et al, 2013; Prieto et al, 2016; Valverde, 2013)
A possible technique for operating the CaL process in concentrated solar power plants (CSP) plants is to use fluidized bed reactors albeit other type of reactors such as falling particle, entrained flow and centrifugal particle reactors that might be better integrated in solar receivers are being investigated (Cordis, 2020; Esence et al, 2020; Karasavvas et al, 2020; Lisbona et al, 2020; Sarrion et al, 2016; Tesio et al, 2019; 2020), CaCO3/CaO solids to be employed in the CaL-CSP integration would preferably be in the form of fine powders to mitigate reaction rate limiting mechanisms such as pore plugging (Benitez-Guerrero et al, 2017) that might hinder the process at the most favorable operating conditions for the CaL-CSP integration (Hanak et al, 2015)
Durán-Olivencia et al (2020) studied the effect of temperature on the tensile strength measured for limestone samples having an average particle size of about 50 μm by means of the High Temperature Seville Powder Tester (HTSPT)
Summary
The calcium looping (CaL) process has been widely investigated as a 2nd generation technology to capture CO2 from fossil fuel power plants with already proven high efficiency in large scale pilot plants (1–2 MWh) (Barker, 1974; Blamey et al, 2010; Chacartegui et al, 2016; Kierzkowska et al, 2013; Prieto et al, 2016; Valverde, 2013). A possible technique for operating the CaL process in CSP plants is to use fluidized bed reactors albeit other type of reactors such as falling particle, entrained flow and centrifugal particle reactors that might be better integrated in solar receivers are being investigated (Cordis, 2020; Esence et al, 2020; Karasavvas et al, 2020; Lisbona et al, 2020; Sarrion et al, 2016; Tesio et al, 2019; 2020), CaCO3/CaO solids to be employed in the CaL-CSP integration would preferably be in the form of fine powders to mitigate reaction rate limiting mechanisms such as pore plugging (Benitez-Guerrero et al, 2017) that might hinder the process at the most favorable operating conditions for the CaL-CSP integration (Hanak et al, 2015) As it is wellknown from experience, the lack of material flowability may be a serious issue in industrial applications where fine powders are employed due to their high cohesiveness, which can be enhanced even further at high temperatures (Chirone et al, 2020; Lettieri et al, 2000; Macrì et al, 2017; Tomasetta et al, 2011). We review the main results recently obtained by means of this novel setup, with a special focus on the effect of temperature on the tensile yield strength of fine powders as depending on particle size, surface coating and material properties
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