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ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
CONSTRUCTAL DESIGN OF A MINERAL CARBONATION SYSTEM FOR POST-COMBUSTION CARBON CAPTURE
Submission Author:
Claudia Luiza Manfredi Gasparovic , PR
Co-Authors:
Claudia Luiza Manfredi Gasparovic, Sandro Froehner, George Stanescu, Marcelo Risso Errera
Presenter: Claudia Luiza Manfredi Gasparovic
doi://10.26678/ABCM.ENCIT2020.CIT20-0468
Abstract
Carbon capture (CC) has been presented as a crucial way of mitigating the effect of greenhouse gas emissions due to the great number of point CO2 emission sources. Mineral carbonation processes are among the safest and most promising alternatives for CC due to product stability. Nevertheless there are technical challenges that must be overcome in order to scale-up the technology. Devices must be designed for energy efficiency and sufficiently fast kinetics compatible with the flue gas emissions. This paper aims to present the first steps in designing a MC reactor for CO2 capture by way of constructal theory. This will be achieved by applying the constructal method to the process’ degrees of freedom such as initial ratio of reactants (CO-3 and Ca2+ ions), and geometric scales for the elemental volume, and studying its effect on merit figures such as amount of CO2 captured averaged over time, under global restrictions such as a fixed volume. Results show there is a visible compromise between the ratio of the reactant initial concentrations due to its effect on pH, while geometric relations for the multi-scale design indicate lower pressure losses are obtained when the constructal principle of equipartition of imperfections are applied. Results will be confronted with numerical simualations, and can be further extended to actual applications once the conditions are given.
Keywords
Carbon Capture, greenhouse gases, Constructal Design, mineral carbonation
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