Transient thermal transport phenomena in reacting particles
Numerical models coupling transient radiative, convective,
and conductive heat transfer and mass transfer to
chemical kinetics of heterogeneous solid–gas reactions
are developed and applied to selected model
reactions such as the decomposition of calcium carbonate
into calcium oxide and carbon dioxide (Fig. 1).
This particular model reaction is one of two reactions
involved in calcium oxide
looping, a proposed thermochemical process suitable for use with
concentrated solar radiation for the capture of carbon dioxide.
The analyzed system is a porous particle in a reactor–like
environment that is subjected to concentrated solar irradiation.
The models predict the time-dependent temperature
distributions as well as local solid and fluid phase composition.
They are used to investigate operating conditions under
which actual solar-driven processes can attain high reaction extents
Reacting CaCO3/CaO particle under direct high-flux irradiation.