Transient thermal transport phenomena in reacting particles

Contact:
Investigators:
Funding source:

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 and efficiency.

Fig. 1. Reacting CaCO3/CaO particle under direct high-flux irradiation.

References

  1. P.P. Ebner and W. Lipiński. Heterogeneous thermochemical decomposition of a semi-transparent particle under direct irradiation. Chemical Engineering Science, 66:2677–2689, 2011.

    DOI: 10.1016/j.ces.2011.03.028

  2. P.P. Ebner and W. Lipiński. Heterogeneous thermochemical decomposition of a semi-transparent particle under high-flux irradiation—Changing grain size vs. shrinking core models. Numerical Heat Transfer Part A—Applications, 62:412–431, 2012.

    DOI: 10.1080/10407782.2012.703466

  3. P.P. Ebner and W. Lipiński. Heterogeneous thermochemical decomposition of a semi-transparent particle under high-flux irradiation—Uniform vs. non-uniform irradiation. Heat and Mass Transfer, 50:1031–1036, 2014.

    DOI: 10.1007/s00231-014-1311-7

  4. L. Yue and W. Lipiński. A numerical model of transient thermal transport phenomena in a high-temperature solid–gas reacting system for CO2 capture applications. International Journal of Heat and Mass Transfer, 85:1058–1068, 2015.

    DOI: 10.1016/j.ijheatmasstransfer.2015.01.124

  5. L. Yue and W. Lipiński. Thermal transport model of a sorbent particle undergoing calcination—carbonation cycling. AIChE Journal, in press.

  6. L. Yue and W. Lipiński. Effect of surface radiative properties of a CO2 sorbent particle on its interactions with high-flux solar irradiation. Optics Express, in press.

Updated:  29 January 2017/ Responsible Officer:  STG Leader/ Page Contact:  STG Webmaster