Thermal transport model of a packed-bed reactor for solar thermochemical CO2 capture

Leanne Reich, Roman Bader, Terrence Simon, Wojciech Lipiński

Research output: Contribution to journalArticlepeer-review

10 Scopus citations

Abstract

A 1 kWth dual-cavity solar thermochemical reactor concept is proposed to capture carbon dioxide via the calcium oxide based calcination-carbonation cycle. The reactor design is refined using a numerical heat and fluid flow model for the calcination step. The Monte Carlo ray-tracing and net radiation methods are employed to solve for radiative exchange in the inner cavity, coupled with a computational fluid dynamics analysis to solve the mass, momentum, and energy equations in the concentric reaction zone modeled as a gas-saturated porous medium consisting of optically large particles. The cavity diameter and length-to-diameter ratio are varied to study their effects on pressure drop, temperature distribution, and heat transfer in the reactor. The Monte Carlo ray-tracing and net radiation methods are compared for accuracy and computation time. The net radiation method reaches convergence 1.5 times faster than the Monte Carlo ray-tracing method and provides a smoother radiative flux distribution. Increasing the cavity diameter and length-todiameter ratio at a fixed volume of the reaction zone decreases the radial temperature gradients across the cavity wall and within the reaction zone. However, it also results in increased pressure drop and reduced heat transfer to the reaction zone.

Original languageEnglish (US)
Pages (from-to)197-209
Number of pages13
JournalSpecial Topics and Reviews in Porous Media
Volume6
Issue number2
DOIs
StatePublished - 2015

Keywords

  • CO capture
  • Carbonation-calcination cycle
  • Chemical reactor modeling
  • Radiation
  • Solar
  • Thermochemical

Fingerprint Dive into the research topics of 'Thermal transport model of a packed-bed reactor for solar thermochemical CO<sub>2</sub> capture'. Together they form a unique fingerprint.

Cite this