CFD Simulation of a 10 kW Chemical Looping with Oxygen Uncoupling System: Effects Of Process And Fuel Parameters

Conference · Sun Sep 25 04:00:00 EDT 2016

OSTI ID:1593239

Hamilton, Matthew A. ^[1]; Whitty, Kevin J.; Lighty, JoAnn S.

---

1. University of Utah

Chemical looping with oxygen uncoupling (CLOU) is a carbon-capture technology that utilizes a metal oxide as an oxygen carrier to separate oxygen from air. The metal oxide is oxidized in an air reactor and releases gaseous oxygen in a fuel reactor where a fuel, such as coal, is fed. CFD simulations will expedite the scale-up of CLOU systems to demonstration and utility size plants by resolving technical concerns and showing the CLOU technology at larger scales. In this study, Barracuda was used as the platform for simulation. The CLOU kinetics were incorporated into the simulation and the coal kinetics were explored for one-step versus two-step combustion kinetics. Two cases were run, one for a pure carbon-char and one with the inclusion of ash. Using the two-step kinetics and inclusion of ash in the simulation yielded reasonable temperatures in both the gas and particle phases. Also studied were the effects of heat input, via increasing the coal feed, and coal particle diameter. These simulations showed that the increasing of the coal heat input had little effect as compared to changing the particle diameter. Increased particle diameter increased the particle temperatures and decreased the carbon capture efficiency.

• Research Organization: University of Utah
• Sponsoring Organization: USDOE Office of Fossil Energy (FE)
• DOE Contract Number: FE0025076
• OSTI ID: 1593239
• Report Number(s): DOE-U_Utah-0025067-10
• Country of Publication: United States
• Language: English