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research-article

CFD modeling of the fuel reactor in NETL's 50 kWth chemical looping facility

[+] Author and Article Information
Ronald W. Breault

NETL, 3610 Collins Ferry Rd, Morgantown, WV 26507
ronald.breault@netl.doe.gov

Justin Weber

NETL, 3610 Collins Ferry Rd, Morgantown, WV 26507
Justin.Weber@netl.doe.gov

Sam Bayham

NETL, 3610 Collins Ferry Rd, Morgantown, WV 26507
Samuel.Bayham@netl.doe.gov

1Corresponding author.

ASME doi:10.1115/1.4036324 History: Received October 27, 2016; Revised March 08, 2017

Abstract

NETL has explored chemical looping in its 50 kW facility using a number oxygen carriers. In this work, the results for methane conversion in the fuel reactor with a hematite iron ore as the oxygen carrier are analyzed. The experimental results are compared to predictions using CFPD's Barracuda CFD code with kinetics derived from the analysis of fixed bed data. It has been found through analytical techniques from TGA data as well as the same fixed bed data that the kinetics for the methane-hematite reaction follow a nucleation and growth or Johnson-Mehl-Avrami (JMA) reaction mechanism. Barracuda does not accept nucleation and growth kinetics, however, there is enough sufficient variability of the solids dependence within the software such that the nucleation and growth behavior can be mimicked. This paper presents the method to develop the pseudo-JMA kinetics for Barracuda for the fixed bed data and then applies these values to the fuel reactor data for the 50 kW unit for validation. Finally, a fuel reactor design for near complete conversion is proposed.

Copyright (c) 2017 by ASME
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