| CPC C01B 3/40 (2013.01) [C01B 2203/0233 (2013.01); C01B 2203/0238 (2013.01); C01B 2203/0261 (2013.01); C01B 2203/1047 (2013.01); C01B 2203/1241 (2013.01); C01B 2203/1614 (2013.01); C01B 2203/1628 (2013.01); C01B 2203/169 (2013.01)] | 22 Claims | 

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               1. A method for operating a reactor system, the method comprising: 
            providing an input stream to the reactor system, the input stream including a reducing gas stream and an oxidant stream; 
                determining an initial oxygen content of a metal oxide in the reactor system; 
                measuring an oxygen content of the input stream; 
                measuring an oxygen content of an output stream from the reactor system; 
                calculating a percent oxygen depletion of the metal oxide using the initial oxygen content of the metal oxide, the oxygen content of the input stream, and the oxygen content of the output stream; and 
                when the percent oxygen depletion of the metal oxide is above a predetermined threshold between 5% and 15%, adjusting a mole ratio of reducing gas to oxidant in the input stream. 
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