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- W2078507688 abstract "The rates of oxidation of CO to CO2 by particles of a co-precipitated mixture of CuO and Al2O3 (355–500 μm) have been measured in a fluidised bed; these measurements were not affected by interphase mass transfer or the deposition of carbon. Efforts were made to minimise sampling problems by using a rapid-response mass spectrometer to analyse the gases from the hotter beds or those fluidised by gases with high [CO]. However, the base-line of the mass spectrometer drifted with time, so an infra-red analyser measured [CO2] and [CO] in the off-gases from cooler beds, in which CO was oxidised to CO2 more slowly. These techniques enabled rates of reaction to be measured from 250 to 900 °C; the order of reaction in CO was always close to unity. It was established that above 500 °C, the oxidation of CO by particles of CuO was controlled mainly by external mass transfer. At ∼250 °C, it appears that CO reacts directly with solid CuO in: (1)CuO+CO→Cu+CO2.However, above ∼700 °C, CuO particles seem to react by the shrinking core mechanism, predominantly involving the two consecutive steps:(3)2CuO+CO→Cu2O+CO2,(4)Cu2O+CO→2Cu+CO2.The activation energies and pre-exponential factors for reactions (1), (4) were measured." @default.
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- W2078507688 date "2009-01-01" @default.
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- W2078507688 title "Kinetics of the chemical looping oxidation of CO by a co-precipitated mixture of CuO and Al2O3" @default.
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- W2078507688 doi "https://doi.org/10.1016/j.proci.2008.06.112" @default.
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