Kinetics of the Non-Catalytic Water Gas Shift Reaction in Supercritical Water
Energy Sources: Part A
A kinetic analysis of the noncatalytic water gas shift reaction in a supercritical water medium was investigated using a specially designed 383 mL Haynes Alloy 230 tubular reactor at a constant pressure of 24.12 ± 0.04 MPa, water to carbon monoxide molar feed ratios of 5 to 37 moles of water per mole of carbon monoxide, and at temperatures varying from 768 to 1,048 K. The carbon monoxide concentration in the effluent gas reached a minimum of one mole-percent at 1,048 K, which corresponds to a 98% carbon monoxide to carbon dioxide conversion. Using global first-order kinetics a frequency factor of 105.76 ± 1.42 s−1 and an activation energy of 139.8 ± 24.5 kJ/mol was determined. It was also found that the developed kinetic rate model closely fits the experimental reaction data, with a coefficient of determination of R2 = 0.95, over a wide range of temperatures and reactant concentrations.
ISSN: 1556-7036, ESSN: 1556-7230
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Wenzel, Johnathon; Picou, J.; Stever, M.; Bouquet, J.; and Lee, S., "Kinetics of the Non-Catalytic Water Gas Shift Reaction in Supercritical Water" (2014). Chemical Engineering Publications. 1.