High-Pressure Redox Behavior of Iron-Oxide-Based Oxygen Carriers for Syngas Generation from Methane

For gas to liquid (GTL)-type applications, partial oxidation of methane (CH4) is a viable route for conversion of natural gas to valuable chemicals. The oxygen for this partial oxidation process can be supplied using solid oxygen carriers, which can be single or mixed metal oxides. A particular partial oxidation scheme for CH4 conversion consists of two reactors, using Fe-based oxygen carrier particles, which circulate within the two units and undergo cyclic reduction–oxidation (redox) reactions. The solid carriers, therefore, serve as a vehicle for oxygen between the units, enabling clean conversion of the fossil fuel with high-purity product streams generated. Unlike the conventional combustion and/or gasification, the gaseous products of the two reactors are inherently separated. This allows for minimization of downstream processing and gas separation, making it a highly efficient energy conversion process. For applications involving high-pressure downstream processing (such as producing syngas as an i...

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