Thermochemical production of hydrogen
Copper oxychloride, Cu2OCl2, was synthesized from CuCl, or CuCl2·2H2O in a tubular furnace in a dry air atmosphere between 325 and 400 °C. Thermal gravimetric and gas analysis of the reaction products were used to follow the decomposition of Cu2OCl2 in both dry air and argon environments. The thermograms show the release of chlorine and oxygen gases, the volatilization of CuCl, and a residue, identified as CuO, of ~17 to 25% which varies as the conditions of the run. A mechanism of reaction able to describe the experimental results has been proposed and used to explain other published data.
KeywordsCopper oxychloride Hydrogen production Copper–chlorine cycle Melanothallite Thermogravimetric analysis Powder XRD
We are grateful to Professor Brad Easton (UOIT) and Dr. Mike Gorton (University of Toronto) for supplying the TG and XRD systems, Professor Gregory Hope from Griffith University, Australia, for the synthesis of one of the copper oxychloride samples used as reference material. This work could not be performed without the support of the University of Ontario Institute of Technology, Argonne National Laboratory, Atomic Energy of Canada Limited and the Ministry of Research and Innovation through the Ontario Research Fund-Research Excellence program. This work was also supported by the U.S. Department of Energy’s Fuel Cell Technologies Program Offices. Argonne National Laboratory is managed for the U.S. Department of Energy by University of Chicago Argonne, LLC, under contract DE-AC-02-06CH11357.
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