Abstract

Capture of solar thermal energy by means of chemical conversion provides an attractive means for collection of solar energy. A converter has been designed for operation at the focus of a 7 m diameter paraboloid. The converter is constructed from a multi-passage ceramic extrusion, which is wound into a spiral form prior to firing. The innermost wrap is designed to operate with a cavity-facing surface heated to 1000°C. In the passages adjacent to this surface SO 3 is catalytically dissociated into SO 2 and O 2. The eight outer wraps are used for heat exchange between an inflowing SO 3 rich gas stream and an outflowing SO 2 rich gas stream.

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