Abstract
Reversible solid oxide cell (RSOC) can efficiently store intermittent renewable energy in the form of fuel. Proton-conducting RSOC is a promising way to reach the goal of reducing the SOFC operating temperature and improve the CH4 production. In this paper, intermediate temperature proton conducting RSOC has been used for the test of micro-tubular RSOC. The experiments have been performed at 480-560°C on a Ni-BCZI / BCZI (BaCe0.5Zr0.4Y0.1O3) / LSC-BCZI micro-tubular cell. The effects of inlet gas composition and temperature on the cell performance and CH4 production has been discussed in detail. The max CH4 production rate reaches 20% in our experiment at 480°C. To further optimize the micro-tubular RSOC, a two-dimensional (2D) micro-tubular RSOC model is developed. Pressurization is proved to be an effective way for CH4 production enhancement.
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