Abstract

Much of the sulfur sorbent research and development work has focused considerably on zinc-based sorbents. Because of concern over the gradual loss of reactivity and physical deterioration in long-term cyclic operation at elevated temperature, extensive research is still being conducted to improve the performance of zinc-based sorbents; justifiably, however, investigation of non-zinc-based materials has also been pursued as a logical approach to develop more effective alternatives. This paper reports on research conducted for the development of copper-based sorbents for hot coal gas desulfurization applications in the temperature range of 550−650 °C. A thermodynamic analysis is given to rationalize the selection of chromia (Cr2O3), and its potential superiority to alumina (Al2O3), for the stabilization of copper oxide (Cu2O) against complete reduction to elemental copper (Cu) upon exposure to a fuel gas in the indicated temperature range. The results of packed-bed experiments carried out for the determinat...

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