Abstract
The effect of several Ag, Cu and bimetallic Ag-Cu catalysts have been studied on the gasification reaction of a lignite char in dry air. In the bimetallic catalysts, the existence of alloy particles have been detected by SEM. The reactivity of the char with the bimetallic catalysts is higher than the addition of those obtained for the pure metals with the same metal amounts. The effect of SO 2 is to reduce the reactivity of the char in the catalysed reactions. An explanation for this phenomenon is given. The presence of Cu in Ag increases the resistance of some bimetallic catalysts to poisoning with SO 2.
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