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A “Smart” Hollandite DeNOx Catalyst: Self-Protection against Alkali Poisoning

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  • This research was supported financially by the NSFC (20977018, 21077026, and 21277032) and the NBRPC (2010CB934501).

Abstract

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Banish the villains to their own realm: Biomass has gained widespread attention as a renewable energy source. However, commercial catalysts used in power plants (co-)fuelled by biomass are deactivated by the alkali-rich flue gas (see graph, black line). In contrast, one of two types of active sites in a promising alkali-resistant hollandite catalyst traps alkali-metal ions to free up the catalytically active sites for the reduction of NO by NH3.

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