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Keywords:

  • diesel engine exhaust;
  • heterogeneous catalysis;
  • NOx reduction;
  • solid-state reactions;
  • zeolites

Abstract

A solid-state ion-exchange method was developed to synthesize Cu-SSZ-13 catalysts with excellent performance in the selective catalytic reduction of NOx with NH3 (NH3-SCR) and with durable hydrothermal stability. Experiments provide evidence that isolated Cu ions were successfully exchanged into the pores, which are the active centers for the NH3-SCR reaction.