Supercritical Synthesis of Nanoparticles - Emission Catalyst

Christian  Kallesøe

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FC catalyst2

Supercritical Synthesis of Nanoparticles - Emission Catalyst

As the concern for emission from diesel engines increases, new stricter emission regulations are implemented such as LEV III, Tier 3 and Euro 6. These are creating challenges for the diesel industry, setting higher demands for the removal of the pollutants.

We are working on several emission catalyst particles for the removal of hydrocarbons, carbon monoxide and NOx gasses, where we aim at cost-effective catalyst materials. These particles include an oxygen buffer nanomaterial such as Ceria Zirconia (e.g. CexZr1-xO2) synthesized on washcoat particles, and decorated with precious metals, possibly adding transition or lanthanide metals for alloying.

DTI synthesis method advantages for emission catalyst:

  • Synthesis of oxide buffer nanoparticles decorated with precious catalyst nanoparticles in a single step
  • Excellent metal nanoparticle distribution onto oxide buffer particles
  • Minimal size distribution and high particle crytallinity

The above metioned advantages are important factors when reducing the usage of precious metals such as Pt and Pd and improving the durability.