CATL 16 |
| Thomas Hammer, Electromagnetic Systems and Plasma Technology, Electromagnetic Systems and Plasma Technology, Siemens AG, CT EN3, Paul-Gossen-Str. 100, 91052 Erlangen, Germany |
| Catalytic reactions of a gas mixture can efficiently be induced by pre-treatment using a gas discharge plasma or by combined treatment in a plasma-catalytic hybrid reactor. The effects of plasma treatment can be excitation of molecules, formation of short lived radicals, formation of long lived intermediate species, emission of UV-radiation, or simply gas heating. By dielectric barrier discharge pre-treatment of Diesel engine exhaust selective catalytic reduction of nitric oxides on a V2O5-WO3/TiO2-catalyst could be induced at temperatures as low as 100 °C. Due to the low specific plasma input energy density esp of about 10 J/liter gas heating does not play a role. Plasma catalytic methane steam reforming using a Ni-catalyst was performed in a dielectric packed bed reactor at temperatures down to 200 °C. Since for reforming esp values exceed 1 kJ/liter both non-thermal plasma effects and gas heating contribute to the plasma-catalytic hybrid process. A review focusing on the plasma-chemical kinetics is given. |
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Plasma Technology and Catalysis
8:00 AM-12:00 PM, Tuesday, March 25, 2003 Convention Center -- Room 342, Oral
Catalysis & Surface Science Secretariat |