PETR 116 |
| Ammonia decomposition is an appealing hydrogen production route for fuel cell application. In this presentation we would discuss a novel plasma-catalysis method for ammonia decomposition. Our motive is to apply non-equilibrium plasma to ammonia decopmposition catalyzed by non-noble metal catalysts, so as to accelerate the recombinative desorption rates of surface-adsorbed nitrogen atoms. Based on systematic explorative experiments, strong activity-enhancing synergetic effects have been seen between dielectric-barrier discharge (DBD) plasma and supported non-noble metal catalysts including Fe, Cu, Mo, Ni and Co. For example, in the case of being used separately at 490°C, the conversion of NH3 obtained with Fe/Al2O3 catalyst and DBD plasma was only 13.4% and 10.1%, respectively. However, in the same conditions the combination of the DBD plasma with Fe/Al2O3 catalyst dramatically increased the conversion of NH3 to more than 99%. Compared with Fe catalyst, Cu, Mo, Ni and Co showed better activity-enhancing synergetic effect with DBD plasma. By employing XRD, XRF, Uv-Raman, XPS, TEM and TPD, the nature of the activity-enhancing synergetic effect between DBD plasma and supported metal catalysts was investigated. The promotion of the recombinative desorption rates of surface-adsorbed nitrogen atoms by DBD plasma has been confirmed by TPD. |
|
2nd Symposium on Hydrogen from Renewable Sources and Refinery Applications
1:00 PM-5:20 PM, Tuesday, April 8, 2008 Morial Convention Center -- Rm. 209, Oral
Division of Petroleum Chemistry |