Presentation Information
[2P03]Ammonia synthesis from methane and nitric oxide using alumina-supported platinum catalysts
*Emika Yamashita1, Kyoko K. Bando2, Toshitaka Kubo2, Atsushi Takagaki1 (1. Graduate School of Engineering Science, Yokohama National University, 2. National Institute of Advanced Industrial Science and Techology (AIST))
Global nitrogen flow has already passed the planetary boundary. Mitigation of reactive nitrogen oxides (NOx) by converting NOx to NH3 could be one of the measures to tackle the problem. We found that NO was converted to NH3 by a reaction with CH4 over Pt/Al2O3 catalysts. The activity of catalysts was evaluated by the performance at 450 ºC. The Pt loading and the reaction start temperature (ST) had a serious influence on the activity. 1 wt.% Pt/Al2O3 showed a better NH3 yield than 5 wt.% Pt/Al2O3, probably due to the difference of Pt particle size. The effect of ST was tested with 1 wt.% Pt/Al2O3 and it was found that the low ST gave a better performance. In the condition which started the reaction at 250 ºC, the final NH3 yield reached 69 % at 450 ºC, which was kept stable for 5 hours afterwards. It is suggested that ST affects the composition of the catalyst surface. The results of FTIR analysis of the adsorbed species will be discussed in the presentation.