Release Time:2019-03-12  Hits:

Indexed by: Journal Article

Date of Publication: 2017-06-01

Journal: PLASMA PROCESSES AND POLYMERS

Included Journals: EI、SCIE

Volume: 14

Issue: 6,SI

ISSN: 1612-8850

Key Words: adsorption step; ammonia decomposition; hydrogen energy; plasma-catalysis; synergistic effect

Abstract: The synergy between catalyst and plasma has dramatically improved the efficiency of some plasma chemical processes. In this paper, the role of the electronically excited state NH3 (NH3*) in the synergy of a DBD plasma and a Fe-based catalyst for NH3 decomposition has been studied by in situ optical emission spectra diagnostics, as well as adsorption and desorption experiments. Results reveal that, the NH3* species could adsorb on the catalyst surface with higher adsorption capacity and stronger strength in comparison with ground-state NH3. The ammonia conversion increased by nearly 40% due to the contribution of NH3* species. Here, the acceleration of the surface adsorption step with excited reactants is proved to be another role of plasma in synergy with heterogeneous catalyst.