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发布时间：2019-03-12

论文类型：期刊论文

发表时间：2017-06-01

发表刊物：PLASMA PROCESSES AND POLYMERS

收录刊物：EI、SCIE

卷号：14

期号：6,SI

ISSN号：1612-8850

关键字：adsorption step; ammonia decomposition; hydrogen energy; plasma-catalysis; synergistic effect

摘要：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.