1D Fluid Model of Catalytic Ammonia Synthesis Enhanced by Low Temperature Plasma
Chen She1,2, Liu Hongmei1, Wu Ting1, Wang Feng1, Zhuang Chijie2
1. College of Electrical and Information Engineering Hunan University Changsha 410082 China; 2. State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing 100084 China
Abstract：Ammonia has great application potential in the fields of chemical industry and energy storage. Low temperature plasma makes the reaction occur under mild conditions and has been experimentally proven to play an important role in enhanced-catalytic formation of ammonia. In the previous studies, the electric field and electron density were used as input parameters in the zero-dimensional kinetic models. However, their spatial information was ignored. Therefore, further modeling is needed to study the plasma catalysis mechanism. In this paper, a 1D fluid model of plasma-assisted catalytic ammonia synthesis is built under a plate-plate electrode configuration at atmospheric pressure. In the model, 47 species and 379 reactions, including gas-phase and hetero- geneous reactions on catalytic surface, are considered. The distribution of electric field, electron energy and electron density which affect the ammonia production are obtained. Furthermore, the effects of applied voltage, N2：H2 ratio content and free site density of catalyst surface on ammonia synthesis are discussed. The simulation results show that the ammonia yield first increases and then decreases as the applied voltage increases. The N2：H2 ratio of 1：2 is favor to the ammonia production. When the surface site density increases from1014 to 1018cm-2, the increase in ammonia yield is about 9.89%.
陈赦, 刘红梅, 吴婷, 汪沨, 庄池杰. 低温等离子体增强催化氨合成机理的一维流体动力学模型[J]. 电工技术学报, 2021, 36(13): 2730-2739.
Chen She, Liu Hongmei, Wu Ting, Wang Feng, Zhuang Chijie. 1D Fluid Model of Catalytic Ammonia Synthesis Enhanced by Low Temperature Plasma. Transactions of China Electrotechnical Society, 2021, 36(13): 2730-2739.
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2021, Vol. 36 
