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

doi:10.19595/j.cnki.1000-6753.tces.200340

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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%.

Key words： Low temperature plasma catalysis ammonia synthesis fluid model Low temperature plasma catalysis ammonia synthesis fluid model

Received: 07 April 2020

PACS:	O53
	TM8

Fund:国家自然科学基金（51977063）、湖南省自然科学基金（2020JJ5053）和电力系统国家重点实验室开放课题（SKLD19KZ01）资助项目

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	Wang Feng
	Chen She
	Zhuang Chijie
	Liu Hongmei
	Wu Ting
	Wang Feng
	Zhuang Chijie

Cite this article:

Wang Feng,Chen She,Zhuang Chijie等. 1D Fluid Model of Catalytic Ammonia Synthesis Enhanced by Low Temperature Plasma[J]. Transactions of China Electrotechnical Society, 2021, 36(13): 2730-2739.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.200340 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/I13/2730

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