Ammonia Plasma-Catalytic Synthesis Using Low Melting Point Alloys
Ammonia Plasma-Catalytic Synthesis Using Low Melting Point Alloys
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DOI：
10.3390/catal8100437
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发表时间：
2018-10
期刊：
影响因子：
3.9
通讯作者：
Javishk Shah;J. Harrison;M. Carreon
中科院分区：
文献类型：
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作者：
Javishk Shah;J. Harrison;M. Carreon
一个多世纪以来，哈伯-博世工艺一直是氨合成的商业基准工艺。理论上，用于氨生产的等离子体催化合成具有成为哈伯-博世工艺的更绿色替代方案的巨大潜力。然而，氨合成的基础反应仍然需要一些详细的研究，尤其是射频等离子体。本文介绍了当采用 Ga、In 及其合金作为催化剂时，使用感应耦合射频等离子体合成氨。使用发射光谱法对等离子体进行表征，并使用扫描电子显微镜对催化剂表面进行表征。 Ga-In（0.6:0.4 和 0.2:0.8）合金在 50 W 等离子体功率下实现了 0.31 g-NH3/kWh 的最大能量产量和 196 MJ/mol 的能量成本。在催化剂表面观察到颗粒状节点，表明中间 GaN 的形成。
The Haber-Bosch process has been the commercial benchmark process for ammonia synthesis for more than a century. Plasma-catalytic synthesis for ammonia production is theorized to have a great potential for being a greener alternative to the Haber-Bosch process. However, the underlying reactions for ammonia synthesis still require some detailed study especially for radiofrequency plasmas. Herein, the use of inductively coupled radiofrequency plasma for the synthesis of ammonia when employing Ga, In and their alloys as catalysts is presented. The plasma is characterized using emission spectroscopy and the surface of catalysts using Scanning Electron Microscope. A maximum energy yield of 0.31 g-NH3/kWh and energy cost of 196 MJ/mol is achieved with Ga-In (0.6:0.4 and 0.2:0.8) alloy at 50 W plasma power. Granular nodes are observed on the surface of catalysts indicating the formation of the intermediate GaN.