Abstract
Ammonia synthesis from H2-N2 mixed gas was studied at room temperature in a glow-discharge plasma in the presence of metals or metal oxides. Magnesia (MgO) and calcia (CaO), which are oxides with solid basicity, revealed catalytic activity in the plasma synthesis of ammonia, although they are catalytically inactive in industrial ammonia synthesis. The acidic oxides (Al2O3, WO3, and SiO2-Al2O3) lead to the consumption of the reactant, i.e., the H2-N2 mixed gas. No ammonia was isolated. Metal catalysts showed higher activity than the above basic oxides. They have, however, different activities. The reaction was faster over the active materials than over sodium chloride (NaCl) or glass wool or in a blank reactor without any catalyst.
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Sugiyama, K., Akazawa, K., Oshima, M. et al. Ammonia synthesis by means of plasma over MgO catalyst. Plasma Chemistry and Plasma Processing 6, 179–193 (1986). https://doi.org/10.1007/BF00571275
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DOI: https://doi.org/10.1007/BF00571275