[1E04-06] インターナショナル sess. 2

[1E04] 貴金属担持酸化ニオブを用いたアンモニア選択触媒酸化における担体の酸点の役割

○Lin Mingyue¹、An Baoxiang¹、武井 孝¹、宍戸 哲也¹、石田 玉青¹、春田 正毅¹、村山 徹^1,2 (1. 東京都立大学大学、2. Yantai University)

Ammonia is a strong odor that has negative impacts on human health and the environment. Selective catalytic oxidation (SCO) of NH₃ is an ideal method for its removal due to its environmental-friendly products of N₂ and H₂O. However, the developed catalysts either need high reaction temperatures or suffer the second pollution of the byproduct of N₂O. Thus, the development of low-temperature effective catalyst that exhibits high N₂ selectivity is very necessary. In this work, niobium oxide with a deformed orthorhombic structure was synthesized as the acidic metal oxide support for precious metals (Pt, Pd, and Au) for NH₃-SCO. High levels of N₂ selectivity (>95% at full conversion) were obtained in this study. The role of acid sites in improving N₂ selectivity was investigated. This study will provide a new concept for the design of catalyst for NH₃-SCO with high N₂ selectivity.