负载型镍催化剂上稀氨水的选择性湿式空气氧化
Selective wet-air oxidation of diluted aqueous ammonia solutions over supported Ni catalysts.
作者信息
Kaewpuang-Ngam Sutasinee, Inazu Koji, Kobayashi Takaaki, Aika Ken Ichi
机构信息
Department of Environmental Chemistry and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, 4259 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan.
出版信息
Water Res. 2004 Feb;38(3):778-82. doi: 10.1016/j.watres.2003.10.025.
Wet-air oxidation (WAO) of diluted aqueous ammonia solutions over Ni supported on Al(2)O(3) catalysts was investigated. A nitrogen selectivity of approximately 90% was achieved by the WAO of ammonia over the 20-wt% Ni/Al(2)O(3) catalyst at 503K, a reaction time of 2h and air-feed pressure of 2.0MPa without the dissolution of Ni during the reaction. Ni/Al(2)O(3) pretreated by calcinations in air at 1173K for 4h showed high stability due to the formation of a NiAl(2)O(4) phase.
研究了负载在Al₂O₃催化剂上的镍对稀氨水进行的湿式空气氧化（WAO）。在503K、反应时间为2小时、空气进料压力为2.0MPa的条件下，通过20重量%的Ni/Al₂O₃催化剂对氨进行WAO，实现了约90%的氮选择性，且反应过程中镍未溶解。在1173K空气中煅烧4小时预处理的Ni/Al₂O₃由于形成了NiAl₂O₄相而表现出高稳定性。
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