Catalytic decomposition of ammonia over nitrided MoNx/α-Al2O3 and NiMoNy/α-Al2O3 catalysts

被引：132
|
作者：
Liang, CH [1 ]
Li, WZ [1 ]
Wei, ZB [1 ]
Xin, Q [1 ]
Li, C [1 ]
机构：
[1] Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2000年 / 39卷 / 10期
关键词：
D O I：
10.1021/ie990931n
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
Ammonia decomposition over nitrided MoNx/alpha-Al2O3 and NiMoNy/alpha-Al2O3 catalysts was investigated at temperatures 600-750 degrees C, GHSV = 1800-3600 h(-1). The conversions of ammonia decomposition over nitrided MoNx/alpha-Al2O3 and NiMoNy/alpha-Al2O3 catalysts at 650 degrees C are as high as 98.7% and 99.8%, respectively. The catalytic activity of ammonia decomposition varies significantly with the Ni/(Ni + Mo) atomic ratio, and reaches the maximum when the Ni/(Ni + Mo) atomic ratio is near 0.60. XRD characterization shows that the catalyst phases are in nitrided forms, such as Mo2N and Ni3Mo3N The high activity of the nitrided MoNx/alpha-Al2O3 and NiMoNy/alpha-Al2O3 catalysts is attributed to the nitride phases formed from the preparation and the reaction in the presence of ammonia.
引用
收藏
页码：3694 / 3697
页数：4
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