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

页码：3694 / 3697

页数：4

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