Kinetic and thermodynamics studies on the decompositions of Ni3C in different atmospheres
Kinetic and thermodynamics studies on the decompositions of Ni3C in different atmospheres
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DOI：
10.1016/j.tca.2008.04.003
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发表时间：
2008-07-10
影响因子：
3.5
通讯作者：
Li, Xingguo
中科院分区：
文献类型：
--
作者：
Leng, Yonghua;Xie, Lei;Li, Xingguo
研究了碳化镍在氩气、空气和氢气气氛下的热分解过程。X射线衍射结合元素分析表明，Ni 3C在Ar气氛中分解时，伴随着质量不变量，生成了金属镍和固态无定形碳。而在H-2气氛下，反应只留下金属镍。碳化镍中的碳组分与H2-反应生成甲烷，甲烷是主要的挥发性气体。Ni 3C中的镍和碳组分都与空气中的O-2反应生成相应的氧化物。此外，我们计算了分解过程的活化能和摩尔生成焓的Ni 3C的基础上的热分析。(C)2008 Elsevier B. V.保留所有权利。
The thermal decompositions (including TG and DSC) of nickel carbide were studied under different atmospheres of Ar, air and H-2. X-ray diffraction combined with element analysis indicated that nickel metal, together with solid amorphous carbon, was formed during Ni3C decomposition in Ar atmosphere, accompanying mass invariant in this process. While in H-2 atmosphere nickel metal was the only residual from reactions. The carbon component of nickel carbide reacted with H-2 to form methane as the main volatile gases. Both the nickel and carbon components of Ni3C reacted with O-2 in the air to form their corresponding oxides. Moreover, we calculated the activation energy for the decomposition process and the molar enthalpy of formation of Ni3C based on the thermal analysis. (C) 2008 Elsevier B.V. All rights reserved.