氢化钛粉脱氢过程伴随脱氮行为的热力学分析  

THERMODYNAMIC ANALYSIS OF THE BEHAVIOR OF DENITROGENATION DURING TITANIUM HYDRIDE POWDER DEHYDROGENATION

作　　者：刘福平[1] 陈平[1] 杨凯珍[1] 

机构地区：[1]广州有色金属研究院,广东广州510651

出　　处：《粉末冶金工业》2009年第6期9-12,共4页Powder Metallurgy Industry

摘　　要：氢化钛粉脱氢后氮含量明显降低,对这一行为的热力学分析表明:氢化钛脱氢过程产生的单原子氢还原钛中氮,其反应的吉布斯自由能在标准状态下为负值,反应获得很大的驱动力,易自发进行;而在脱氢温度的标准状态下,TiH2脱氢生成单原子氢的反应不能自发进行,必须在非平衡状态下,通过降低脱氢系统的分压及提高温度才能进行,因此,TiH2脱氢生成单原子氢的反应是制约氢化钛脱氢过程脱氮行为的主要环节,并且这一反应主要发生在非平衡状态下系统的分压较低及温度较高的脱氢后期。Thermodynamic analysis of decrease of nitrogen in titanium hydride during dehydrogenation revealed, that the negative Gibbs free energy of denitrogenation by single hydrogen atoms obtainable during dehydrogenation under standard conditions,makes reaction easy to be carried out spontaneously with great drive;but under the temperature of dehydrogenation,the reaction of TiH2 dehydrogenation forming single hydrogen atoms could not be done spontaneously, it would be done only under imbalance conditions by reducing partial pressure and in creasing temperature of hydrogenation system, so the reaction of dehydrogenation of titanium hydride foming single hydrogen atoms is the key process for denitrification during dehydrogen,and the reation of denitrogenation will be done under low partial pressure and high tempreture.

关 键 词：氢化钛脱氢 脱氮 热力学 吉布斯自由能 

分 类 号：TF123[冶金工程—粉末冶金]