| 高压氢去除钒表面碳、氮、氧杂质的热力学分析 |
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| 引用本文： | 雷强华,陈长安,李游. 高压氢去除钒表面碳、氮、氧杂质的热力学分析[J]. 材料导报, 2011, 0(Z1) |
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| 作者姓名： | 雷强华 陈长安 李游 |
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| 作者单位： | 中国工程物理研究院; |
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| 基金项目： | 中国工程物理研究院科学技术基金资助项目(Y10-2) |
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| 摘 要： | 基于钒的相关相图,分析了钒表面钒的碳化物、氮化物和氧化物可能存在的形式。采用热力学方法计算了高温和高压条件下氢与钒碳化物、钒氮化物和钒氧化物的吉布斯自由能变,分析了高压氢去除上述杂质的可能性。计算结果表明,100MRa条件下钒表面的碳化物杂质转化为甲烷需要860K以上的温度;50MPa、低于1000K温度氢不能有效去除金属钒表面所有价态的钒氧化物;50MPa、298～1000K温度高压氢不能有效去除钒的氮化物。
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| 关 键 词： | 热力学 高压 氢 钒 |
Thermo-dynamical Analysis on Removing Carbon,Nitrogen,and Oxygen Impurities on the Surface Vanadium Metal under High Pressure of Hydrogen |
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| LEI Qianghua,CHEN Chang'an,LI You. Thermo-dynamical Analysis on Removing Carbon,Nitrogen,and Oxygen Impurities on the Surface Vanadium Metal under High Pressure of Hydrogen[J]. Materials Review, 2011, 0(Z1) |
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| Authors: | LEI Qianghua CHEN Chang'an LI You |
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| Affiliation: | LEI Qianghua,CHEN Chang'an,LI You (China Acadamy of Engineering and Physics,Mianyang 621907) |
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| Abstract: | based on vanadium concerned phase graphs,the forms of vanadium carbides,nitrides and oxides that may shape on vanadium metal surface are analyzed.Using thermo-dynamical method,the Gibbs free energy change for hydrogen reacting with those carbides,nitrides and oxides are calculated respectively at high temperature and high pressure condition.The theoretical computation results show that under hydrogen pressure of 100MPa,temperature higher than 860K is needed to make vanadium carbide change into methane;on th... |
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| Keywords: | thermodynamics high pressure hydrogen vanadium |
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