| In Situ Raman Spectroscopy Study on Dissociation of Methane at High Temperatures and at High Pressures |
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| 作者姓名： | 陈晋阳 金鹿江 董俊萍 郑海飞 |
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| 作者单位： | [1]School of Environmental and Chemical Engineering, Shanghai University, Shanghai 201800 [2]School of Sciences, Shanghai University, Shanghai 200436 [3]School of the Earth and Space Sciences, Peking University, Beijing 100871 |
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| 基金项目： | Supported by National Natural Science Foundation of China under Grant No. 20777048, and the Shanghai Leading Academic Disciplines （T105）. |
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| 摘 要： | We investigate the stability and dissociation of methane, which is the most abundant organic molecule in the universe, using diamond anvil cell （DAC） with in situ Raman spectroscopy up to 903K and 21 GPa. At the temperatures of 793 and 723 K and the corresponding pressures of 16.15 and 20.30 GPa, methane dissociates to form carbon ＇soot＇ and heavier hydrocarbons involving C=C and C≡C bonds. However, if the pressure is not very high, methane remains stability up to the highest temperature of 903 K of the work. The four symmetric C-H bonds of methane split at high temperatures and at high pressures, and there is at least one phase transition of crystalline symmetry from face centred cubic （fcc） to hexagonal close packed （hcp） before dissociation.
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| 关 键 词： | 甲烷 高温高压情况 分裂 原拉拉曼光谱 |
| 收稿时间： | 2007-10-11 |
In Situ Raman Spectroscopy Study on Dissociation of Methane at High Temperatures and at High Pressures |
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| CHEN Jin-Yang,JIN Lu-Jiang,DONG Jun-Ping,ZHENG Hai-Fei.In Situ Raman Spectroscopy Study on Dissociation of Methane at High Temperatures and at High Pressures[J].Chinese Physics Letters,2008,25(2):780-782. |
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| Authors: | CHEN Jin-Yang JIN Lu-Jiang DONG Jun-Ping ZHENG Hai-Fei |
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| Institution: | School of Environmental and Chemical Engineering, Shanghai University, Shanghai 201800School of Sciences, Shanghai University, Shanghai 200436School of the Earth and Space Sciences, Peking University, Beijing 100871 |
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| Abstract: | |
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| Keywords: | 91 67 De 33 20 Fb |
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