聚乙烯与水反应的高温高压实验及热力学探讨

肖万生; 翁克难; 律广才; 汪本善

doi:10.11858/gywlxb.2001.03.002

聚乙烯与水反应的高温高压实验及热力学探讨

doi: 10.11858/gywlxb.2001.03.002

中国科学院广州地球化学研究所，广东广州 510640

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通讯作者:
肖万生

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出版历程
- 收稿日期: 2000-11-20
- 修回日期: 2000-11-20
- 发布日期: 2001-09-05

Experiments on Reaction of Polyethylene and Water under High Pressure and High Temperature

Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China

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Corresponding author: XIAO Wan-Sheng

摘要

摘要: 在金刚石压腔设备中进行聚乙烯的高温高压裂解实验研究。实验分含水和不含水两种情况。在显微镜下观察反应过程中的变化并显微照相记录有关现象，在高压下就位测定反应过程中荧光的变化。用气相色谱方法测定气相产物组成。含水实验中CH4占烃类气体产物的92%并有CO2生成，固体残余物非常少，表明水直接参与了化学反应，为烃类气体的形成提供氢源，为CO2的形成提供氧源。不含水实验中烃类气体的产率相对较低并有较多的固相残余物存在。用热力学理论探讨了实验中有关反应的机制。根据聚乙烯与干酪根结构的可比性，推测在水参与条件下有利于提高有机质裂解成烃的产率。
- 聚乙烯 /
- 水 /
- 高压荧光 /
- 气相色谱 /
- 热力学
Abstract: Hydrous and anhydrous pyrolysis of polyethylene under high temperature and high pressure was conducted in diamond anvil cell (DAC) apparatus. Reaction phenomena can be observed by microscope and be recorded by micrography during the experimental processes. At the meantime, in situ fluorescence change can be determined under high pressure. Compositions of gas products were analyzed by gas chromatographic technique. It shows that CH4 make up about 92% of the total gas hydrocarbon products, CO2 and very little solid residue were existed in the hydrous pyrolysis experiment. The results indicate that H2O participates in the chemical reaction directly, offering H to hydrocarbons and O to CO2. Anhydrous pyrolysis of polyethylene generates less gas hydrocarbons and much more solid residue than hydrous run. Thermodynamic theory was used to discuss reaction mechanism in the experiments. Compared polyethylene structure with kerogen, we infer that the ratio of hydrocarbons generation would be increased while H2O exist in the organic matter pyrolysis processes.
- polyethylene /
- H2O /
- fluorescence /
- gas chromatography /
- thermodynamics

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