石墨、菱铁矿与超临界水反应的实验研究

 为研究地球深部无机成烃的机制，在金刚石压腔（DAC，温度为800~1 500 ℃，压力略大于1 GPa）中进行了石墨和菱铁矿分别与超临界水反应的实验研究。用气相色谱法分析了气体产物的组成，发现其中均有大量的甲烷生成，并伴有CO₂和CO；此外还有少量其它烃类。上述结果意味着在地球深部高温高压条件下，含碳物质与超临界水反应可能是一种新的、重要的成烃机制。

EXPERIMENTAL STUDY ON REACTIONS OF GRAPHITE AND SIDERITE WITH SUPERCRITICAL WATER

In order to investigate the formation mechanism of abiogenetic hydrocarbon in the deep earth, experiments on reactions of graphite and siderite with supercritical water have been conducted using the apparatus of diamond anvil cell (DAC) under temperature about 800～1 500 ℃ and pressure approximately above 1 GPa. The gas phase products have been analyzed by means of gas chromatography, which show that both reactions can generate a large number of methane, accompanied with small amount of CO₂ and CO and some other hydrocarbons. The above results suggest that under the high temperature and pressure conditions in the earth's interior, reactions of carbon-bearing materials with supercritical water is likely a new and important mechanism in hydrocarbon formation.