高温高压下水中有机质降解过程的原位观测——以干酪根和沥青质为例

IN SITU VISUALIZATION OF PYROLYSIS OF ORGANIC MATTER IN HIGH-TEMPERATURE AND HIGH-PRESSURE WATER—TAKING KEROGEN AND ASPHALT AS AN EXAMPLE

陈晋阳 张红 郑海飞 曾贻善

Chen Jinyang Zhang Hong Zheng Haifei Zeng Yishan

上海大学, 环境与化工学院, 上海, 201800 2. 中国科学院广州地球化学研究所,中国科学院研究生院, 广州, 510640 3. 北京大学, 地球与空间学院, 北京, 100871

School of Environmental and Chemical Engineering, Shanghai University, Shanghai 201800, China 2. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Guangzhou, Guangdong 510640, China 3. School of the Earth and Space Sciences, Peking University, Beijing 100871, China

采用热液对顶砧压腔装置,对高温高压水中干酪根和沥青质的热解过程进行了原位观测。结果发现干酪根和沥青质在高温高压水中的热解行为存在很多的差别:干酪根不溶于高温高压水中,并保持固相状态直到发生异相降解反应,生成的小分子的液相和气相烃类化合物能够与高温高压下的水混溶,而当温度降低后这些烃类物质则从水中析出;沥青质在高温高压下首先与水混溶,混溶后随着温度和压力的继续升高发生降解反应,最终生成类似石墨结构的碳物质。

The in situ visualization of pyrolysis of kerogen and asphalt in high-temperature and high-pressure water studied by hydrothermal anvil cell.The phenomena of these two matter present great different.Kerogen pyrolyzes to liquid and gas phase hydrocarbon compounds in an inhomogeneous form at high temperature and high-pressure.These hydrocarbon compounds dissolve in water at high temperature and high-pressure and separate out during the decrease of temperature to the ambient temperature.Asphalt dissolves in water at high temperature and high pressure firstly,with increasing temperature further,it finally reactions with water to form graphite-soot matter.

国家自然科学基金(10299040和40302012)

https://doi.org/10.11781/sysydz200601073