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

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.