It is named after the main production site of Fushun, Liaoning province in northeastern China.
Although the process was technically viable, the cooperation was halted due to high operation costs.
[5][6] The Fushun process is classified as an internal combustion technology but also includes external gas heating.
[7] It uses a vertical cylindrical type shaft retort, with outside steel plate lined with inner fire bricks.
Raw oil shale particles with the size of 10 to 75 millimetres (0.4 to 3.0 in) are fed from the top of the retort.
The shale ash exits from a rotating water dish that acts as a seal and cooler at the bottom of the retort.
Twenty retorts typically share one condensation system and a set of heating furnaces.
[9] The process is characterized by the high thermal efficiency, but due to the addition of air into the retort, the nitrogen dilutes the pyrolysis gas.