Carbon prodn by pyrolysis - in a plasma using hydrocarbon gas

摘要

The appts. used comprises a flanged cylindrical water cooled electrode assembly with top hydrocarbon gas inlet for the creation of a plasma at temp. of 2000-5000 degrees C. Hydrocarbons in liquid or gas form are then injected near the flanged connection between an upper and a lower electrode utilising the heat generated by the plasma. A second hydrocarbon inlet is placed further downstream in order to cool the pyrolysed prod. to 1100-1150 degrees K. At the outlet end of the appts. radial and axial jets atomise water onto the pyrolysed product reducing its temp. to around 500 degrees K. The so produced carbon has a pH-value = 8.1, an oil-number = 1.7 ml/g and a specific surface of 180 m2/g.