The liquid, gas and char are obtained by pyrolysis. The liquid has high moisture from original moisture (8-40%) and produced water (14-17%), and it is a mixture of water and polar organics. Its higher heating value is around 12.5-21 MJ/kg. The relationship between the viscosity and heating value of the liquid is shown in Fig. 4.3.2. Higher moisture content results in lower viscosity and lower heating value. In addition, the liquid is unstable, and any improvement is required.

The pyrolysis gas has much CO2, and CO, H2,

C1-5 hydrocarbon as combustible gas. The char has the higher heating value of 32 MJ/kg, and it is suitable as a feedstock for activated carbon.

However, all of the char is usually used as heat resource for the pyrolysis system.