*4.2. Char from Waste Tyres*

Another valuable byproduct of waste-tyre pyrolysis is char. It is reported that the char produced from tyre conversion ranges from 22 to 49% by weight [19]. There are many researchers investigating the characteristics of the char. Table 3 shows the properties of waste tyre char. The chars have a low heating value of 29.3–31.5 MJ/kg, compared to tyre oil, which has a range of 38–42 MJ/kg. Therefore, tyre char can be used in a variety of industries, including cement and fertiliser.


**Table 3.** Properties of waste-tyre chars.
