The input feed consists of sized plastic
chips, 10% by weight coal and 1% by weight of Silica catalyst. The
temperature inside the reactor was maintained in the range of
350–400 C with the help of temperature controller. The reaction
was carried out for 4 h at atmospheric pressure. Pyrolysis process
yielded plastic oil (80% by weight of input), solid coke residue
(15% by weight) and gaseous fractions which is a mixture of propylene,
iso butane, ethane and small amounts of methane (5% by
weight). The basic composition of plastic pyrolysis oil is given in
Table 1. All the gaseous products from this process either condensed
to liquids and non-condensable products are treated by
passing it through the water chamber before it is let out. Most of
the toxins are either burned out in the lack of oxygen or reduced
in the presence of a catalyst. The properties of diesel and plastic
oil are given in