The boiling point distribution of the pyrolysis liquid was substantially improved
(55-65% gasoline fraction) by either thermal or catalytic hydrprocessing (450 °C, 200 psig initial
H2 pressure). The effect of adding 1-5% of several catalysts was relatively small, increasing the
gasoline fraction over that obtained by thermal hydroprocessing by 5-10%. Addition of Na2CO3
to the hydroprocessing reactor decreases the chlorine content of the final product to a few ppm.
These results indicate that pyrolysis followed by hydprocessing of the pyrolysis liquids is a good
approach for true PCP that contains a significant amount of chlorine, paper and inorganic
material.
Introduction