Method for catalytic conversion of waste plastic into liquid fuel

A system for conversion of waste plastic into a liquid fuel, the system comprising:

• a. a feed hopper adapted to collect the waste plastic feed;
• b. a screw feeder adapted to feed a waste plastic feed and a catalyst to a rotary kiln reactor;
• c. the rotary kiln reactor adapted to thermally decompose the waste plastic;
• d. a cylindrical pipe positioned in the rotary kiln reactor and adapted to facilitate the thermal decomposition of the waste plastic in the annulus area of the kiln reactor and to increase a velocity of product vapour;
• wherein the cylindrical pipe is closed at both the ends;
• e. helical baffles attached to the inner wall of the rotary kiln reactor from one end to other end and adapted to increase the residence time of catalyst and molten plastic;
• f. a draft fan adapted to generate negative pressure in the rotary kiln reactor;
• g. a cyclone separator adapted to separate the residual catalyst and char particles from the gaseous stream generated in the rotary kiln reactor to obtain a gaseous stream;
• h. a bio-char drum adapted to collect solid particles separated in the cyclone separator;
• i. a four stage condensation unit adapted to cool the gaseous stream;
• j. a liquid collection tank unit adapted to collect condensed liquid from the condensation unit;
• and
• k. a gas liquid separator adapted to separate non-condensable gases from the liquid fraction.