Input: Plastics.

What are Plastics?

Long Chain of molecules mainly composed of Carbon and Hydrogen.

HDPE, LDPE, PP and PS account for 70% of the plastics used in packaging. These are all useful inputs for the process

Output: Petroleum Products

Output from 1 KG of Plastic  

         ProductQuantity
Liquid Hydrocarbons600 gms to 800 gms
Coke70 gms to 100 gms
GasEquivalent to produce net2.25 units of electricity.

Output Yield Data

The major process parameters and product yields are given in Table below. The evolved vapors are condensed to collect gas and liquid products.

FeedAssorted waste plastic
Catalyst0.1 wt% on feed
Temperature300-400 °C
PressureAtmospheric
Batch cycle time3-4 hrs
The product yieldsQuantity (wt%)
Gas10-20
Liquid hydrocarbons60-80
Coke7-10

Typical analysis of the gaseous product

ComponentQuantity (wt%)
Methane6.6
Ethane+ethylene10.6
Propane7.4
Propylene29.1
Iso-butane1.9
n-Butane0.9
C4 (unsaturated)25.6
Iso C5-n-C50.1
C5+higher15.3
Hydrogen2.5
CO/CO2< 400 ppm

NB: The gas analysis was done after removal of chlorine as HCl Typical analysis of the liquid product is given in the following table

Carbon numberQuantity (wt%)
Upto C1061.0
C10 to C132.4
C13 to C168.5
C16 to C204.1
C20 to C237.6
C23 to C3016.4