Detailed Process Analysis


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  

         Product

Quantity

Liquid Hydrocarbons

600 gms to 800 gms

Coke

70 gms to 100 gms

Gas

Equivalent to produce net

2.25 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.

Feed

Assorted waste plastic

Catalyst

0.1 wt% on feed

Temperature

300-400 °C

Pressure

Atmospheric

Batch cycle time

3-4 hrs

The product yields

Quantity (wt%)

Gas

10-20

Liquid hydrocarbons

60-80

Coke

7-10

 

Typical analysis of the gaseous product

Component

Quantity (wt%)

Methane

6.6

Ethane+ethylene

10.6

Propane

7.4

Propylene

29.1

Iso-butane

1.9

n-Butane

0.9

C4 (unsaturated)

25.6

Iso C5-n-C5

0.1

C5+higher

15.3

Hydrogen

2.5

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 number

Quantity (wt%)

Upto C10

61.0

C10 to C13

2.4

C13 to C16

8.5

C16 to C20

4.1

C20 to C23

7.6

C23 to C30

16.4