PROJECT NAME: PLASTIC PYROLYSIS

M.Sc. Project

by

Mr. SUDARSHAN OHAL

M.Sc. (Organic Chemistry)

Submitted to

Department of Chemistry

Shri Chhatrapati Shivaji Mahavidyalaya Shrigonda, Ahilyanagar

(Savitribai Phule Pune University Pune)

UNDER THE GUIDANCE OF

Dr. PARESH DHEPE

SENIOR PRINCIPLE SCIENTIST

CATALYSIS & INORGANIC CHEMISTRY DIVISION

CSIR-NATIONAL CHEMICAL LABORATORY,

PUNE - 411008, MAHARASHTRA, INDIA

 CERTIFICATE

This is to certify that, the work presented in this project as entitled “PLASTIC
PYROLYSIS” being submitted to Shri Chhatrapati Shivaji Mahavidyalaya
Shrigonda, Ahilyanagar is partial fulfillment of Master of Science in Organic
Chemistry by Mr. SUDARSHAN OHAL is carried out under my supervision at
Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory,
Pune, during the academic year 2024-2025.

Dr. PARESH DHEPE

Senior Principle Scientist,

Catalysis and Inorganic Chemistry Division,

CSIR-National Chemical Laboratory,

Pune - 411008
 CANDIDATES DECLARATION

I hereby declare that the project work entitled “PLASTIC PYROLYSIS”

submitted to the Department of Chemistry, Shri Chhatratati Shivaji
Mahavidyalaya, Shrigonda, Ahilyanagar is partial fulfillment of Degree of Master
of Science by Savitribai Phule Pune University, Pune has not been submitted to any
other University Or institute this record is a original project work under the
supervision and guidance of Dr. PARESH DHEPE, Senior Principal Scientist,
Catalysis and Inorganic Chemistry Division, CSIR-National Chemical Laboratory,
Pune.

Mr. SUDARSHAN OHAL

Department of Chemistry,

S.C.S.M Shrigonda, Ahilyanagar,

Pin - 413701
 ACKNOWLEDGEMENTS

I would like to express my deepest gratitude to Dr. Paresh Dhepe, Senior Principal
Scientist, and Dr. Nandini Devi, Senior Principal Scientist, Inorganic Catalysis
Division, CSIR-National Chemical Laboratory, Pune, for their invaluable guidance,
encouragement, and unwavering support throughout this project. Their expertise
and insights significantly contributed to the successful execution of this research.

I am also sincerely grateful to Dr. M.D. Suryawanshi, Head of the Department of

Chemistry, and Prof. Vilas Sudrik of Shri Chhatrapati Shivaji Mahavidyalaya,
Shrigonda, Ahilyanagar, for their academic support and constant encouragement.

A special note of appreciation goes to Omkar Kavade and Mohommad Dayyan,

Project Associates, for their assistance and collaboration during various phases of
the project. Your support was instrumental in overcoming the challenges
encountered throughout this study.

Lastly, I extend my heartfelt thanks to my college friends, teachers, and everyone

who contributed directly or indirectly to the completion of this project. Your
encouragement and support have been invaluable.

Thank you all.

SUDARSHAN OHAL
 INDEX

Sr.no Content
1 Introduction
1.1 Plastic Pyrolysis

1.2 Importance
1.3 Overview of Plastic Pyrolysis
1.4 Types of Plastic
1.5 Pyrolysis Process
2 Material and Method
2.1 Catalyst Zeolite (ZSM-5)
2.1.1. Structure and Composition of ZSM-5 Zeolite
2.1.2. Catalytic Properties of ZSM-5
2.1.3. Shape-Selective Catalysis
2.1.4. Thermal and Hydrothermal Stability
2.1.5. Applications of ZSM-5
2.1.6. Modification of ZSM-5

2.2 Plastic
2.2.1. 100% virgin plastic
2.2.2. Segregated and unsegregated plastic
2.2.3. Daily use plastic
2.2.4. Low-density polyethylene (ldpe)

2.3 Experimental Section

2.3.1. Lab scale reactor (100ml)
 2.3.2. Reaction procedure
2.3.3. Reaction table
3 Result and Discussion
3.1. GC analysis
3.2. GC analysis of plastic pyrolysis oil

4 Conclusion

5 References
 PROJECT REPORT

1. INTRODUCTION:
Plastic pyrolysis is an innovative process for the treatment of plastic waste
that involves heating the plastic material in the absence of oxygen to produce
valuable products such as pyrolysis oil, charcoal, and synthetic gas. With the
growing concerns over plastic pollution and the increasing volume of plastic waste,
plastic pyrolysis has emerged as a potential solution to address this problem.
Plastic waste is a significant environmental challenge, as it takes hundreds of
years to decompose and releases toxic substances into the environment. In
addition, conventional methods of plastic waste management, such as landfilling
and incineration, have significant environmental and economic drawbacks. Plastic
pyrolysis offers a promising alternative that not only helps reduce the volume of
plastic waste but also recovers energy and valuable materials from it.
The objective of this project report is to provide an overview of plastic
pyrolysis, including the different types of plastic, the pyrolysis process, and the
advantages and disadvantages of this technology. Additionally, this review will
examine the different plastic pyrolysis technologies, the feedstock used for plastic
pyrolysis.
1.1 Plastic Pyrolysis:
Plastic pyrolysis is a process of breaking down plastic waste into simpler
molecules by heating the material in the absence of oxygen. The process results in
the conversion of plastic into a mixture of valuable products, including pyrolysis
oil, charcoal, and synthetic gas. The main advantage of plastic pyrolysis is that it
helps reduce the volume of plastic waste while recovering valuable materials and
energy from it. The process has been designed as an environmentally friendly
alternative to traditional plastic waste management methods, such as landfilling
and incineration, which have significant drawbacks in terms of environmental
impact and economic cost. Overall, plastic pyrolysis offers a promising solution for
addressing the growing problem of plastic waste and mitigating its negative impact
on the environment.

1.2. Importance:
Plastic pyrolysis is an innovative process that has the potential to
revolutionize the plastic waste management sector by providing a sustainable
solution for this growing environmental challenge. Plastic waste is a significant
problem due to its long decomposition time and the release of toxic substances into
the environment, leading to harm to ecosystems and wildlife. Traditional methods
of plastic waste management, such as landfilling and incineration, have significant
drawbacks, including high costs, emissions of greenhouse gases, and generation of
hazardous waste.

Plastic pyrolysis offers an alternative approach to address this problem by

converting plastic waste into valuable products, such as pyrolysis oil, charcoal, and
synthetic gas. This not only helps reduce the volume of plastic waste but also
recovers energy and valuable materials from it. In addition, plastic pyrolysis can
help reduce dependence on non-renewable energy sources and provide new
revenue streams for the plastic waste management industry.

The process of plastic pyrolysis involves heating plastic waste in the absence
of oxygen to produce a mixture of valuable products. The temperature and
residence time of the plastic material during pyrolysis are critical factors that affect
the composition and quality of the products produced. Different types of plastic
have varying properties and therefore, their pyrolysis behavior is also different.
Therefore, the selection of the plastic waste feedstock for pyrolysis is an important
factor in determining the yield and quality of the products.
One of the main products of plastic pyrolysis is pyrolysis oil, which is a
valuable resource that can be used as a fuel or feedstock for the chemical industry.
plastic pyrolysis can produce high-quality pyrolysis oil with a calorific value
similar to diesel fuel. This makes it a suitable alternative to fossil fuels and a
potential source of renewable energy. In addition, the oil can be used as a feedstock
for the production of chemicals and fuels, helping to close the loop in the plastic
waste management cycle.

Another product of plastic pyrolysis is charcoal, which has potential

applications in the energy, agriculture, and construction sectors. Charcoal produced
from plastic waste has a higher calorific value compared to traditional charcoal and
can be used as a fuel for heating and cooking. In addition, the charcoal produced
from plastic waste has a higher carbon content, making it suitable for use in the
production of activated carbon, which has a wide range of applications in water
treatment, air purification, and chemical production.
Finally, plastic pyrolysis also produces a synthetic gas that can be used as a
fuel or feedstock for the chemical industry. The synthetic gas produced during
plastic pyrolysis contains a mixture of hydrogen and carbon monoxide, which can
be used as a feedstock for the production of chemicals and fuels.

1.3. Overview of Plastic Pyrolysis:

Plastic pyrolysis is a thermal degradation process that converts plastic waste
into valuable products such as pyrolysis oil, charcoal, and synthetic gas. The
process is carried out under controlled conditions, typically at temperatures 400°C
and 500°C, in the absence of oxygen. During plastic pyrolysis, the plastic waste is
decomposed into its constituent components, including hydrocarbons, carbon
black, and gases.
The plastic pyrolysis process was first developed in the 1970s as a way to
recover energy and valuable materials from waste plastic. In recent years, the
process has gained renewed attention due to the growing global problem of plastic
waste, which is affecting both the environment and human health. Plastic waste is a
persistent and persistent pollutant, and conventional methods of disposal, such as
landfilling and incineration, have limited efficacy and can cause significant
environmental problems.

The importance of plastic pyrolysis lies in its ability to mitigate the negative
impacts of plastic waste on the environment and to recover valuable resources. By
converting plastic waste into usable products, plastic pyrolysis can reduce the
volume of waste that ends up in landfills and the ocean, and it can also help to
conserve non-renewable resources such as oil and gas. Additionally, the process
can generate energy, which can be used to offset the energy requirements of the
pyrolysis process itself.
There are several types of plastic pyrolysis processes, including batch
pyrolysis, continuous pyrolysis, and hybrid pyrolysis. Batch pyrolysis processes
involve the processing of a single batch of plastic waste at a time, while continuous
pyrolysis processes involve the continuous feeding of plastic waste into the reactor.
Hybrid pyrolysis processes combine the features of both batch and continuous
processes. The products of plastic pyrolysis are influenced by several factors,
including the type of plastic, the operating conditions, and the composition of the
feedstock. The most common products of plastic pyrolysis are pyrolysis oil,
charcoal, and synthetic gas. Pyrolysis oil is a dark brown liquid that can be used as
a fuel or as a feedstock for the production of chemicals and other products.
Charcoal is a solid residue that can be used as a fuel, as a soil amendment, or
as a component of activated carbon. Synthetic gas is a mixture of hydrogen, carbon
monoxide, and carbon dioxide that can be used as a fuel or as a feedstock for the
production of chemicals and other products.
The current state of the plastic pyrolysis industry is characterized by a high
degree of innovation and development. A number of companies are developing
new technologies to optimize the plastic pyrolysis process, improve the quality and
yield of the products produced, and reduce the operating costs of the process.
Despite these advances, there are still several challenges facing the development
and commercialization of plastic pyrolysis, including the high costs of the process,
the limited availability of plastic waste, and the lack of standardization in the
industry.

1.4. Types of Plastic:

Plastics are classified into seven types based on their polymer structure and
properties. The seven types of plastics are:
1. Polyethylene Terephthalate (PET or PETE)
2. High-Density Polyethylene (HDPE)
3. Polyvinyl Chloride (PVC)
4. Low-Density Polyethylene (LDPE)
5. Polypropylene (PP)
6. Polystyrene (PS)
7. Other types (includes acrylonitrile butadiene styrene (ABS), polycarbonate (PC),
and more)

Here is a table summarizing the properties of the seven types of plastics.

1.5. Pyrolysis Process:

Pyrolysis is a process that involves the thermal degradation of waste plastics

in the absence of oxygen to produce useful products such as fuel oil, char, and gas.
The process has gained significant attention in recent years as an alternative
solution for plastic waste management, due to the increasing concern about plastic
waste and its impact on the environment.
 The pyrolysis process can be divided into three stages: preheating, thermal
degradation, and cooling. In the preheating stage, the plastic waste is fed into the
reactor and is heated until it reaches the appropriate temperature for thermal
degradation. During the thermal degradation stage, the plastic waste is exposed to
high temperatures, causing it to break down into its constituent chemicals,
including fuel oil, char, and gas. In the cooling stage, the products are cooled and
can be separated and recovered for use.
The temperature and heating rate during the pyrolysis process play a crucial
role in determining the yield and quality of the products produced. High
temperatures, typically in the range of 400°C, are required to break down the
complex polymeric structure of plastics and to maximize the yield of fuel oil. The
heating rate must be carefully controlled to prevent the thermal degradation of the
products and to ensure the safety of the reactor.
The type of plastic being processed can also have a significant impact on the
pyrolysis process. Different types of plastics have different chemical and physical
properties, which can influence the pyrolysis products and their yield. For example,
polyethylene and polypropylene are relatively easy to degrade and have a high
yield of fuel oil, while polyvinyl chloride (PVC) and polystyrene are more difficult
to degrade and produce a lower yield of fuel oil.
The residence time, or the time that the plastic waste is exposed to high
temperatures, is also an important factor in the pyrolysis process. A longer
residence time can increase the yield of fuel oil, but it also increases the risk of
thermal degradation and the formation of by-products such as volatile organic
compounds (VOCs) and dioxins.

There are several different types of pyrolysis processes, including batch

pyrolysis, continuous pyrolysis, and semi-continuous pyrolysis. Batch pyrolysis
involves the processing of a single batch of plastic waste at a time, while
continuous pyrolysis involves the continuous feeding of plastic waste into the
reactor. Semi-continuous pyrolysis is a combination of batch and continuous
pyrolysis, where multiple batches of plastic waste are processed in a continuous
manner.
In addition to the pyrolysis process, there are several other factors that can
impact the yield and quality of the products produced. These include the size and
shape of the reactor, the type and quantity of catalysts used, and the presence of
impurities in the plastic waste.

2)material and method:

2.1. Catalyst zeolite (ZSM-5):

Zeolites are a class of porous, crystalline alumino silicate minerals widely

used as catalysts in the petrochemical and chemical industries. They have a highly
ordered, three-dimensional network structure composed of silicon-oxygen (Si-O)
and aluminum-oxygen (Al-O) tetrahedra. These materials have excellent
properties, such as high surface area, tunable pore sizes, and ion-exchange
capabilities, which make them valuable as catalysts, adsorbents, and
ion-exchangers. One of the most widely studied and applied zeolite catalysts is
ZSM-5, a member of the MFI (Mobil Five) family of zeolites. ZSM-5 is
particularly known for its shape-selective catalytic properties, making it ideal for a
variety of applications particularly in the conversion of hydrocarbons in petroleum
refining and petrochemical processes.

2.1.1. Structure and Composition of ZSM-5 Zeolite

i. Crystalline Structure:

Framework Type ZSM-5 has the MFI framework (Mobil Five), consisting of
a 3D network of SiO₄ and AlO₄tetrahedra. The structure contains channels and
pores that are highly regular

ii. Size-selective:

Pore Size The channels of ZSM-5 are typically about 0.51–0.55 nm in

diameter, which allows it to selectively adsorb molecules with appropriate sizes.
The structure is a series of interconnected straight and sinusoidal channels, which
make it ideal for shape-selective catalysis.

iii) Silica/Alumina Ratio:

ZSM-5 can be synthesized with varying ratios of silicon (Si) to aluminum

(Al), which directly influences its acidity and catalytic properties. Higher silica
content tends to result in lower acidity and reduced catalytic activity, but it
improves thermal stability.

iv) Chemical Composition:

ZSM-5 is typically made by hydrothermal synthesis, where a gel-like

mixture containing sources of silica, alumina, and alkali metals (such as sodium or
potassium) is heated under high pressure to form the crystalline structure.The
framework is primarily composed of silicon oxide (SiO₂) and aluminum oxide
(Al₂O₃). The presence of aluminum in the framework creates Brønsted acidity
(acidic sites that can donate protons), which is critical for catalysis.

2.1.2. Catalytic Properties of ZSM-5:

i. Acidity:

ZSM-5 contains two types of acidic sites, Brønsted and Lewise acidic sites.

Brønsted acid sites: These arise from the aluminum in the framework, where a
proton (H⁺) is associated with an oxygen atom. These sites are critical for
protonation and subsequent reaction of organic molecules in catalytic processes.

Lewis acid sites: These are sites where metal cations (typically from
post-synthesis ion-exchange) act as electron-pair acceptors. Although less
significant than Brønsted sites, Lewis acid sites also play a role in certain reactions,
particularly in reactions involving unsaturated molecules.

The acid strength and density of acid sites can be controlled by adjusting the Si/Al
ratio in the framework. A lower Si/Al ratio increases the density of acidic sites,
making the catalyst more active.

ii. Shape-Selective Catalysis:

ZSM-5 exhibits shape-selectivity, meaning it can preferentially catalyze

reactions for molecules that fit within its pore structure, while blocking larger or
smaller molecules. This is due to its well-defined pore size and structure, making it
effective for isomerization, alkylation, and cracking reactions.
 This property is particularly useful in selective hydrocarbon transformations,
where the catalyst can produce specific products by excluding unwanted reactants
or intermediates from the pores.

iii. Thermal and Hydrothermal Stability:

ZSM-5 is known for its high thermal stability, which makes it suitable for
use in high-temperature catalytic processes such as fluidized-bed reactors and
catalytic cracking units. It also shows good hydrothermal stability, meaning it can
withstand exposure to steam, which is important in processes such as catalytic
reforming and steam cracking.

iv. Applications of ZSM-5 as a Catalyst

ZSM-5 zeolite is primarily used in the petroleum and petrochemical

industries due to its catalytic properties. Some of its major applications include:

⮚ Catalytic Cracking and Hydrocracking

ZSM-5 is used in fluid catalytic cracking (FCC) to convert heavier fractions

of crude oil (such as gas oils) into lighter products, including gasoline and diesel.

Hydrocracking, where ZSM-5 is combined with a hydrogenation

component, is also widely used to upgrade low-quality feedstocks to higher-value
products.

⮚ Methanol-to-Olefins (MTO)
 ZSM-5 plays a crucial role in the Methanol-to-Olefins (MTO) process,
where methanol is converted to olefins such as ethylene and propylene. These
olefins are key building blocks for the petrochemical industry and can be further
polymerized into products like plastics.

The shape-selectivity of ZSM-5 ensures that the conversion is efficient,

producing primarily light olefins while minimizing by-products.

⮚ Isomerization and Aromatization

ZSM-5 is widely used for isomerizing alkanes, particularly in the production

of high-octane gasoline by converting straight-chain alkanes into branched isomers
(which have higher octane ratings). This is crucial for meeting fuel quality
standards.

It is also used in aromatization reactions to convert light hydrocarbons (such

as methane or propane) into valuable aromatic compounds like benzene, toluene,
and xylene, which are used in the chemical industry for producing plastics,
solvents, and other chemicals.

⮚ Alkylation

ZSM-5 catalyzes alkylation reactions, where smaller molecules like olefins

(e.g., propene, butene) are used to alkylate aromatic compounds (e.g., benzene).
This reaction produces high-octane gasoline components or important chemicals
like cumene and ethylbenzene.

⮚ Ammonia-Synthesis and Catalytic Dehydrogenation

 ZSM-5 also plays a role in processes like dehydrogenation (e.g., converting
propane to propylene) and in ammonia synthesis (although less common than other
catalysts like iron and ruthenium).

Modification of ZSM-5:

To enhance or modify the catalytic properties of ZSM-5, it is often treated or

modified through various methods, such as:

a. Ion-exchange

ZSM-5 can be ion-exchanged with various metal cations (such as zinc,

copper, or nickel) to create metal-loaded zeolites. These can enhance specific
catalytic activities, such as hydrogenation, oxidation, or selective dehydrogenation.

b. Dealumination

Dealumination is the process of selectively removing aluminum from the

framework, which results in an increase in the Si/Al ratio. This can reduce the
acidity of the catalyst, improving stability and selectivity in some reactions.

c. Template Removal and Post-synthesis Modification

ZSM-5 can also be modified by removing organic templates used in its

synthesis, adjusting the pore size, or modifying its surface properties, which further
enhances its catalytic performance in specific applications.

2.2. PLASTIC

2.2.1. Virgin plastic:

2.2.1.1. High Density Polyethylene (HDPE)

High-Density Polyethylene is a durable, rigid plastic made from petroleum. It is

known for its high strength-to-density ratio, making it resistant to impact,
chemicals, and environmental stress cracking. Commonly used in products like
bottles, containers, pipes, and plastic bags, HDPE is also lightweight, recyclable,
and has low moisture absorption. It has a melting point around 130°C (266°F) and
is considered safe for food contact in many applications.

2.2.1.2. Linear Low-Density Polyethylene (LLDPE) –

Linear Low-Density Polyethylene is a flexible, tough plastic made from

polymerizing ethylene with small amounts of other co-monomers. It has a lower
density than HDPE, which gives it greater flexibility and strength, especially in
thin-walled applications. LLDPE is commonly used for making plastic films,
stretch wraps, packaging, and containers. It is resistant to chemicals, moisture, and
cracking, and it has good impact strength, making it ideal for use in products that
require flexibility and durability. LLDPE is also recyclable.
2.2.1.3. Polypropylene (PP) - Polypropylene is a versatile, thermoplastic polymer
known for its high strength, rigidity, and chemical resistance. It is lightweight,
durable, and has a high melting point, making it suitable for a wide range of
applications, including packaging, automotive parts, textiles, and medical devices.
PP is resistant to fatigue, moisture, and many solvents, making it ideal for
products that need to withstand stress and wear. It is also recyclable and has a
relatively low environmental impact compared to other plastics.

bb

bb
10b2.2.2. Segregated and unsegregated plastic:

a) Hard plastic b) Soft plastic c) Unsegregated plastic

2.2.3. Daily use plastic:

a) Cheese slices b) Rin powder plastic c) Dev thatta plastic

d) Maggi e) Yippee f) Masala penne

2.2.4. Low-Density Polyethylene (LDPE):

Low Density Polyethylene (LDPE) is a type of plastic made from

polymerizing ethylene gas. It has a simple, flexible structure with branched chains
that give it its low-density properties.

Properties: Flexible, lightweight, low-density, resistant to chemicals and

moisture, and has a low melting point.

1)LDPE-black
LDPE 99.5% and 0.5% black colour LDPE 99% and 1% black colour

2.3. Experimental procedure:

2.3.1. Lab scale reactor (100ml)
 Lab scale reactor is made up of stainless steel (SS316). The capacity of reactor is
100ml. catalyst stand is provided to keep the catalyst a heater is provided to keep
the reactor inside it along with temperature controller. Two thermocouples are
provided to measure the temperature of reaction and heater. Which can be
controlled by temperature controller.

2.3.2. Reaction procedure

Initially 5.0 gm of plastic substrate was loaded into the reactor. 0.1 gm of ZSM-5
catalyst was used for the reaction. The catalyst is placed on the catalyst stand and
kept inside the reactor. The reactor is tightened with the help of nut and bolt. The
reaction was carried out at 400°C temperature. Reaction temperature was set by
using temperature controller. Reaction was carried out for 30 min. After that the
reactor was kept for the cooling, then pyrolysis oil was removed from the reactor
and weigh to calculate the yield of reaction.

2.3.3. Reaction table

The plastic pyrolysis reactions were carried out in 100 mL reactor in presence of
catalyst (Catalytic reactions) and without catalyst (non-catalytic reactions).
Catalytic reactions were carried out using ZSM-5 catalyst at 400°C temperature for
30 min reaction time and non-catalytic reactions were carried out without catalyst
at similar reaction conditions. The data for all the reaction is summarized in table.

Sr.no Substrate RM(gm) Liquid(gm) Solid(gm)

1 LLDPE 5 2.7
-
2 LLDPE(Non Catalytic) 5 2.4
-
3 PP 5 2.8
-
4 Hard Plastic(Catalyst-zsm-5) 5 3.7 -
5 Hard Plastic(non-catalytic) 5 3.5 -
6 Soft Plastic(catalyst-zsm-5) 5 2.6 -
7 Soft Plastic(non- catalyst) 5 2.8 -
8 Unsegregated (Catalyst- 5 - 3.1
zsm-5)
9 Unsegregated(non-catalyst) 5 - 2.8
10 CHEES SLICES 2.14 - 0.86

12 RIN 1.59 0.54

13 DEV THATTA 2.28 - 1.43

14 MAGGI 2.3 - 0.63

15 YIPPEE 3.78 - 1.59

16 MASALA PENNE 3.28 1.60

-
17 LDPE/BLACK [LDPE 99.5% and 5 3.4
0.5% black colour]
18 LDPE/BLACK [LDPE 99% & 5 2.8
1% black colour]
3. Result & discussion:

3.1. GC analysis:

GC analysis of the pyrolysis oil was done to understand which components

are present in the oil.

For the GC analysis, 1ml of pyrolysis oil was diluted with the 1 ml of decade as
internal solvent in the proportional of 1:1. This diluted sample was passed through
0.22um GC filter to avoid the contamination. After that the sample was placed for
the analysis with oven temperature was 280°C. The detector temperature was
270°C and the injector temperature was 300°C. The analysis was carried out for 72
minutes and the results were integrated with the help of standards.
3.2. GC analysis of plastic pyrolysis oil:

LLDPE (non-catalytic):

After the pyrolysis of LLDPE, it gives mixture of hydrocarbons like

alkene and alkane. Analysis of these obtained hydrocarbons was done
and from GC profile it was confirmed that the obtained hydrocarbon oil
contains C7 to C21 hydrocarbons.
Rin plastic:

Pyrolysis of Rin plastic gives mixture of hydrocarbons alkene and

alkane as be confirm GC analysis that C8 to C20 hydrocarbons is form
as we confirm.

LDPE-black (LDPE 99.5% and 0.5% black):

Pyrolysis of LDPE-BLACK gives mixture of hydrocarbons alkene and

alkane as be confirm GC analysis that C8 to C20 hydrocarbons is form
as we confirm.
4. Conclusion:
We have prepared pyrolysis oil which contains mixture of hydrocarbons,
aromatic compounds, oxygenated compound and other value added
chemicals and also formation of gas, methane, ethane and ethylene from
the waste plastic and from commercial plastic we got very good yield of
oil by using a ZSM -5 catalyst. Further study has to be needed.

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