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PYROLYSIS
Prepared by :
Afizah Abd Aziz
Izza Nadhira Zaidin
Ahmad Asyraf Abd Majid
Mohd Khairul Firdaus
Mohd Naqiuddin Aziz Affendi
AS223 - B.Sc (Hons) Polymer Technology
DEFINITION
thermal decomposition
of organic material at
elevated temperatures
in the absence of
oxygen
Involves chemical
change of chemical
composition and
physical phase
IrreversibleEndothermic
AS223 - B.Sc (Hons) Polymer Technology
WHAT IS PYROLYSIS?
 Pyrolysis does not involve reactions with
oxygen, water, or any other reagents.
 In practice, it is not possible to achieve a
completely oxygen-free atmosphere.
 Because some oxygen is present in any
pyrolysis system, a small amount of
oxidation occurs.
AS223 - B.Sc (Hons) Polymer Technology
WHAT IS PYROLYSIS?
Pyrolysis is :
AS223 - B.Sc (Hons) Polymer Technology
WHAT IS PYROLYSIS?
Pyrolysis is :
How?
WHAT IS PYROLYSIS?
AS223 - B.Sc (Hons) Polymer Technology
WHAT IS PYROLYSIS?
Pyrolysis is :
WHAT IS PYROLYSIS?
AS223 - B.Sc (Hons) Polymer Technology
WHAT IS PYROLYSIS?
Pyrolysis is :
WHAT IS PYROLYSIS?
AS223 - B.Sc (Hons) Polymer Technology
WHAT IS PYROLYSIS?
Pyrolysis is :
WHAT IS PYROLYSIS?
AS223 - B.Sc (Hons) Polymer Technology
WHAT IS PYROLYSIS?
Pyrolysis is :
WHAT IS PYROLYSIS?
AS223 - B.Sc (Hons) Polymer Technology
WHAT IS PYROLYSIS?PRODUCT of PYROLYSIS
Bio Oil
Char
SynGas
AS223 - B.Sc (Hons) Polymer Technology
PROCESS
 operating temperatures above 430 °C
(806 °F).
 For agricultural waste, for example, typical
temperatures are 450 to 550 °C (840 to
1,000 °F).
AS223 - B.Sc (Hons) Polymer Technology
PRO’S N CON’S
 Cheap and
economical system
 Environment-
friendly,
 Energy-efficient
 Requires drying of soil
 Ineffective in
destroying or
physically separating
inorganics from the
contaminated
medium.
 Requiring proper
treatment, storage,
and disposal for
hazardous wastes.
AS223 - B.Sc (Hons) Polymer Technology
TYPES OF PYROLYSIS
• Dry pyrolysis
 Low Temperature Analysis
 MediumTemperature Analysis
 High Temperature Analysis
• Oxidizing pyrolysis
AS223 - B.Sc (Hons) Polymer Technology
Dry Pyrolysis
 Process of thermal decomposition without
access of oxygen (O₂)
 Product of dry pyrolysis are gas with high heat
of combustion, liquid and solid carbon residue.
 Type of dry pyrolysis depend on the
temperature of the process.
AS223 - B.Sc (Hons) Polymer Technology
AS223 - B.Sc (Hons) Polymer Technology
Oxidizing Pyrolysis
 It’s impossible to achieve a completely
oxygen-free atmosphere.
 Thus, a small amount of oxidation occurs.
If volatile or semi-volatile materials are
present in the waste, thermal
desorption will also occur.
AS223 - B.Sc (Hons) Polymer Technology
Oxidizing Pyrolysis
 Thermal decomposition of industrial waste by
its partial burning or direct contact with end
product of fuel combustion
 This method is used for neutralization of most
wastes including “inconvenient” ones for
burning
AS223 - B.Sc (Hons) Polymer Technology
AS223 - B.Sc (Hons) Polymer Technology

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Presentation pyrolysis

  • 1. PYROLYSIS Prepared by : Afizah Abd Aziz Izza Nadhira Zaidin Ahmad Asyraf Abd Majid Mohd Khairul Firdaus Mohd Naqiuddin Aziz Affendi AS223 - B.Sc (Hons) Polymer Technology
  • 2. DEFINITION thermal decomposition of organic material at elevated temperatures in the absence of oxygen Involves chemical change of chemical composition and physical phase IrreversibleEndothermic AS223 - B.Sc (Hons) Polymer Technology
  • 3. WHAT IS PYROLYSIS?  Pyrolysis does not involve reactions with oxygen, water, or any other reagents.  In practice, it is not possible to achieve a completely oxygen-free atmosphere.  Because some oxygen is present in any pyrolysis system, a small amount of oxidation occurs. AS223 - B.Sc (Hons) Polymer Technology
  • 4. WHAT IS PYROLYSIS? Pyrolysis is : AS223 - B.Sc (Hons) Polymer Technology
  • 5. WHAT IS PYROLYSIS? Pyrolysis is : How? WHAT IS PYROLYSIS? AS223 - B.Sc (Hons) Polymer Technology
  • 6. WHAT IS PYROLYSIS? Pyrolysis is : WHAT IS PYROLYSIS? AS223 - B.Sc (Hons) Polymer Technology
  • 7. WHAT IS PYROLYSIS? Pyrolysis is : WHAT IS PYROLYSIS? AS223 - B.Sc (Hons) Polymer Technology
  • 8. WHAT IS PYROLYSIS? Pyrolysis is : WHAT IS PYROLYSIS? AS223 - B.Sc (Hons) Polymer Technology
  • 9. WHAT IS PYROLYSIS? Pyrolysis is : WHAT IS PYROLYSIS? AS223 - B.Sc (Hons) Polymer Technology
  • 10. WHAT IS PYROLYSIS?PRODUCT of PYROLYSIS Bio Oil Char SynGas AS223 - B.Sc (Hons) Polymer Technology
  • 11. PROCESS  operating temperatures above 430 °C (806 °F).  For agricultural waste, for example, typical temperatures are 450 to 550 °C (840 to 1,000 °F). AS223 - B.Sc (Hons) Polymer Technology
  • 12. PRO’S N CON’S  Cheap and economical system  Environment- friendly,  Energy-efficient  Requires drying of soil  Ineffective in destroying or physically separating inorganics from the contaminated medium.  Requiring proper treatment, storage, and disposal for hazardous wastes. AS223 - B.Sc (Hons) Polymer Technology
  • 13. TYPES OF PYROLYSIS • Dry pyrolysis  Low Temperature Analysis  MediumTemperature Analysis  High Temperature Analysis • Oxidizing pyrolysis AS223 - B.Sc (Hons) Polymer Technology
  • 14. Dry Pyrolysis  Process of thermal decomposition without access of oxygen (O₂)  Product of dry pyrolysis are gas with high heat of combustion, liquid and solid carbon residue.  Type of dry pyrolysis depend on the temperature of the process. AS223 - B.Sc (Hons) Polymer Technology
  • 15. AS223 - B.Sc (Hons) Polymer Technology
  • 16. Oxidizing Pyrolysis  It’s impossible to achieve a completely oxygen-free atmosphere.  Thus, a small amount of oxidation occurs. If volatile or semi-volatile materials are present in the waste, thermal desorption will also occur. AS223 - B.Sc (Hons) Polymer Technology
  • 17. Oxidizing Pyrolysis  Thermal decomposition of industrial waste by its partial burning or direct contact with end product of fuel combustion  This method is used for neutralization of most wastes including “inconvenient” ones for burning AS223 - B.Sc (Hons) Polymer Technology
  • 18. AS223 - B.Sc (Hons) Polymer Technology