Presentation pyrolysis

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Presentation pyrolysis

  1. 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. 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. 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. 4. WHAT IS PYROLYSIS? Pyrolysis is : AS223 - B.Sc (Hons) Polymer Technology
  5. 5. WHAT IS PYROLYSIS? Pyrolysis is : How? WHAT IS PYROLYSIS? AS223 - B.Sc (Hons) Polymer Technology
  6. 6. WHAT IS PYROLYSIS? Pyrolysis is : WHAT IS PYROLYSIS? AS223 - B.Sc (Hons) Polymer Technology
  7. 7. WHAT IS PYROLYSIS? Pyrolysis is : WHAT IS PYROLYSIS? AS223 - B.Sc (Hons) Polymer Technology
  8. 8. WHAT IS PYROLYSIS? Pyrolysis is : WHAT IS PYROLYSIS? AS223 - B.Sc (Hons) Polymer Technology
  9. 9. WHAT IS PYROLYSIS? Pyrolysis is : WHAT IS PYROLYSIS? AS223 - B.Sc (Hons) Polymer Technology
  10. 10. WHAT IS PYROLYSIS?PRODUCT of PYROLYSIS Bio Oil Char SynGas AS223 - B.Sc (Hons) Polymer Technology
  11. 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. 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. 13. TYPES OF PYROLYSIS • Dry pyrolysis  Low Temperature Analysis  MediumTemperature Analysis  High Temperature Analysis • Oxidizing pyrolysis AS223 - B.Sc (Hons) Polymer Technology
  14. 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. 15. AS223 - B.Sc (Hons) Polymer Technology
  16. 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. 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. 18. AS223 - B.Sc (Hons) Polymer Technology

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