presentation pyrolysis

Download Presentation pyrolysis

Post on 18-Dec-2014

674 views

Category:

Technology

3 download

Embed Size (px)

DESCRIPTION

Group Presentation, Degree, UiTM S.A

TRANSCRIPT

  • 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. PROS N CONS 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 (O) 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 Its 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