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Pyrolysis, Mohamad Saifullah Bin Abd Hamid 2017632158 Eh2208B - Coggle…
Pyrolysis
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Definition
- Thermal decomposition through the application of intense, indirect heat in the absence of oxygen.
- Waste material is reduced to synthetic gas (syngas), bio-oil and non-hazardous carbon char (biochar).
- When pyrolysis takes place in the presence of water, it is called hydrous pyrolysis.
Process
- The pyrolysis process consists of both simultaneous and successive reactions when organic material is heated in a non-reactive atmosphere.
- Long chains of carbon, hydrogen and oxygen compounds in biomass break down into smaller molecules in the form of gases, condensable vapours (tars and oils) and solid charcoal under pyrolysis conditions.
Types of pyrolysis
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- Temperature 300 - 500 celcius
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Uses
Bio-char
- As coal replacement in certain combustion process
- It is highly absorbent and therefore increases the soil’s ability to retain water, nutrients and agricultural chemicals, preventing water contamination and soil erosion
Syn-gas
- Has around half of the energy of natural gas,so it can be used as a fuel to generate electricity or steam.
- Immediate combustion of the syngas eliminates most of the noxious elements, resulting in clean emissions.
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