Octane Number and Cetane Number Notes | Engineering Chemistry | RGPV BTech First Year
Octane Number and Cetane Number Notes | Engineering Chemistry | RGPV BTech First Year
Octane Number and Cetane Number
Engineering Chemistry рдореЗрдВ Liquid Fuels рдХреА Quality рдХреЛ рдорд╛рдкрдиреЗ рдХреЗ рд▓рд┐рдП Octane Number рддрдерд╛ Cetane Number рдХрд╛ рдЙрдкрдпреЛрдЧ рдХрд┐рдпрд╛ рдЬрд╛рддрд╛ рд╣реИред Octane Number Petrol рдХреА Anti-Knocking Property рдХреЛ рджрд░реНрд╢рд╛рддрд╛ рд╣реИ рдЬрдмрдХрд┐ Cetane Number Diesel Fuel рдХреА Ignition Quality рдХреЛ рд╡реНрдпрдХреНрдд рдХрд░рддрд╛ рд╣реИред Automobile Engineering, Fuel Technology рддрдерд╛ Internal Combustion Engines рдореЗрдВ рдЗрди рджреЛрдиреЛрдВ Parameters рдХрд╛ рдЕрддреНрдпрдзрд┐рдХ рдорд╣рддреНрд╡ рд╣реИред
ЁЯФ╣ Knocking рдХреНрдпрд╛ рд╣реИ?
Internal Combustion Engine рдореЗрдВ Fuel-Air Mixture рдХреЗ рдЕрд╕рд╛рдорд╛рдиреНрдп рдПрд╡рдВ рдЕрдирд┐рдпрдВрддреНрд░рд┐рдд рджрд╣рди рдХреЗ рдХрд╛рд░рдг рдЙрддреНрдкрдиреНрди рдзрд╛рддреНрд╡рд┐рдХ рдЖрд╡рд╛рдЬ рдХреЛ Knocking рдХрд╣рддреЗ рд╣реИрдВред
Knocking Engine Efficiency рдХреЛ рдХрдо рдХрд░рддрд╛ рд╣реИ рддрдерд╛ Engine Parts рдХреЛ рдиреБрдХрд╕рд╛рди рдкрд╣реБрдВрдЪрд╛рддрд╛ рд╣реИред
ЁЯФ╣ Octane Number рдХреНрдпрд╛ рд╣реИ?
Octane Number Petrol Fuel рдХреА Anti-Knocking Quality рдХрд╛ рдорд╛рдк рд╣реИред
рдпрд╣ рдмрддрд╛рддрд╛ рд╣реИ рдХрд┐ Petrol Fuel Spark Ignition Engine рдореЗрдВ Knocking рдХрд╛ рдХрд┐рддрдирд╛ рдкреНрд░рддрд┐рд░реЛрдз рдХрд░рддрд╛ рд╣реИред
ЁЯФ╣ Definition of Octane Number
"Octane Number is the percentage by volume of Iso-Octane present in a mixture of Iso-Octane and n-Heptane having the same knocking characteristics as the fuel under test."
ЁЯФ╣ Reference Fuels for Octane Number
| Reference Fuel | Octane Value |
|---|---|
| Iso-Octane | 100 |
| n-Heptane | 0 |
ЁЯФ╣ Example of Octane Number
рдпрджрд┐ рдХрд┐рд╕реА Petrol рдХрд╛ Octane Number 80 рд╣реИ, рддреЛ рдЙрд╕рдХреА Anti-Knocking Property 80% Iso-Octane рддрдерд╛ 20% n-Heptane рдХреЗ рдорд┐рд╢реНрд░рдг рдХреЗ рдмрд░рд╛рдмрд░ рд╣реЛрдЧреАред
ЁЯФ╣ Importance of Octane Number
- Indicates Fuel Quality
- Measures Anti-Knocking Property
- Improves Engine Efficiency
- Prevents Engine Damage
- Enhances Performance
ЁЯФ╣ Factors Affecting Octane Number
- Molecular Structure
- Branching of Hydrocarbons
- Aromatic Content
- Additives Used
- Fuel Composition
ЁЯФ╣ Anti-Knocking Agents
Octane Number рдмрдврд╝рд╛рдиреЗ рдХреЗ рд▓рд┐рдП Anti-Knocking Compounds рдорд┐рд▓рд╛рдП рдЬрд╛рддреЗ рд╣реИрдВред
Examples
- Tetra Ethyl Lead (TEL)
- Ethanol
- MTBE
- Toluene
ЁЯФ╣ Cetane Number рдХреНрдпрд╛ рд╣реИ?
Cetane Number Diesel Fuel рдХреА Ignition Quality рдХрд╛ рдорд╛рдк рд╣реИред
рдпрд╣ рдмрддрд╛рддрд╛ рд╣реИ рдХрд┐ Diesel Fuel Compression Ignition Engine рдореЗрдВ рдХрд┐рддрдиреА рдЖрд╕рд╛рдиреА рд╕реЗ Ignite рд╣реЛрддрд╛ рд╣реИред
ЁЯФ╣ Definition of Cetane Number
"Cetane Number is the percentage by volume of Cetane present in a mixture of Cetane and Alpha-Methyl Naphthalene having the same ignition characteristics as the diesel fuel under test."
ЁЯФ╣ Reference Fuels for Cetane Number
| Reference Fuel | Cetane Value |
|---|---|
| Cetane (n-Hexadecane) | 100 |
| Alpha-Methyl Naphthalene | 0 |
ЁЯФ╣ Example of Cetane Number
рдпрджрд┐ рдХрд┐рд╕реА Diesel Fuel рдХрд╛ Cetane Number 60 рд╣реИ, рддреЛ рдЙрд╕рдХреА Ignition Quality 60% Cetane рддрдерд╛ 40% Alpha-Methyl Naphthalene рдХреЗ рдорд┐рд╢реНрд░рдг рдХреЗ рд╕рдорд╛рди рд╣реЛрдЧреАред
ЁЯФ╣ Importance of Cetane Number
- Easy Engine Starting
- Smooth Combustion
- Reduced Ignition Delay
- Better Engine Performance
- Lower Noise Level
ЁЯФ╣ Factors Affecting Cetane Number
- Hydrocarbon Structure
- Straight Chain Compounds
- Fuel Purity
- Additives
- Engine Conditions
ЁЯФ╣ Cetane Improvers
- Amyl Nitrate
- Ethyl Nitrate
- Alkyl Nitrates
ЁЯФ╣ Difference Between Octane Number and Cetane Number
| Basis | Octane Number | Cetane Number |
|---|---|---|
| Fuel Type | Petrol | Diesel |
| Indicates | Anti-Knocking Property | Ignition Quality |
| Engine Type | Spark Ignition Engine | Compression Ignition Engine |
| Reference Fuel | Iso-Octane | Cetane |
| Desired Value | High | High |
ЁЯФ╣ Characteristics of Good Fuel
| Fuel | Required Property |
|---|---|
| Petrol | High Octane Number |
| Diesel | High Cetane Number |
ЁЯФ╣ Applications
- Automobile Industry
- Petroleum Industry
- Fuel Testing Laboratories
- Engine Design
- Power Generation Systems
ЁЯФ╣ Industrial Importance
Petroleum Refineries Fuel Quality Control рдХреЗ рд▓рд┐рдП Octane Number рддрдерд╛ Cetane Number рдХрд╛ рдЙрдкрдпреЛрдЧ рдХрд░рддреА рд╣реИрдВред рдЖрдзреБрдирд┐рдХ Engines рдХреА Performance рдПрд╡рдВ Fuel Economy рдЗрди Parameters рдкрд░ рдирд┐рд░реНрднрд░ рдХрд░рддреА рд╣реИред
ЁЯФ╣ Viva Questions
- Octane Number рдХреНрдпрд╛ рд╣реИ?
- Cetane Number рдХреНрдпрд╛ рд╣реИ?
- Iso-Octane рдХрд╛ Octane Number рдХрд┐рддрдирд╛ рд╣реЛрддрд╛ рд╣реИ?
- Cetane Number рдХрд┐рд╕ Fuel рдХреЗ рд▓рд┐рдП рдЙрдкрдпреЛрдЧ рдХрд┐рдпрд╛ рдЬрд╛рддрд╛ рд╣реИ?
- Octane Number рддрдерд╛ Cetane Number рдореЗрдВ рдЕрдВрддрд░ рд▓рд┐рдЦрд┐рдПред
ЁЯФ╣ Exam Oriented Important Questions
- Octane Number рдХреЛ рдкрд░рд┐рднрд╛рд╖рд┐рдд рдХреАрдЬрд┐рдПред
- Cetane Number рдХреНрдпрд╛ рд╣реИ? рд╕рдордЭрд╛рдЗрдПред
- Octane Number рддрдерд╛ Cetane Number рдореЗрдВ рдЕрдВрддрд░ рд▓рд┐рдЦрд┐рдПред
- Anti-Knocking Agents рдХрд╛ рд╡рд░реНрдгрди рдХреАрдЬрд┐рдПред
- Diesel Fuel рдореЗрдВ Cetane Number рдХрд╛ рдорд╣рддреНрд╡ рд╕рдордЭрд╛рдЗрдПред
ЁЯФ╣ Conclusion
Octane Number Petrol Fuel рдХреА Anti-Knocking Quality рдХрд╛ рдорд╛рдк рд╣реИ рдЬрдмрдХрд┐ Cetane Number Diesel Fuel рдХреА Ignition Quality рдХреЛ рджрд░реНрд╢рд╛рддрд╛ рд╣реИред рджреЛрдиреЛрдВ Parameters Fuel Performance, Engine Efficiency рддрдерд╛ Fuel Quality Assessment рдХреЗ рд▓рд┐рдП рдЕрддреНрдпрдВрдд рдорд╣рддреНрд╡рдкреВрд░реНрдг рд╣реИрдВред
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