Liquid Fuels Notes | Petroleum, Petrol and Diesel | Engineering Chemistry | RGPV BTech First Year
Liquid Fuels (द्रव ईंधन)
Engineering Chemistry में Liquid Fuels का अत्यंत महत्वपूर्ण स्थान है। आधुनिक Transportation Systems, Automobile Engines, Aircraft, Power Plants तथा Industrial Furnaces में मुख्य रूप से Liquid Fuels का उपयोग किया जाता है। Solid Fuels की तुलना में Liquid Fuels अधिक सुविधाजनक, अधिक Calorific Value वाले तथा अधिक Efficient होते हैं।
🔹 Liquid Fuel क्या है?
वे Fuels जो सामान्य तापमान एवं दाब पर द्रव (Liquid) अवस्था में होते हैं, Liquid Fuels कहलाते हैं।
इनका उपयोग Heat Energy तथा Mechanical Power प्राप्त करने के लिए किया जाता है।
🔹 Definition of Liquid Fuel
"Liquid fuels are combustible substances available in liquid state which produce heat energy on combustion."
🔹 Characteristics of an Ideal Liquid Fuel
- High Calorific Value
- Low Moisture Content
- Low Ash Content
- Easy Ignition
- Clean Combustion
- Easy Transportation
- Safe Storage
- Low Pollution
🔹 Classification of Liquid Fuels
1. Natural Liquid Fuels
- Petroleum (Crude Oil)
2. Artificial Liquid Fuels
- Petrol
- Diesel
- Kerosene
- Fuel Oil
- Synthetic Fuels
🔹 Petroleum (Crude Oil)
Petroleum एक प्राकृतिक Liquid Fuel है जो पृथ्वी की सतह के नीचे पाया जाता है।
यह Hydrocarbons का जटिल मिश्रण होता है जिसमें Carbon तथा Hydrogen मुख्य तत्व होते हैं।
🔹 Composition of Petroleum
| Component | Approximate Percentage |
|---|---|
| Carbon | 83 - 87% |
| Hydrogen | 10 - 14% |
| Sulphur | 0.1 - 5% |
| Nitrogen | 0.1 - 2% |
| Oxygen | Trace Amount |
🔹 Refining of Petroleum
Crude Oil को सीधे उपयोग नहीं किया जा सकता। इसे Fractional Distillation द्वारा विभिन्न उपयोगी Fractions में विभाजित किया जाता है।
🔹 Fractional Distillation of Petroleum
Fractional Distillation Tower में Crude Oil को गर्म किया जाता है और विभिन्न Boiling Point वाले Fractions अलग किए जाते हैं।
| Fraction | Boiling Range | Uses |
|---|---|---|
| Petroleum Gas | Below 40°C | LPG |
| Petrol | 40-120°C | Motor Fuel |
| Naphtha | 120-180°C | Petrochemical Industry |
| Kerosene | 180-250°C | Lighting Fuel |
| Diesel | 250-350°C | Diesel Engines |
| Lubricating Oil | 350-400°C | Lubrication |
| Residue | Above 400°C | Bitumen |
🔹 Petrol (Gasoline)
Petrol Petroleum Refining से प्राप्त एक महत्वपूर्ण Liquid Fuel है जिसका उपयोग Spark Ignition Engines में किया जाता है।
Properties of Petrol
- High Volatility
- Easy Ignition
- High Calorific Value
- Low Viscosity
- Clean Burning
Applications
- Motor Cars
- Motorcycles
- Small Aircraft
- Generators
🔹 Diesel
Diesel Petroleum का एक Heavy Fraction है जिसका उपयोग Compression Ignition Engines में किया जाता है।
Properties of Diesel
- Higher Density
- Higher Flash Point
- Good Fuel Efficiency
- High Energy Output
Applications
- Trucks
- Buses
- Locomotives
- Power Generators
- Agricultural Machinery
🔹 Advantages of Liquid Fuels
- Higher Calorific Value
- Easy Transportation
- Easy Storage
- Clean Combustion
- Better Combustion Control
- Less Ash Formation
🔹 Disadvantages of Liquid Fuels
- High Cost
- Fire Hazard
- Environmental Pollution
- Storage Tank Requirement
- Limited Natural Resources
🔹 Comparison Between Solid and Liquid Fuels
| Property | Solid Fuel | Liquid Fuel |
|---|---|---|
| Calorific Value | Lower | Higher |
| Ash Formation | High | Low |
| Combustion Control | Difficult | Easy |
| Transportation | Difficult | Easy |
| Efficiency | Moderate | High |
🔹 Industrial Applications
- Automobile Industry
- Aircraft Industry
- Power Generation
- Marine Transportation
- Chemical Industries
- Petrochemical Plants
🔹 Viva Questions
- Liquid Fuel क्या है?
- Petroleum क्या है?
- Fractional Distillation क्या है?
- Petrol और Diesel में अंतर लिखिए।
- Liquid Fuels के लाभ लिखिए।
🔹 Exam Oriented Important Questions
- Liquid Fuels का वर्गीकरण कीजिए।
- Petroleum Refining को समझाइए।
- Fractional Distillation of Petroleum का वर्णन कीजिए।
- Petrol एवं Diesel के गुण एवं उपयोग लिखिए।
- Solid Fuel एवं Liquid Fuel में अंतर लिखिए।
🔹 Conclusion
Liquid Fuels आधुनिक परिवहन एवं औद्योगिक विकास का आधार हैं। Petroleum से प्राप्त Petrol, Diesel तथा अन्य Fractions विभिन्न Industrial एवं Commercial Applications में उपयोग किए जाते हैं। उनकी उच्च Calorific Value तथा बेहतर Combustion Characteristics के कारण इनका व्यापक उपयोग होता है।
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