Gaseous Fuels Notes | LPG, CNG, Producer Gas and Water Gas | Engineering Chemistry | RGPV BTech First Year

Gaseous Fuels (गैसीय ईंधन)

Engineering Chemistry में Gaseous Fuels को सबसे स्वच्छ एवं उच्च दक्षता वाले Fuels माना जाता है। आधुनिक Industries, Domestic Applications, Power Generation तथा Transportation Sector में Gaseous Fuels का व्यापक उपयोग किया जाता है। Solid तथा Liquid Fuels की तुलना में Gaseous Fuels अधिक Uniform Combustion, Better Heat Control तथा Low Pollution प्रदान करते हैं।

🔹 Gaseous Fuel क्या है?

वे Fuels जो सामान्य परिस्थितियों में गैस अवस्था में पाए जाते हैं तथा Combustion के दौरान Heat Energy उत्पन्न करते हैं, Gaseous Fuels कहलाते हैं।

🔹 Definition of Gaseous Fuel

"Gaseous fuels are combustible gases which produce heat energy upon combustion."

🔹 Characteristics of an Ideal Gaseous Fuel

High Calorific Value
Clean Combustion
Easy Ignition
Low Pollution
Uniform Heating
Easy Control of Flame
No Ash Formation
High Thermal Efficiency

🔹 Classification of Gaseous Fuels

1. Natural Gaseous Fuels

Natural Gas
CNG (Compressed Natural Gas)

2. Artificial Gaseous Fuels

LPG
Producer Gas
Water Gas
Coal Gas
Biogas

🔹 Natural Gas

Natural Gas पृथ्वी के अंदर Petroleum Deposits के साथ पाई जाती है। इसका मुख्य घटक Methane (CH₄) होता है।

Composition of Natural Gas

Component	Percentage
Methane (CH₄)	80-95%
Ethane (C₂H₆)	2-10%
Propane (C₃H₈)	1-5%
Butane (C₄H₁₀)	Trace

🔹 CNG (Compressed Natural Gas)

CNG, Natural Gas का Compressed Form है जिसे High Pressure पर संग्रहित किया जाता है।

Advantages of CNG

Eco-Friendly Fuel
Low Pollution
High Octane Number
Economical Fuel
Clean Combustion

Applications

Cars
Buses
Auto Rickshaws
Commercial Vehicles

🔹 LPG (Liquefied Petroleum Gas)

LPG एक महत्वपूर्ण Commercial Fuel है जो मुख्य रूप से Propane तथा Butane का मिश्रण होता है।

Composition of LPG

Propane (C₃H₈)
Butane (C₄H₁₀)

Properties of LPG

High Calorific Value
Smokeless Fuel
Easy Storage
Clean Burning

Applications

Domestic Cooking
Industrial Heating
Hotels and Restaurants

🔹 Producer Gas

Producer Gas एक Artificial Gaseous Fuel है जो Red Hot Coke अथवा Coal पर सीमित मात्रा में Air प्रवाहित करके प्राप्त किया जाता है।

Manufacture of Producer Gas

Reaction:

2C + O₂ → 2CO

C + O₂ → CO₂

CO₂ + C → 2CO

Composition of Producer Gas

Gas	Approximate Percentage
CO	25-30%
N₂	50-60%
H₂	10-15%
CO₂	3-5%

Uses of Producer Gas

Industrial Furnaces
Glass Industry
Steel Industry

🔹 Water Gas

Water Gas एक महत्वपूर्ण Industrial Fuel है जो Red Hot Coke पर Steam प्रवाहित करके प्राप्त किया जाता है।

Manufacture of Water Gas

Reaction:

C + H₂O → CO + H₂

यह Reaction Endothermic होती है।

Composition of Water Gas

Gas	Percentage
CO	50%
H₂	50%

Uses of Water Gas

Synthesis of Chemicals
Industrial Heating
Hydrogen Production

🔹 Difference Between Producer Gas and Water Gas

Basis	Producer Gas	Water Gas
Raw Material	Air + Coke	Steam + Coke
Main Components	CO + N₂	CO + H₂
Calorific Value	Low	High
Heating Value	Lower	Higher

🔹 Advantages of Gaseous Fuels

Complete Combustion
No Ash Formation
Easy Transportation through Pipelines
High Efficiency
Low Maintenance Cost
Better Temperature Control

🔹 Disadvantages of Gaseous Fuels

Storage Difficulty
Explosion Risk
Special Equipment Required
Pipeline Infrastructure Needed

🔹 Comparison of Fuels

Property	Solid Fuel	Liquid Fuel	Gaseous Fuel
Efficiency	Low	Moderate	High
Combustion	Poor	Good	Excellent
Pollution	High	Moderate	Low
Ash Formation	High	Low	Nil

🔹 Industrial Applications

Power Plants
Chemical Industries
Steel Industries
Domestic Cooking
Automobile Sector
Furnace Heating

🔹 Viva Questions

Gaseous Fuel क्या है?
CNG का Full Form क्या है?
LPG की Composition क्या है?
Producer Gas कैसे बनती है?
Water Gas क्या है?

🔹 Exam Oriented Important Questions

Gaseous Fuels का वर्गीकरण कीजिए।
LPG तथा CNG का वर्णन कीजिए।
Producer Gas के निर्माण एवं उपयोग लिखिए।
Water Gas के निर्माण की प्रक्रिया समझाइए।
Producer Gas तथा Water Gas में अंतर लिखिए।

🔹 Conclusion

Gaseous Fuels आधुनिक ऊर्जा प्रणालियों में अत्यंत महत्वपूर्ण भूमिका निभाते हैं। LPG, CNG, Producer Gas तथा Water Gas जैसे Fuels उच्च दक्षता, कम प्रदूषण तथा बेहतर Combustion Characteristics प्रदान करते हैं। इसलिए Industrial एवं Domestic Applications में इनका उपयोग लगातार बढ़ रहा है।

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