Liquefied Petroleum Gas vs. Compressed Natural Gas: Know the Difference
By Shumaila Saeed || Published on February 28, 2024
Liquefied Petroleum Gas (LPG) is a portable, clean-burning fossil fuel derived from crude oil and natural gas processing, whereas Compressed Natural Gas (CNG) is natural gas under high pressure, used mainly as a cleaner alternative to other fossil fuels.
Key Differences
Liquefied Petroleum Gas, commonly known as LPG, is primarily composed of propane and butane. Compressed Natural Gas, or CNG, mainly consists of methane, compressed to less than 1% of its volume at standard atmospheric pressure.
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Feb 28, 2024
LPG is obtained during natural gas processing and oil refining and is stored in liquid form under moderate pressure. In contrast, CNG is stored under high pressure, which keeps it in a gaseous state.
Shumaila Saeed
Feb 28, 2024
LPG is known for its versatility and portability, making it popular for heating, cooking, and automotive use. CNG, being less dense than air, is safer in case of a leak and is widely used in transportation due to its low environmental impact.
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Feb 28, 2024
In terms of energy efficiency, LPG has a higher calorific value per unit volume than CNG. However, CNG's lower emissions make it a more environmentally friendly option.
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Feb 28, 2024
LPG requires a relatively simple infrastructure for storage and distribution, whereas CNG requires a more complex infrastructure due to its high-pressure storage requirements.
Shumaila Saeed
Feb 28, 2024
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Comparison Chart
Storage Form
Stored in liquid form under pressure
Stored in gaseous form under high pressure
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Energy Efficiency
Higher calorific value per unit volume
Lower calorific value per unit volume
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Feb 28, 2024
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Liquefied Petroleum Gas and Compressed Natural Gas Definitions
Liquefied Petroleum Gas
LPG is versatile for both domestic and industrial use.
LPG heaters are common in households.
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Jan 11, 2024
Compressed Natural Gas
CNG is environmentally friendly due to lower emissions.
CNG vehicles contribute to cleaner air.
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Jan 11, 2024
Liquefied Petroleum Gas
LPG is a clean-burning fossil fuel used for cooking and heating.
Our camping stove uses LPG for cooking.
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Jan 11, 2024
Compressed Natural Gas
CNG is used primarily in transportation.
Many auto rickshaws run on CNG.
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Liquefied Petroleum Gas
LPG is derived from natural gas processing and petroleum refining.
The refinery produces large quantities of LPG.
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Jan 11, 2024
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Compressed Natural Gas
CNG requires high-pressure storage systems.
Special cylinders are used to store CNG.
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Jan 11, 2024
Liquefied Petroleum Gas
LPG is stored and transported in liquid form.
The LPG tank needs to be refilled for the grill.
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Jan 11, 2024
Compressed Natural Gas
CNG is a clean alternative to gasoline and diesel.
The city's buses have switched to CNG.
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Jan 11, 2024
Liquefied Petroleum Gas
LPG is an efficient fuel for vehicles.
Many taxis in the city run on LPG.
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Jan 11, 2024
Compressed Natural Gas
CNG is natural gas compressed for use as fuel.
The new filling station offers CNG.
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Jan 11, 2024
Repeatedly Asked Queries
What is Liquefied Petroleum Gas?
A portable fossil fuel mainly comprising propane and butane.
Shumaila Saeed
Feb 28, 2024
What is Compressed Natural Gas?
Methane stored under high pressure for use as fuel.
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Feb 28, 2024
Is LPG environmentally friendly?
Less than CNG, but cleaner than many fossil fuels.
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Feb 28, 2024
Is CNG environmentally friendly?
Yes, it has lower emissions compared to other fuels.
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Feb 28, 2024
Which is more energy-efficient, LPG or CNG?
LPG has a higher calorific value per unit.
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Feb 28, 2024
Which requires more complex storage, LPG or CNG?
CNG, due to its high-pressure requirements.
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Feb 28, 2024
What are the safety measures for LPG storage?
Adequate ventilation and leak detection systems.
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Feb 28, 2024
Can CNG be used in all types of vehicles?
No, only in vehicles specifically designed or retrofitted for CNG.
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Feb 28, 2024
Is LPG suitable for indoor use?
Yes, with proper safety precautions and ventilation.
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Feb 28, 2024
Can LPG leak be dangerous?
Yes, it's heavier than air and can cause hazards if not ventilated.
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Feb 28, 2024
Is CNG safe to use?
Yes, especially since it's lighter than air and disperses quickly.
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Feb 28, 2024
How does the cost of LPG compare to CNG?
This varies by region and market conditions.
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Feb 28, 2024
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About Author
Written by
Shumaila SaeedShumaila Saeed, an expert content creator with 6 years of experience, specializes in distilling complex topics into easily digestible comparisons, shining a light on the nuances that both inform and educate readers with clarity and accuracy.
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