What Is LNG? Advantages, Process, and Differences from LPG

Natural gas is a crucial energy source worldwide because it meets various energy needs. This gas is processed to be distributed as usable fuels, such as LPG and LNG.

LNG is an energy source widely used in power plants and industries, while LPG is commonly utilized in households. Let’s learn the role of LNG in energy security and what makes it different from LPG in this article.

What Is LNG?

Liquefied Natural Gas (LNG) is a gas transformed into a liquid, allowing it to be distributed safely. It is chilled to -162°C, decreasing the volume to 600 times its initial volume.

LNG has a lower density than water. It is odorless, colorless, and non-toxic. Despite being odorless, regasified natural gas is commonly added with odorants, such as ethyl mercaptan and tetrahydrothiophene (THT), to detect leaks. If the gas is not being odorized, the leak potential is monitored using gas sensors.

How Is LNG Made?

How Is LNG Made In general, LNG production undergoes three steps:

Gas extraction: Natural gas is extracted from underground or offshore platforms.
Liquefaction: Natural gas is purified to remove unwanted components, such as water and carbon dioxide. Then, the gas is transported to the liquefaction plant to be liquefied.
Transportation: LNG is distributed using compressed containers. Arriving at the destination, LNG will be regasified into its gas form, allowing distribution through pipelines and used by businesses or households.

Natural gas can be liquefied through various cryogenic processes, including the cascade process and the Linde method. In the cascade process, natural gas is gradually cooled using several types of refrigerants with different boiling points until it reaches its liquefaction temperature.

Meanwhile, the Linde method utilizes a repetitive (regenerative) process of gas compression, cooling, and expansion, causing the gas temperature to continuously decrease until it eventually turns into a liquid.

LNG must be stored under special conditions because it has a very low boiling point of −162°C compared to conditions at the Earth’s surface. Therefore, LNG is stored in specially insulated steel tanks capable of maintaining such low temperatures without requiring an additional cooling system.

Advantages and Disadvantages of LNG

Before using LNG, you must consider the advantages and disadvantages of this natural gas. Below is the information:

Advantages of LNG:

Potential alternative energy source.
Lower emissions than other fossil fuels. LNG reduces carbon dioxide levels and almost removes sulfur dioxide, nitrogen oxides, and particulates.
Potential energy diversification and reducing complete dependence on fossil fuels.
Potential energy transition strategy.

Disadvantages of LNG:

Quick price fluctuations.
Emits methane emissions from transportation or leaks.
The infrastructure infestation is quite high.

LNG Uses

Despite being widely used in the manufacturing sector, the use of LNG is more varied. Here are some of them:

Industry: LNG is broadly used as a fuel in the petrochemical, manufacturing, and steel industries because it produces lower emissions compared to coal and petroleum.
Power generation: Recently, LNG has been extensively used as a fuel for power plants, particularly natural gas-fired power plants. LNG offers more efficient and flexible performance compared to coal.
Transportation: LNG can be used as fuel for heavy-duty vehicles, such as buses and trucks, because it produces lower emissions and has a lower density than diesel. In addition, LNG is also used as fuel for ships.
Households: LNG can also be used as an energy source for household activities, such as cooking and heating.

LPG vs. LNG: What’s the Difference?

LPG and LNG are both alternative energy sources, but they have distinct origins, compositions, use, and production processes. Here are the differences:

	LPG	LNG
Production and composition	It mostly contains propane and butane. LPG comes from crude oil refining and natural gas extraction.	It is cooled to -162°C to be liquefied.
Uses	LPG is broadly used in households as a fuel because it is accessible and cost-effective.	LNG is mostly used in the industry and power plant sectors.
Storage	LPG can be stored in a pressurized tank at room temperature.	LNG needs an insulated cryogenic tank to maintain its low temperature.

Beyond LNG development, LPG continues to play a vital role in the national energy supply. Optimizing its use depends not only on availability but also on an integrated logistics system that ensures safe distribution.

Chandra Asri Group is a company engaged in chemical, energy, and infrastructure solutions and provides land and sea logistics services for the distribution of LPG and chemicals. Through PT Chandra Shipping International (CSI), the company operates more than 10 LPG and chemical carriers with capacities ranging from 4,200 to 9,600 DWT.

Furthermore, Chandra Asri Group’s integrated logistics services are further supported by land transportation, chemical storage tanks, and warehouses. The logistics services provided include inter-island transportation, export and import facilities, maritime transport, and customs services.

So, do not hesitate to rely on Chandra Asri Group as #YourGrowthPartner!