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LNG – Liquefied Natural Gas – is natural gas (methane) cryogenically liquefied. 

LPG – Liquefied Petroleum Gas – is mainly propane and butane alone or in mixtures liquified under pressure. LPG is produced from crude oil refining and natural gas processing.

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LNG

 

LNG – Liquefied Natural Gas – is natural gas (methane) cryogenically liquefied.

 LPG

 

LPG – Liquefied Petroleum Gas – is mainly propane and butane alone or in mixtures liquified under pressure. LPG is produced from crude oil refining and natural gas processing.


LNG,in general terms, is considered safer than LPG.LNG is lighter than air while LPG is heavier..iquefied natural gas (LNG) is natural gas that has been cooled to a liquid state, at about -260° Fahrenheit, for shipping and storage. The volume of natural gas in its liquid state is about 600 times smaller than its volume in its gaseous state.LNG is a valuable power source that can power the transition to renewable energy. Due to its versatility, it has many uses - transportation, heating, and electricity generation. We expect to see a significant increase in LNG access, consumption, and production in the coming decades.
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Which is better LPG or LNG?
LPG is derived from natural gas processing. LPG is better than Natural gas because it has a higher energy content, it is portable and available everywhere, and in many cases, it is now less expensive. Here's an interesting read regarding the properties, uses, disadvantages and comparison of LPG & LNG.
Can LNG be converted to LPG?

The cost to convert from LNG to LPG is minimal as well. With long term supply deals we can offset most infrastructure costs. To burn LNG at a site a cryogenic tank needs to be installed with a vaporizer. A common question is can I use the existing propane tank on site and the answer is no, it must be a cryogenic tank.

The gas extracted from underground hydrocarbon deposits contains a varying mix of hydrocarbon components, which usually includes mostly methane (CH4), along with ethane (C2H6), propane (C3H8) and butane (C4H10). Other gases also occur in natural gas, notably CO2. These gases have wide-ranging boiling points and also different heating values, allowing different routes to commercialization and also different uses. The "acidic" elements such as hydrogen sulphide (H2S) and carbon dioxide (CO2), together with oil, mud, water, and mercury, are removed from the gas to deliver a clean sweetened stream of gas. Failure to remove much or all of such acidic molecules, mercury, and other impurities could result in damage to the equipment. Corrosion of steel pipes and amalgamization of mercury to aluminum within cryogenic heat exchangers could cause expensive damage. The gas stream is typically separated into the liquefied petroleum fractions (butane and propane), which can be stored in liquid form at relatively low pressure, and the lighter ethane and methane fractions. These lighter fractions of methane and ethane are then liquefied to make up the bulk of LNG that is shipped. Natural gas was considered during the 20th century to be economically unimportant wherever gas-producing oil or gas fields were distant from gas pipelines or located in offshore locations where pipelines were not viable. In the past this usually meant that natural gas produced was typically flared, especially since unlike oil, no viable method for natural gas storage or transport existed other than compressed gas pipelines to end users of the same gas. This meant that natural gas markets were historically entirely local, and any production had to be consumed within the local or regional network. Developments of production processes, cryogenic storage, and transportation effectively created the tools required to commercialize natural gas into a global market which now competes with other fuels. Furthermore, the development of LNG storage also introduced a reliability in networks which was previously thought impossible. Given that storage of other fuels is relatively easily secured using simple tanks, a supply for several months could be kept in storage. With the advent of large-scale cryogenic storage, it became possible to create long term gas storage reserves. These reserves of liquefied gas could be deployed at a moment's notice through regasification processes, and today are the main means for networks to handle local peak shaving requirements.

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