You are shopping for natural gas and have found the following two possibilities.

Question

You are shopping for natural gas and have found the following two possibilities. The

percent of gases and liquid in each stream are as follows. You want the LNG with the

higher energy content. Which one would you chose?

LNG 1            LNG 2

Methane (C1)                         97%                 80%

Ethane (C2)                             0.5%                15%

Propane C3                             <0.1%              4%

Butane (C4)                            0.5%                1%

Pentane and heavier (C5+)     0.0%                < 1%

Nitrogen (N2)                         1%                   0%

LNG1

LNG2

LNG1 and LNG2 because they have the same energy content

Neither b/c their energy content is negative

All of the above

LNG1

LNG2

LNG1 and LNG2 because they have the same energy content

Neither b/c their energy content is negative

All of the above

Explanation / Answer

Shopping for liquified natural gas (LNG) would be the one which has higher percentage of lower alkanes and lower content of higher alkanes

Thus,

among the two LNG's the best choice here would be,

LNG1

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