LNG more compressible than CNG; can be used as vehicle fuel

Q.  Which of the following is/are true?

1) CNG achieves a higher reduction in volume than LNG.
2) LNG cannot be used to fuel the road transport sector.
- Published on 16 Sep 16

a. Only 1
b. Only 2
c. Both 1 and 2
d. Neither 1 nor 2

ANSWER: Neither 1 nor 2
 
  • LNG achieves a higher reduction in volume than compressed natural gas (CNG) so that the (volumetric) energy density of LNG is 2.4 times greater than that of CNG or 60 percent that of diesel fuel.
  • This makes LNG cost efficient to transport over long distances where pipelines do not exist. Specially designed cryogenic sea vessels (LNG carriers) or cryogenic road tankers are used for its transport. LNG is principally used for transporting natural gas to markets, where it is regasified and distributed as pipeline natural gas.
  • It can be used in natural gas vehicles, although it is more common to design vehicles to use compressed natural gas.
  • LNG has the potential to replace LPG, Naphtha, and HFO fuel. It would serve a variety of industries such as metal, ceramic and glass, food processing, refractory’s etc. as well as heavy mining machineries. LNG could even fuel the road transport sector.

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