Natural-gas liquids: Gasoline condensed from natural gas by compression and cooling is known as which type of gasoline?

Difficulty: Easy

Correct Answer: Casing-head gasoline

Explanation:


Introduction:
Gas production streams can contain heavier hydrocarbons that condense as liquids under compression and cooling. The condensed gasoline-range material has a specific name in refining terminology.


Given Data / Assumptions:

  • Source: Natural gas streams.
  • Process: Compression and cooling.
  • Product: Gasoline-range liquid hydrocarbon mix.


Concept / Approach:
When separated from natural gas at the wellhead or gathering systems by pressure and temperature reduction, the gasoline-range liquid is called casing-head gasoline (a natural gasoline or condensate fraction).


Step-by-Step Solution:

Step 1: Identify the product obtained by condensing heavier hydrocarbons from gas.Step 2: Recall standard term: casing-head gasoline.Step 3: Match to options.


Verification / Alternative check:
Terminology in upstream/midstream operations distinguishes straight-run (from crude distillation), polymer gasoline (polymerization), and reformate (catalytic reforming) from this natural-gas-derived fraction.


Why Other Options Are Wrong:

  • Polymer gasoline: Produced via polymerization of olefins, not gas condensation.
  • Unleaded gasoline: Refers to additive policy, not origin.
  • Straight-run gasoline: From crude distillation, not gas plants.
  • Reformate gasoline: From catalytic reforming of naphtha.


Common Pitfalls:
Confusing “condensate/natural gasoline” with straight-run or reformate due to overlapping boiling ranges.


Final Answer:
Casing-head gasoline

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