Natural Gas Plants Overview
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Questions and Answers

What is the predominant constituent of natural gas?

  • Butane
  • Methane (correct)
  • Ethane
  • Propane

What are some of the hydrocarbon constituents found in natural gas, in decreasing percentages?

  • Ethane, propane, butane, pentane
  • Ethane, propane, butane, hexane (correct)
  • Methane, ethane, butane, propane
  • Propane, butane, pentane, hexane

What contaminants can be found in the natural gas stream?

  • Methanol, nitrogen, water vapor
  • Carbon dioxide, hydrogen sulfide, helium (correct)
  • Water vapor, carbon monoxide, sulfur dioxide
  • Methanol, helium, nitrogen

Which of the following is NOT a main function of natural gas plants mentioned in the text?

<p>Extract and transport liquid natural gasoline (B)</p> Signup and view all the answers

Which facility function depends on the nature of the gas well and the composition of the gas?

<p>Re-pressurizing the gas (B)</p> Signup and view all the answers

What is another term used to refer to liquid natural gasoline found in natural gas streams?

<p>Condensate (A)</p> Signup and view all the answers

What is the Claus reaction for the production of elemental sulfur?

<p>2H2S + SO2 → 3S + 2H2O (A)</p> Signup and view all the answers

How is nitrogen typically removed from the gas stream in a natural gas processing plant?

<p>Cryogenic distillation (D)</p> Signup and view all the answers

What is the main purpose of the Claus process in natural gas processing?

<p>To recover elemental sulfur (A)</p> Signup and view all the answers

In the liquefaction stage of natural gas processing, what is the typical temperature range for sub-cooling?

<p>-100 to -125°C (D)</p> Signup and view all the answers

Which gas is most commonly used as a refrigerant in the pre-cooling stage of natural gas liquefaction?

<p>Propane (B)</p> Signup and view all the answers

What is the primary method for hydrocarbon recovery in modern natural gas processing plants?

<p>Cryogenic turboexpander followed by a fractionating process (D)</p> Signup and view all the answers

What is the primary purpose of the absorption process in natural gas processing?

<p>Absorption removes hydrogen sulfide and carbon dioxide (acid gases). (D)</p> Signup and view all the answers

What is the main purpose of acid gas removal in natural gas processing?

<p>To prevent corrosive damage to equipment and pipelines. (C)</p> Signup and view all the answers

What is the purpose of stabilization in the natural gas processing sequence?

<p>To flash off gases from the liquid hydrocarbons at low pressure. (D)</p> Signup and view all the answers

What is the primary method used for cryogenic removal of high concentrations of CO2 in natural gas processing?

<p>Expansion turbine (C)</p> Signup and view all the answers

How is dehydration accomplished in the natural gas processing sequence?

<p>By absorbing water through contact with a glycol mixture (D)</p> Signup and view all the answers

Which stage involves sending hydrogen sulfide removed from natural gas to the sulfur plant for sulfur recovery?

<p>Absorption (A)</p> Signup and view all the answers

In which stage does cooling of the inlet gas occur in a typical compression process?

<p>Inlet Compression (D)</p> Signup and view all the answers

What is one of the purposes of recompression in natural gas processing?

<p>To increase pressure for sales or fuel gas use. (B)</p> Signup and view all the answers

What is a common method used in acid gas removal processes in natural gas processing?

<p>Fractionators (B)</p> Signup and view all the answers

Which type of compressor is typically used for reservoir pressure maintenance gas injection in natural gas processing?

<p>Reciprocating compressors (C)</p> Signup and view all the answers

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