Natural Gas Plants
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Questions and Answers

What is the predominant constituent of natural gas?

  • Methane (correct)
  • Butane
  • Ethane
  • Propane

    • Why is it necessary to purify natural gas before use?

  • To add contaminants for safety reasons
  • To increase its condensation rate
  • To remove impurities that are objectionable to pipeline transmission companies (correct)
  • To make it more flammable

    • What are some hydrocarbon constituents found in natural gas besides methane?

  • Ethane, propane, and butane (correct)
  • Pentane and hexane
  • Carbon dioxide, water vapor, and liquid natural gasoline
  • Helium, nitrogen, and hydrogen sulfide

    • What is the function of separating and removing entrained liquid hydrocarbons in natural gas plants?

    <p>To prevent corrosion in the pipelines</p> Signup and view all the answers

    Why does natural gas need to be re-pressurized for transmission purposes?

    <p>To maintain the pressure needed for long-distance transportation</p> Signup and view all the answers

    What are some common contaminants found in natural gas streams?

    <p>Carbon dioxide and water vapor</p> Signup and view all the answers

    What is the main purpose of the Claus process described in the text?

    <p>Producing elemental sulfur</p> Signup and view all the answers

    How is nitrogen typically removed from natural gas in modern plants?

    <p>By cryogenic distillation</p> Signup and view all the answers

    Which of the following is NOT extracted in the hydrocarbon recovery process described?

    <p>Pentane</p> Signup and view all the answers

    In what temperature range is the pre-cooling stage of liquefaction typically carried out?

    <p>-30 to -50°C</p> Signup and view all the answers

    Which refrigerant is typically used during the liquefaction stage of natural gas processing?

    <p>Methane</p> Signup and view all the answers

    What is the primary method used for helium removal/production from helium-bearing natural gas?

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

    What is the purpose of absorption in the natural gas production process?

    <p>To absorb hydrogen sulfide and carbon dioxide using an amine solution</p> Signup and view all the answers

    What is the primary reason for dehydration in the natural gas production process?

    <p>To remove water through contact with a glycol mixture</p> Signup and view all the answers

    In natural gas production, what is the purpose of stabilization?

    <p>To remove gases at low pressure from liquid hydrocarbons</p> Signup and view all the answers

    What is the primary function of recompression in the natural gas production process?

    <p>To increase the pressure of gases for sales or fuel gas use</p> Signup and view all the answers

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

    <p>To prevent corrosive damage and meet regulatory requirements</p> Signup and view all the answers

    Why is sulfur recovery using the Claus process necessary in natural gas processing?

    <p>To meet regulatory requirements and avoid harm to the environment</p> Signup and view all the answers

    What happens during cryogenic removal in the natural gas processing?

    <p>The gas stream flows through an expansion valve to lower pressure and temperature</p> Signup and view all the answers

    What is typically used for low-pressure compression in natural gas production?

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

    What is used in acid gas removal to absorb H2S and CO2?

    <p>Amine solutions like monoethanolamine (MEA)</p> Signup and view all the answers

    What kind of gases are treated by absorption in natural gas production?

    <p>Hydrogen sulfide and carbon dioxide (acid gases)</p> Signup and view all the answers

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