Natural Gas Purification Process
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Questions and Answers

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

  • To dehydrate the natural gas
  • To remove nitrogen from the gas stream
  • To separate helium from nitrogen
  • To recover sulfur from H2S (correct)

    • Which gas is typically removed by cryogenic distillation in a manner similar to hydrocarbons in natural gas processing?

  • Hydrogen
  • Helium
  • Methane
  • Nitrogen (correct)

    • In natural gas liquefaction, what is the purpose of the sub-cooling stage in the cryogenic process?

  • To extract propane and ethane
  • To cool the gas to about -162°C (correct)
  • To maximize the efficiency of the cooling process
  • To remove impurities from the natural gas

    • What is the typical composition of liquefied natural gas (LNG) produced in natural gas processing?

    <p>&gt;90% methane (D)</p> Signup and view all the answers

    Which process is undertaken most often for hydrocarbon recovery in modern natural gas plants?

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

    What is the main function of natural gas plants mentioned in the text?

    <p>Purify natural gas and remove contaminants (A)</p> Signup and view all the answers

    Which hydrocarbon is mentioned as the predominant constituent in natural gas?

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

    What is a common contaminant found in the natural gas stream mentioned in the text?

    <p>Water vapor (C)</p> Signup and view all the answers

    What is the purpose of re-pressurizing the gas in natural gas plants?

    <p>For transmission purposes (A)</p> Signup and view all the answers

    What type of hydrocarbons are removed as saleable by-products in natural gas plants?

    <p>Ethane, propane, butane, condensate, and sulfur (C)</p> Signup and view all the answers

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

    <p>To increase the pressure of the gases (A)</p> Signup and view all the answers

    Which type of compressors are typically used for natural gas gathering systems and liquefied natural gas (LNG) applications?

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

    What is the main reason for using cryogenic removal in the gas processing plant?

    <p>To remove CO2 and H2S when concentrations are high (A)</p> Signup and view all the answers

    What role does acid gas removal play in the natural gas processing facility?

    <p>Absorbing hydrogen sulfide and carbon dioxide (D)</p> Signup and view all the answers

    How is steam turbine power generation utilized in the natural gas processing facility?

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

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