//Oil and Gas Hydrotreating Process

Oil and Gas Hydrotreating Process

Hydrotreating is a process widely used in the petroleum industry for producing high quality fuels and the most common processes from removing sulfur and nitrogen impurities. Today on #PetroKNOWLEDGE we’ll learn oil and gas hydrotreating process

Here’s how the flow of the oil and gas hydrotreating process works.
Oil and Gas Hydrotreating Process:

  • Feed is mixed with recycle hydrogen stream and sent to heat exchange in a furnace for heating
  • the heated feed mixture is sent to the hydrotreating packed bed reactor. The reactor outlet is cooled and mixed with water.
  • the water mixed reactor stream is sent to a phase separator. The phase separator splits the feed stream to three separate streams namely a gas phase stream, an organic stream and an aqueous stream.
  • The aqueous stream is rich of H2S and NH3 and will be sent out to a sour water processing unit to recover H2S and NH3.  The sour water processing unit uses amine based absorption technology to recover H2S.
  • The hydrotreated product is the organic stream enters a fractionator to stabilize the hydrotreated products

Here are some facts about Oil and Gas Hydrotreating Process :

  • Higher pressure and temperature are used when heavier feed stocks are used.
  • The hydrotreating reactions are exothermic and therefore, the reactor product needs to be cooled.


Gary J.H., Handwerk G.E., Petroleum Refining: Technology and Economics, Taylor & Francis, 2005.

Jones D.S.J., Elements of Petroleum Processing, John Wiley & Sons, 1995.

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