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Natural Gas Processing / Treating
 



Liquids Recovery - LPG Recovery Unit

     
LPG Liquids Recovery Technology
  The patented AET Process LPG Recovery Unit technology utilizes non-cryogenic absorption to recover C2+ or C3+ natural gas liquids (LPGs) from natural gas streams.  The absorbed LPGs in the rich solvent from the bottom of the LPG absorber column are fractionated in the solvent regenerator column which separates LPGs overhead and lean solvent produced at the bottom.  After heat recuperation, the lean solvent is presaturated with absorber overhead gases.  The chilled solvent flows in the top of the absorber column.  The separated gas from the presaturator separator form the pipeline sales gas.

Depending upon the economics of ethane recovery, the operation of the AET LPG plant can be switched on-line from ethane plus recovery to propane plus recovery without affecting the propane recovery levels.  The AET LPG plant uses lighter lean oils.  For most applications there are no solvent make-up requirements.  AET Partners can assist in the design of retrofits for heavy lean oil facilities.

Liquids Recovery - NGL Recovery Unit

     
NGL Liquids Recovery Technology
  The patented AET Process NGL Recovery Unit technology utilizes non-cryogenic absorption to recover C2+ or C3+ natural gas liquids (NGLs) from natural gas streams.  The absorbed NGLs in the rich solvent from the bottom of the NGL absorber column are fractionated in the solvent regenerator column which separates NGLs overhead and lean solvent produced at the bottom.  After heat recuperation, the lean solvent is presaturated with absorber overhead gases.  The chilled solvent flows in the top of the absorber column.  The separated gas from the presaturator separator form the pipeline sales gas.

Depending upon the economics of ethane recovery, the operation of the AET NGL plant can be switched on-line from ethane plus recovery to propane plus recovery without affecting the propane recovery levels.  The AET NGL plant uses lighter lean oils.  For most applications there are no solvent make-up requirements.  AET Partners can assist in the design of retrofits for heavy lean oil facilities.

Liquids Recovery - Nitrogen Rejection Unit (NRU)

     
Nitrogen Rejection Unit (NRU)
  The AET nitrogen rejection technology utilizes non-cryogenic absorption to separate methane and heavier hydrocarbons from nitrogen containing natural gases.  If desired, propane plus NGL product can be produced.  The absorbed methane and heavier hydrocarbons are flashed off from the solvent by reducing the pressure of the absorbed bottoms stream in multiple steps to minimize gas compression.

The separated gases leave as the sales gas product. The liquid from the proven heatless flash regeneration step is returned to the top of the methane absorber as lean solvent. If helium is present, the overhead stream from the methane absorber is further processed in a membrane/PSA unit to produce Grade A helium and nitrogen product is available at high pressure. If desired, the AET Process NRU may be cost-effectively integrated with C3+ NGL and helium recovery. For most applications there are no solvent makeup requirements.



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