novel method gas separation(ingles)gym
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Overview
Current process
New process
Economic comparison
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Natural Gas Processing Everything Together
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Water removalRemoves &ree li'uid
water andcondensate gas
ends the gas to a
re(nery
The water goes towaste
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Natural Gas Processing Everything Together
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Natural Gas Processing
)cid Gas Removal*ydrogen sul(de
+ercaptans
Car$on dioxide
)cid gas removal processes)mine treating
,en(eld processul(nol process
others
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Natural Gas Processing
)mine Treatment+ost common used
amines
+onoethanolamineDiethanolamine
Diisopropylyamine
+ethylethanolamine
*ydrogen sul(de goesthrough a Claus process
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Natural Gas Processing)mine Treating
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Natural Gas Processing
ul(nol Process-sed to reduce *.#
CO.# and mercaptans&rom gases
Great &or treating large'uantities o& gas
olvent a$sor$s thesour gas
ul&olane is used
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Natural Gas Processing
ul(nol Process
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Natural Gas Processing Everything Together
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Natural Gas Processing
Glycol Dehydration+ethod &or removing the water vapor &rom the
gas
-sa$le glycols Triethylene glycol /
most commonly used
Diethylene glycol
Ethylene glycol Tetraethylene glycol
Wor0s $y having the glycol adsor$ the water
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Natural Gas ProcessingGlycol Dehydration
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Pressure wing )dsorption)dsor$ent material is
used
Gas and material go
under high pressure+aterial adsor$s the
gas " *.# mercaptans#CO.%
DisadvantagesRe'uires high pressures
low cycle times
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Natural Gas Processing
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+ercury removalCurrent Processes)ctivated car$on / through chemisorption1
)ctivated has extremely high sur&ace area
+ercury can damages aluminum heat
exchangers Those used in cryogenic processing plants
Those use in li'ue&action plants
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Natural Gas Processing
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Nitrogen Re2ectionProcesses that can
re2ect nitrogenCryogenic process
)$sorption process"using lean oil orsolvent%
+em$rane separation
)dsorption process"activated car$on%
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Natural Gas Processing
Cryogenic ProcessCommon re&rigerants used
+ost common method &or removal o&impurities such as nitrogen
Disadvantages+ust reach extremely low temperatures
Only use&ul &or large scale production
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Natural Gas Processing
!ean Oil Removal
!ean oil is &ed countercurrent with the wet gas
Temperature and pressure are set to allow &orthe greatest a$sorption o& unwanted gases
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Natural Gas Processing
+em$ranesDriving &orcePartial pressure
Type o& materialdetermine permea$ility
k D P ×=
D = diffusion coefficient (cm2/s)
k = Henry’s law sorption
coefficient (cm3/cm3cmHg)
2
1
P
P =α
P1 = Permeaility of component 1
P2 = Permeaility of component 2
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Natural Gas ProcessingEconomics
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Demethani3er
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Demethani3er The next step is to
recover the NG!4s
ProcessCryogenics using a
tur$o5expander can $eused This is the most
common
!ean oil adsorptioncan $e used here
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Natural Gas ProcessingCryogenic Process
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NG! recovery
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NG! recovery
Now the rest o&the li'uid is &ed tothree unitsDeethani3er
De$utani3er
Depropani3er
ProcessEach sent to a
distillation column
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weetening NG!4s
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+erox Processes+ercaptan oxidation
Removes mercaptans &romPropane
,utane
!arger hydrocar$ons
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Natural Gas Processing )nother Process
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Novel +ethod
Technical in&ormationmomentarily not availa$ledue to 6P issues
*owever economics will $ecompared
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Novel +ethod)dvantage+ore cost e7ective than any previous methods
!ess environmental impacts than previousmethods
eparates all contaminants
eparates each component
Everything is done using one process
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Novel +ethod
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