amine sweetening unit simplified design equations
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chemical reaction process
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Simplied Design Calculations for Natural Gas Amine Sw
Amine Circulation Rate
onoethanolamine !"A#
Diethanolamine !D"A# !conventional# !$%& mol acid gas pic'(up per mole
Diethanolamine !D"A# !high loading# !$%) mol acid gas pic'(up per mole
Activated ethyldiethanolamine !D"A# !assuming *+, ratio of D"A to
!$%& mol acid gas pic'(up per mole mi-ture assumed#
where:
y = Acid gas concentration in sour gas, mole%
x = Amine concentration in liquid solution, mass% (Refer Figu
Note
The amine circulation rate equations normally provide conservative (high) estima
circulation rate. They should not be used if the combined H2S plus CO2 concentra
is above mole!. They are also limited to a ma"imum amine concentration of ab
"stimated .eat "-change Re/uirements
ain Reference+ G0SA "ngineering Databoo'1 ,2th"dition1 S3 Units
Diglycolamine !DGA4# !$%2* mol acid gas pic'(up per mole DGA assume
$&'
= our 'as to "e rocessed, ))m*+day
x
yQQ SOGMEA = 327
x
yQQ SOGDEA = 361
x
yQQ SOGDEA = 256
x
yQQ SOGDGA = 448
x
yQQ SOGAcMDEA = 415
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"stimated 0ower Re/uirements
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Diameter of Amine Contactor
where:
contactor diameter, mm (round u to nearest 1- mm#
. = .ressure at to of contactor, /.a (a"s#
Diameter of Regenerator below feed point
where:
Regenerator "ottom diameter, mm
Diameter of Regenerator above feed point
where:
Regenerator diameter a"o0e feed oint, mm
c=
$&'
= our 'as to "e rocessed, ))m*+day
r=
$amine= Amine irculation Rate, m*
+h
ra=
P
QD SOGc = 10800
ear QD
min160=
rra DD = 67.0
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"-ample Calculation
3nputs
1
32 = -45 mole%
&2 = 246 mole%
Amine = 7A (con0#x = 2- mass%
. = 65- /.ag
5utputs
514!
Re"oiler 3 = 8-84! /9
Re"oiler A = 26!
*/9
262
Amine A37 3 = 116! /9
Amine A37 A = 28
Re;ux ondenser 3 = 2*5/9
Re;ux ondenser A = 1*1
)ain Amine .ums 111/9
Amine ciencies are low of the order of 12-%
*4 2- actual 0al0e trays are a standard design!4 A demister mist eliminator is ro0ided a"o0e the to tray to minimi?e amine lo
4 yical tray sacing is !8mm to 51-mm
54 acing "etween the to tray and the demister mist eliminator a"o0e the to t
84 .erformance monitoring of an amine contactor is normally done "y ro0iding a
the contactor gas inlet and the gas outlet
64 Aroximate ost data for amine contactor is ro0ided "elow:
Contactor Si6e
$&'
= ))m*+day
$amine
= m*+h
m2
Rich@ean Amine7xchanger 3 =
Rich@ean Amine7xchanger A =
m2
m2
m2
c=
r=
ra=
Cost71 ,$$$8
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1-2--
22*--
*8--
!6-5-
ost data is aroximate and deends on many factors such as selected materia
duties and taxes, fa"rication code followed, insection and testing costs, code sta
.reared "y: An/ur ri0asta0a
hemical 7ngineer
7mail:
-45m C .ac/ing
-4m C 2- rays
141m C 2- rays
14!m C 2- rays
an/urD2-51Ehotmail4com
mailto:ankur_2061@hotmail.commailto:ankur_2061@hotmail.com -
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etening Units
D"A assumed#
"A assumed#
D"A#
e 21! "elow#
es of required
tion in the feed gas
out #$! by mass.
#
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)7A
7A (con0#
7A (3@#
'AAc)7A
gineering Databoo'#
ses
ay is tyically --mm to 12--mm
. measurement "etween
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l and itBs cost, la"or cost,
ming requirements
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