MEADEAMDEA

COH2S

CO2

MEADEAMDEA

Scrubber Solution

Surge Drum

Surge Drum

Rich Amine

Flash Drum

Lean Amine Surge Drum

Foaming

MonoDiTri

O-H

SNHRSHNHR )(2)(2 2222

)(2)(2 22222 HSNHRSHSNHR

322222 )(22 CONHRCOOHNHR

)(2)(2 32222322 HCONHRCOOHCONHR

22222 )(2 RNHCOONRCONHR

MEA : HO-C2H4-NH2

DEA : ( HO-C2H4 )2=NH

( TEA : ( HO-C2H4 )3=N

( DGA : HO-C2H4-O-C2H4-NH2 )

DIPA : ( HO-C3H6)2=NH)

MDEA : ( HO-C2H4)2=N-CH3 )

680 F

( Alkanolamin Corrosion)

corrosion contributing factor

preventive measures

CO2 or H2S

(MEA)

CO2 or H2SMEA

DEA

DEAMEA

CO2H2S

MDEA

MEA DEA

MEA

DEAMDEA

Rich amin Cross exchanger

Reboiler

Mechanical design consideration

Carbon steel

Stainless steel

Carbon steel1 mils / year100

mils / yearStainless steel316L

Monel

Degradation

Flow in piping and vessels

Carbon steel3 ft / secStainless

steel5

8 ft / sec

Long Radius Elbow

Eliminate flow restriction

NPSHA

Cavitations

Control Valves

Flashing

Level

Level

Filtration

5 micron3 micron

Spare

Sock-type

bag or

(Guard filter

ReachH2S

ReachCO2Slip stream

filterLean

Reach

stress relieving

NACE / API

MEA

Surge drum

DEA

DEA

225 F (107C)300F

(149C)

XorVsquare

CO2

1HHCOeCOH 332

CO2

2OHCOCOH 2232

H2S

3)(22 HFeSSHFe

MEADEAMDEA

MEA

MEADEACO2

DegradationMDEA

CO2

H2S

MEADEAMDEA

MEADEAMDEA

DEAMDEAMEA

MEACO2

DEACO2MEADEAMDEA

CO2

CO2MEA

DEA DEA MDEA

MEADEAMDEAActivate

CO2

DegradationMEA

DEAMDEA

MEADEAMDEA

MEA DEAMDEAMDEA

(1)

342422242 )()(2 NHHCOHCarbamatONHCOHCOHCOMEANHHCOH

(2)32,

2422

3

NHCOHCHHONHHHOC OHFe

IR10

NGL 1200

MEA

DEA

MEA

H2S

0.657ppm

8ppm

MEA

MEA H2S

4ppm

MEA

H2S CO2

DEA

.

MEA 30

DEA

MEA

DEA

DEA

Rich

lean

MEA

Formate OxalateThiosulfate Thiocynate

Heat stable salts ( HSS )

HSS

HSS

HSS500ppm

HSS Heat Stable Salts

Corrosion Inhibitors

Splash

Make up water

make up

(Foaming

filteration

MEACO

10CO2COMEA

Reformer-1001

CO, CO2

MEA

CO2

COCarbon Steel

Cast Iron

P

1001AShut down

MEADischargeP-1001

Rich MEA

SS304

BallSS

P-1001Reducer1 ½

3

Casing Cover P-1001

MEA15%

Reformer

MEA O2=0.66% , H2O=6.14%CO,CO2,N2

MEA

HSS

HSS=8.8% Fe=130 ppm Cl=75 ppm

MEA

Fe+3

HSS

MEA

ErosionPassive

CO2MEA0.4 mol co2/mol mea

MEA

HSSMEAReclaim Make up

0.5%MEA2ml

0.150 mlMEA

0.8%

HSS Reboiler150 c

MEASS 316L

MEA

(NaO3V)0.05%

3micron

MEA

binderMEA

MEA

norit type Ro 0.8 , carbo tech type DG1/3

CO2MEA0.4mol co2 / mol mea

Rich meaSS316

PIPINGFitting Rich MEA

P 1001A/R

1. Understanding corrosion in alkanolamine gas treating plants written by M.S.Dupart , T.R.Bacon and D.J.Edwards GAS/SPEC Technology Group of the DOW chemical USA 1993

2. Texas gas plant faces ongoing battle with oxygen contamination . Andy sergeant GAS/SPEC Technology Group And Mike Howard Duke Energy Field Services

3. Metals Handbook Ninth Edition Volume 13 Corrosion 1990 4. Oxidative Degradation of Monoethanolamine by Susan chi and

Gray T.Rochelle University of Texas 2001

Fig 9

Corroded flange by Rich MEA

Fig 10

Corroded Casing Cover P - 1001 by Rich MEA

Fig 11

Corroded Elbow by Rich MEA

Fig 12

Corroded flange by Rich MEA

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