FLEXSORB Technology and FLEXSORB SE Hybrid

FLEXSORB™ Technology and
FLEXSORB SE Hybrid Technology Suite
Selective Gas Treating to Enhance
Upstream and Refining Projects
Worley Parsons Workshop
SOGAT Conference
Abu Dhabi, March 24, 2014
Mr. Luke Kariparampil
Dr. Girish Chitnis
Mr. Steve Crookes
Mr. Tye Aikins
Mr. David Motes
First, a Brief History of Hindered Amines
►In
1983, the FLEXSORB SE process was first commercialized in
refinery sulfur plant Tail Gas Clean Up (TGCU) application
►FLEXSORB SE / SE PLUS
processes have been extended to include
applications in Acid Gas Enrichment (AGE), onshore and offshore
natural gas treating and FLEXICOKING™ Technology flexigas treating
►To
date, a total of ~ 6 BCFD of gas is being treated by FLEXSORB SE /
SE PLUS process, with another 4 BCFD in the engineering evaluation
and design phase
►FLEXSORB SE Hybrid technology has an
for removal of COS and mercaptans
◄2►
additional Physical Solvent
The Structure of Amines
Primary Amine
Secondary Amine
Tertiary Amine
..
N
..
N
..
N
R
H
H
R1
H
R1
R2
Secondary
SecondaryAmine
Amine
R3
Tertiary Amine
N
Bulky R H
R2
N
H 2C
R
Severely Hindered
Amine FLEXSORB SE
H 2C
CH2
CH3
CH2
MDEA
HO
OH
What is Steric Hindrance?
►Sterically hindered
amines improve gas treating performance by
modifying the reactions with CO2
► Reaction rate
with CO2 is slowed because larger CO2 molecule is blocked from
reaching active nitrogen site while smaller H2S molecule is not adversely
impacted
Secondary Amine
Hindered Amine
..
N
N
R1
H
Bulky R H
R2
◄4►
R2
FLEXSORB SE Solvents for Selective H2S Removal
►All
FLEXSORB SE solvents use the same hindered amine
►FLEXSORB SE solvent formulations are optimized for
specific applications.
►FLEXSORB SE solvents
for selective H2S removal
►FLEXSORB SE PLUS
solvent for selective H2S removal where
high clean up is required to achieve treated gas specification of
< 10 vppm H2S
►FLEXSORB SE Hybrid technology
where both mercaptan and
COS removal are required with selective removal
◄5►
Applications of FLEXSORB SE Technology
CLAUS PLANT TGCU
ACID
GAS
CLAUS
PLANT
TG
SO2
TG
HYDROG.
TG
H2S
SULFUR
NATURAL GAS TREATING
50%
H2S
SELECTIVE
H2S
REMOVAL
NATURAL
GAS
SELECTIVE
H2S
REMOVAL
ACID GAS TO SULFUR RECOVERY
Tail Gas to Disposal
ACID GAS ENRICHMENT AND TAIL GAS TREATING
SEMI-RICH SOLVENT
LEAN SOLVENT
RAW
ACID GAS
AGE
SELECTIVE
H2S
REMOVAL
CO2
H2S
CLAUS
PLANT
SULFUR
SWEET
NATURAL GAS
TGCU
TG TO
DISPOSAL
FLEXSORB Technology Advantages and Fit Over MDEA
Unique high pressure applications
– Natural gas treating with low acid
gas partial pressure
Flexigas
Cleanup in
FLEXICOKING
Technology
FLEXSORB technology
uses conventional equipment
–
–
–
–
Smaller Footprint – Capex Savings
Lower Circulation – Opex Savings
Drop-in debottlenecks
high H2S Cleanup (<10 ppm)
Low pressure, selective H2S removal
– Tail gas clean-up – downstream refining
and upstream gas plants
– Acid gas enrichment – Low H2S in acid gas
Over
112 Units in
Operation
In most cases FLEXSORB
technology selection Over MDEA
is justified by life cycle cost
analysis
Stripping Gas Treatment Plant
(SGTP), Santa Ynez Unit,
Goleta, California
Incinerator SO2 Emissions - Switch
from FLEXSORB SE to FLEXSORB SE
Hybrid
Technology
ExxonMobil Santa Ynez Unit
February 23, 2012
Facility Overview
◄ 10 ►
Santa Ynez Unit, CA History
• Operating since the early 1980s
• 3 offshore platforms (Hondo,
Heritage and Harmony) and an
onshore oil and gas processing
facility in Las Flores Canyon
• Produced over 565 MBOE
between 1981 and 2009;
produced an average of 42 MCFD
of natural gas and 34 kbd of oil in
2011
• Las Flores Canyon cogeneration
plant generates average of 50 MW
of electricity to power onshore
and offshore facilities
• ~230 employees
◄ 11 ►
SYU LFC-SGTP Block Flow Diagram
◄ 12 ►
Opportunity to Lower SO2 Emissions
► Waste
Gas Incinerator SO2 emissions are proportional to Vac Flash to
Tail Gas unit - Mscf/d, follows SO2 ppm.
► Only 1% - 20% of SO2 emissions are from H2S ppm in Tail Gas unit
Overhead (10ppm H2S = 3.5 ppm SO2). Most SO2 is created by
>40ppm COS and mercaptans in Vacuum Flash, not recovered by the
Tail Gas unit.
◄ 13 ►
Model Check
Two Cases- FLEXSORB SE Technology - matched existing
operation as close as possible 2. Step change with Switch to
FLEXSORB SE Hybrid Technology .
Results
1.
Organic sulfur recovery increased from 2% to 70%, reducing SO2
emissions. Required full switch to FLEXSORB SE Hybrid technology to
obtain the 70% recovery.
2.
CO2 slip increased from current 84% to 88%, more H2S selective side
benefit. Explanation- FLEXSORB SE Hybrid technology has less CO2 solubility
than water.
3.
No negative impacts to Existing system, did not notice either change- 1. Increase
reboiler temp from 249F to 272F, original design = 277F, vs. 311F of 65# steam, no
problem, did not notice. Explanation- Physical Solvent in FLEXSORB SE Hybrid
technology has higher boiler point than water, higher reboiler temp needed for
same reflux. 2. Water make-up increases from 0.10 to 0.70gpm. ExplanationHigher water loss due to higher Reboiler temps, did not notice.
◄ 14 ►
FLEXSORB SE Hybrid Technology Recommendation
►
Switch from FLEXSORB SE system to FLEXSORB SE Hybrid
Technology to recover the organic sulfur.
► Switch made
by Adding Physical Solvent which is a Component of
FLEXSORB SE Hybrid Technology to the Existing FLEXSORB SE Technology
Circulating Inventory
►FLEXSORB SE Hybrid Technology
Relevant Fact - FLEXSORB PS
Technology sweetens upstream sour gas. PS also contains a
Physical Solvent.
◄ 15 ►
SO2 Emissions Decreased After FLEXSORB Hybrid Solvent
Addition
8% of Physical Solvent Added
Lower SO2 Emissions Led to reduction in
Purchased Fuel Gas.
◄ 16 ►
Proprietary
Impact of FLEXSORB SE Hybrid Technology
►Eliminated 41%
of 70% SO2 Emissions Attributable to Organic
Sulfur with Just 25% Physical Solvent Addition (Less than
Target).
David Motes 11-14-13.
◄ 17 ►
Proprietary
Summary
►
FLEXSORB SE Hybrid Technology is Ideal for Selective H2S Removal
Along with COS and Mercaptan Removal
►
Successfully Implemented FLEXSORB SE Hybrid Technology to lower SO2
Emissions at SYU Gas Treating Facilities in California
► Solution was Economical with 1.5 month payout.
►FLEXSORB Technology
is Suited
► To a
wide range of low pressure applications where H2S selectivity is required
► Applies well to unique high pressure applications
► CO2 slip and low H2S treat gas still achievable at elevated lean amine
temperatures
► Economic benefits accrue in terms of lower capex and opex and verified by
overall life cycle cost
► To over 100 commercial applications
◄ 18 ►

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