UOP Selexol TM Technology for Acid Gas Removal UOP LLC. All rights reserved. UOP 5241F-01

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1 UOP Selexol TM Technology for Acid Gas Removal 2009 UOP LLC. All rights reserved. UOP 5241F-01

2 Main Points of Presentation Overview of the Selexol process Natural gas applications Syngas applications Selexol operation Coffeyville Resources UOP Experience and Technical Services Summary UOP 5241F-02

3 What is the Selexol Process? Absorption/regeneration process for selective removal of H 2 S, COS, RSH & CO 2 - Uses a physical solvent - Loading directly proportional to partial pressure - Uses a typical solvent-extraction flow-scheme Product Quality - Can be essentially sulfur free - Project specific CO 2 capture and quality - Project specific acid gas H 2 S concentration UOP 5241F-03

4 Solvent Loading Comparison Solvent Loading Chemical Physical High acid gas partial pressures in syngas are ideal for physical solvent application Partial Pressure UOP 5241F-07

5 Selexol Process Do s and Don ts Do s Selective H 2 S removal Total Sulfur removal (COS, CS 2, RSH) CO 2 removal / capture Natural Gas Applications Synthesis Gas Purification Acid gas removal with simultaneous dehydration Landfill gas treating Don'ts Rich HC Steams Low Acid Gas Partial Pressures UOP 4375A-26

6 Selexol Solvent Characteristics Relative Selectivity Methane - H 2 S ~ 135 ~ CH 3 SH ~ 340 ~ CO 2 ~ 9 ~45 - CO ~0.43 ~2.2 - COS ~35 ~175 Hydrogen High Selectivity of H 2 S over CO 2 allows: - Selective absorption of H 2 S in the Absorber - Enhanced recovery of CO 2 in flash drum - Minimizes CO 2 in acid gas - Lowers SRU costs - Higher power production Good Selectivity for CO 2 over H 2 - Supports separate CO 2 production - Minimizes downstream H 2 purification UOP 5241F-04

7 Selexol Solvent Characteristics High Selectivity of H 2 S over CO 2 allows: - Selective absorption of H 2 S in the Absorber - Enhanced recovery of CO 2 in flash drum - Minimizes CO 2 in acid gas, - Lowers SRU costs - Higher power production Good Selectivity for CO 2 over H 2 - Supports separate CO 2 production - Minimizes downstream H 2 purification UOP 5241F-05

8 Additional Selexol Process Benefits Low corrosion rates - No formation of heat-stable salts Minimal process effluents - Reclaiming and/or purging of solvent not required Protection of downstream equipment - Metal Carbonyls are captured by Selexol UOP 5241F-06

9 Main Points of Presentation Overview of the Selexol process Natural gas applications Syngas applications Selexol operation Coffeyville Resources UOP Experience and Technical Services Summary UOP 5241F-08

10 Natural Gas Feed Composition Natural Gas Methane Ethane Propane Butane Pentane C6 to C40+ Carbon dioxide Total Sulfur Water Mercury Composition Ranges (volume %) ~20 to 99 ~0 to 10 ~0 to 6 ~0 to 3 ~0 to 3 ~0 to 1 ppm to >80% ppm to >20% saturated ppb New gas discoveries typically contain more CO 2 & H 2 S than existing sources UOP 5241F-09

11 Selexol Process for Natural Gas Applications More effective at acid gas partial pressures above 50 psi in the feed Particularly effective at high acid gas partial pressure conditions and for bulk removal Selective removal of H 2 S if desired The heavy hydrocarbon(c 4+ ) concentration should be low, preferably limited to 1 vol%. UOP 5241F-10

12 Selexol Flowscheme Bulk Acid Gas Removal Treated Gas Lean Solution Filter Absorber Feed Gas CO 2 UOP 5241F-11

13 Selexol Advantages in NG Applications Little or no energy required for solvent regeneration Inert gas can be used for solvent stripping if required Selexol treating also aids in dew point reduction Can be used with or without refrigeration UOP 5241F-12

14 Main Points of Presentation Overview of the Selexol process Natural gas applications Syngas applications Selexol operation Coffeyville Resources UOP Experience and Technical Services Summary UOP 5241F-13

15 Gasification Project Objectives Past Present Future Power Hydrogen Other Products CO 2 Capture UOP 5241F-14

16 Syngas Applications Typical Flow-schemes Sulfur removal only Typically for power applications where sulfur removal to 10 to 20 ppmv One solvent absorber with solvent regeneration Sulfur removal with separate CO 2 removal and capture Used for hydrogen, chemical and coal to liquids applications Independent absorbers with common solvent regeneration UOP 5241F-15

17 Selexol Flowscheme for Sulfur Removal Treated Gas Lean Solution Filter H 2 S Stripper Acid Gas Reflux Accumulator H 2 S Absorber Feed Gas H 2 S Concentrator Reflux Pump Makeup Water Export Water Packinox Exchanger Stripper Reboiler UOP 5241F-16

18 Selexol Flowscheme for Sulfur Removal and CO 2 Capture Treated Gas CO 2 Absorber CO 2 Lean Solution Filter H 2 S Stripper Acid Gas Reflux Accumulator Feed Gas Sulfur Absorber H 2 S Concentrator Makeup Water Reflux Pump Export Water Packinox Exchanger Stripper Reboiler UOP 5241F-17

19 Requirements for Syngas Applications Processing Requirements: Efficient sulfur recovery Facilitate production of co-products High reliability CO 2 capture with H 2 to gas turbine Improved sulfur block economics Addressed by Selexol? High overall sulfur recovery (> 99.75%) Bulk CO 2 removal if necessary No Metal Carbonyls or Solvent Issues High CO 2 selectivity with H 2 in Syngas applications Reduces overall costs by >4% Selexol technology meets all requirements! UOP 5241F-18

20 Main Points of Presentation Overview of the Selexol process Natural gas applications Syngas applications Selexol operation Coffeyville Resources UOP Experience and Technical Services Summary UOP 5241F-19

21 Coffeyville Resources Coffeyville, Kansas, USA Gasification Ammonia Complex UOP 5241F-20

22 Coffeyville Resources Ammonia Fertilizer Complex Feedstock: 45 MT/H petroleum coke EPC Contractor: Black & Veatch Pritchard Commercial Operation: July 2000 Process Licensors Gasification: ChevronTexaco Gas Purification Block: - Acid Gas Removal: Selexol -H 2 Purification: Polybed PSA Sulfur: Black & Veatch Pritchard Air Separation: BOC Ammonia / UAN: Ammonia Casale / Weatherly UOP 5241F-21

23 Coffeyville Resources Ammonia Fertilizer Complex Complex converts petroleum coke to syngas for production of ammonia (21 T/H) and urea ammonium nitrate solution (62 T/H) with sulfur byproduct. Uses UOP Gas Purification Block - Removal of acid gases in a 2-stage Selexol unit with refrigerated solvent - H 2 S and CO 2 are captured separately with hydrogen product sent to the ammonia synthesis plant and CO 2 sent to the UAN plant - Final H 2 purification in Polybed PSA unit UOP 5241F-22

24 Coffeyville Block Flow Diagram Air NH 3 Product Air Separation Unit O 2 N 2 Ammonia Synthesis High Purity Hydrogen UAN Plant Purified CO 2 UAN Product Quench Gasification Petroleum Coke UOP Technologies Syngas Scrubbing Polybed PSA Tail Gas Raw H 2 CO Shift & Gas Cooling CO 2 Purification Raw CO 2 Selexol 2-Stage Unit Claus Plant CO 2 Vent Acid Gas UOP 5241F-23

25 Coffeyville Design Basis Feed Stream Specifications Feed Flowrate 169,000 Nm 3 /hr (151 MM SCFD) Pressure 36.9 bar-a (535 psia) Temperature 38 ºC (100 ºF) Component Mole % H 2 > 56 CO ~ 1.2 CO 2 ~ 41 H 2 S and COS ~ 0.6 CH 4, Ar, & N 2 ~ 1 H 2 O Saturated UOP 5241F-24

26 Coffeyville Design Basis Stream Specifications Product Raw H 2 Product Flowrate Product Purity 101,900 Nm 3 /hr (90 MM SCFD) 93 mole % H 2 (minimum) Raw CO 2 Product Flowrate Product Purity 11,900 Nm 3 /hr (10.6 MM SCFD) 95 mole % CO 2 (minimum) CO 2 Removed ~ 94 % Acid Gas Product Purity 44 mole % H 2 S (minimum) UOP 5241F-25

27 Coffeyville Actual Operations Operating Results Raw H 2 to PSA Design Actual DesignActual - H 2, % 93 > 93 - CO 2, % NA < 5 - H 2 S, ppm NA < 1 - COS, ppm NA < 1 Raw CO 2 to UAN - CO 2, % 95 > 95 - H 2 S, ppm NA < 1 - COS, ppm NA < 10 Units met all process requirements! UOP 5241F-26

28 Main Points of Presentation Overview of the Selexol process Natural gas applications Syngas applications Selexol operation Coffeyville Resources UOP Experience and Technical Services Summary UOP 5241F-27

29 Selexol Process Commercial Experience Over 60+ operating units - Both Natural Gas and Gasification applications 4 Recent Gasification Applications in Operation - Sarlux Italy IGCC Power plus H 2 - API Italy IGCC Power - Coffeyville Resources - USA -NH 3 /UAN - OptiCanada Oil Sands Canada H 2 plus fuel Multiple large units in engineering phase - Residue gasification for H 2 production, Oil Sands Canada - Other gasification projects 9 poly Generation projects) Power NH 3 Coal to liquids Methanol SNG UOP 5241F-28

30 Technical Service Guaranteed Performance Project Design Training & Start-up On-going Optimization & Innovation Before During After Training HAZOP Unit Checkout On-Site Training Test Run Continuing Services Data Link Access to Process Experts Remote Process Monitoring Analytical Support Symposia Process Training Turnaround Service Inspection UOP 5241F-29

31 Selexol Process-Summary The Selexol process is a proven licensed technology Selexol technology has unique capabilities for acid gas removal applications Relative selectivity allows for high quality project specific product streams Effective removal of all sulfur species Simultaneous dehydration of feed streams Can be an economically attractive option for Natural Gas applications UOP can assist you in optimizing and maximizing the value of your project UOP 5241F-30

32 Selexol Process Summary The Selexol process is a proven licensed technology Selexol technology has unique capabilities for acid gas removal applications Relative selectivity allows for high quality project specific product streams Effective removal of all sulfur species Simultaneous dehydration of feed streams Can be an economically attractive option for Natural Gas applications UOP can assist you in optimizing and maximizing the value of your project UOP 5241B-37

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