1. NEW SULFUR MELTING TECHNOLOGY Mark Gilbreath - USA

2. Devco -Sulfur Forming Units -EPC Contracts and PM -Modular construction methods and experience River Consulting -Engineers for Material Handling, Balance of Plant, Marine, Electrical & Controls CTI -Decades of Sulfur Technology and Operations -Former Freeport Sulfur staff experts -Proven Melter Technology

3.  Established 1979  Offices: Tulsa, OK; Al-Khobar, KSA; Doha, Qatar; Beijing, China  Owned and operated California Sulphur Company, Bay Sulfur Company & Devco Australia  Process Engineering, Project Engineering, Project Management, Project Controls, Procurement & Facilities Integration of Natural Gas & Refining Processes  Projects Range from Equipment sale to Turn-Key installation

5.  Established 1981  Offices - Columbus, OH; New Orleans, LA; Pittsburgh, PA; Tulsa, OK  230 + Designers, Engineers & Project Managers  Industries Served – Natural Gas, Refining, Power, Food, Materials Handling, Marine  Project Management  Project Controls  Multidiscipline Engineering  Design- civil, structural, mechanical, instrumentation, electrical  Control System Integration  Procurement  Estimating  Construction Management

7. 1950 Pit Melters Agitated Tank Melters 19641993 Agitated Tank Melters Internal Coils External Heat Exchangers Continuous Removal of Non-Meltables Easy Clean Out Pump Tank External Heat Exchangers Freeport Sulphur Company Freeport Research & Engineering CTI 1998 Submerged Combustion Melting

8. CTI Melter, 1,000T/d

9. MODULARIZATION – SULFUR MELTER PLANT External Heat Exchangers – NO COILS IN MELTER VESSEL Thermal efficient – small melter vessel Solids clean out during operation HEX maintenance during operation

10. Designed for 155 stph dry basis, Higher moisture, Moderate acidity No steam coils in melter vessel Based on proven concepts External Heat Exchanges (HEX) give high heat transfer coefficients Installed spare Heat Exchanger and Sulfur HEX Pump Melter tank elevated with concave bottom allows for continuous removal of melter non-meltables to the pump tank Pump tank designed for quick non-meltables removal while hot Above allows longer periods between major turnarounds resulting in higher availability Simple controls – flow rate of solid sulfur feed

11. Tank, baffles and agitator all designed to create strong vortex Liquid height to diameter ratio sized for effective agitation Solid sulphur and high temperature liquid sulphur inlet feeds both directed & mix in vortex Vortex causes immediate immersion of sulphur solids in liquid sulphur, expeditiously wetting all surfaces, melting the solids Raised tank with conical bottom and sump to collect larger non- meltable solids. Continuous underflow constantly removes non-meltables creating a “Self-Cleaning” melter.

12. High volume sulphur melting units with capacities up to 4,000 tons per day. External heat exchanger (HEX) gives high heat transfer coefficient, allowing high melting rates High circulation rate through HEX for efficient heating and melting All vessels and equipment are above ground. Vertical “in-tank” pumps. All molten sulphur is contained during unplanned shutdown. Customizable to meet specific customer requirements.

14. AIR Flow pattern of molten sulfur. Vortex formed with hot area in vortex, along bottom and side walls.

15. HEAT EXCHANGERS VS STEAM COILS FOR MELTING SULFUR 15

16. Bucket elevators and screw conveyors – stainless steel Concrete in silos - epoxy lined acid resistance concrete Silo cones - Stainless Steel lined Carbon Steel structure Melter vessel is carbon steel – ceramic brick in splash zone (top) Sulfur pump tank - carbon steel Heat exchangers -carbon steel Piping, valves, sulfur filters in contact with molten sulfur – carbon steel

17. MODULARIZATION – SULFUR MELTER PLANT Advantages: Greater estimate accuracy Controlled fabrication environment Consistent workforce -Drives quality -Controls schedule attainment Labor cost exposure reduced vs. field construction Simpler foundation design Superior material control Schedule risk reduced Relocation of Equipment would be cost effective Candidates for modularization Melter – partial modularization – partial field erected Sulfur Filters Piperacks, Utilities Motor control rooms/ control room

18. Misraq Filtration Unit

19. Silo on left – Filter modules on right

20. SUPPLEMENT INFORMATION ON FOLLOWING PAGES: Mark Gilbreath mgilbreath@devcousa.com 770.377.7348 6846 S. Canton Suite 400 Tulsa, OK 74126 USA www.houstoninterests.com

21. SUPPLEMENTAL INFORMATION Mark Gilbreath - USA

23. Truck unloading on right – Silo in Center – Lime silo and melter left.

24. Truck unloading on right – Filter modules on left

25. Piperack Foundations

26. Site View – May 2015

27. Pipe Rack Foundations

28. Silo Roof Preparation –

29. Truck Unloading Deck Steel

31. Bucket Elevator Base

32. Sulfur Tank Modules in Fabrication

33. HEX Modules Scheduled ready to ship – 4.5.2015 - 5.5.2015

34. Sulfur Filter Modules in Fabrication

36. 2x 2,000 mtpd Devco II Sulphur Forming Units 2x 2,000 mtpd Silo Feed Conveyors Structural, Instrumental & Electrical Design, Conveyor Design / Supply Process / Project Engineering, Project Management and Procurement Joint projects across multiple offices from employees in Tulsa, Columbus & Pittsburgh. Piping Design

37. Civil, Structural, Instrumental & Electrical Design Project Engineering, Project Management and Procurement Joint projects across multiple offices from employees in Tulsa, Columbus, New Orleans & Pittsburgh. 500,000 TPY Sulphur Purification Facility TIC: $78.5 MM Start date – December 13, 2012 On-line (Projected) – Jan 2015 Fabrication Plant Layout & Piping Design Project Oversight, Process / Project Engineering

38. Equipment with long deliveries Pressure Leaf Sulphur Filters: 30-46 weeks Sulphur Pumps: 36 weeks Heat Exchangers: 30 weeks Scrubber – Scrubber proprietary equipment: 36 weeks – Scrubber ID fan: 36 weeks

39. Sulfur Storage The sulfur storage system consists of two 60 ft. diameter concrete silos with elevated 50 degree cones and a screw feeder reclaim system. Each of the two silos will be designed to store 6,000 tons of sulfur at 65 pcf. The final silo design including hopper slope and height is based on material testing. – Silos equipped with elevated cones (50 degree slope) for gravity feed to the reclaim system. – The hopper are mild steel construction with a S.S. liner. – The hoppers have vibrators around the perimeter to assist with material flow. – A Screw feeder is used to feed to the melter feed conveyors at a variable rate up to 200 tph @ 65 PCF. – Openings are placed in the bottom of the silo for ventilation and access.

40. Melter Feed System The melter feed system consists of two 24” BW conveyors rated at 200 tph at 65 pcf to feed the melter. Only one conveyor is needed to feed the melter at a time assuring sulfur feed to the melter while allowing for maintenance on the conveyors. The lime storage system consists of a 12 ft. diameter welded steel silo with a target box and bin vent filter to receive hydrated lime by self- unloading trucks. The lime silo will be located in a tower over the melter feed conveyors and gravity feed the melter feed conveyors. Conveyors: – Two (2) 24” BW feed conveyors is located in an open common gallery to the melter. Lime Storage Silo: – Lime silo is 12’ diameter equipped with a bin vent filter and piping for receiving lime from self-unloading pneumatic trucks.

41. Sulfur filtering is a fairly simple process: After melting and neutralizing, dirty sulfur is collected in the filter feed tank, located next to the sulfur melter. The filter feed pumps draw sulfur from the tank and provide sufficient pressure to send sulfur through the filters and into the clean sulfur collection tank. The actual filtration is done by filter aid, which is deposited on the screens during the pre-coating process, prior to filtering. -The filter screens provide structure to hold a thin layer of filter aid in place. -As the dirty sulfur passes through the filter aid, the fine solid contaminants are too large to pass through After passing through the filters, the filtrate sulfur (clean sulfur) is collected and pumped to offsite liquid sulfur storage

46. 200 MMSCFD Gas Processing Plant Start Date – June 1, 2012 On-line – June 2013

47. Civil, Structural, Piping, Instrumentation & Electrical Design Man Hours: 23,442 Process / Project Engineering & Procurement Man Hours: 1,542 Fabrication and Construction Joint projects across multiple offices from employees in Tulsa, Columbus & Pittsburgh. 200 MMSCFD Gas Processing Plant TIC $250 MM

48. 200 MMSCFD Natural Gas Processing Plant Start date – October 8, 2012 On-line – August 2013

49. Civil, Structural, Mechanical & Electrical Design Man Hours: 25,613 Process / Project Engineering & Procurement Man Hours: 3,765 Plant Layout & Piping Design Man Hours: 13,313 Joint projects across multiple offices from employees in Tulsa, Columbus & Pittsburgh. 200 MMSCFD Natural Gas Processing Plant TIC: $350 MM Fabrication & Construction

50. Energy Transfer / Regency Red Bluff - Texas

51. SUPPLEMENT INFORMATION ON FOLLOWING PAGES: Mark Gilbreath mgilbreath@devcousa.com 770.377.7348 6846 S. Canton Suite 400 Tulsa, OK 74126 USA www.houstoninterests.com