Innovative H 2 S Gas Treatment Technology 2016 Gasification and Syngas Technologies Conference

Transcription

1 Innovative H 2 S Gas Treatment Technology 2016 Gasification and Syngas Technologies Conference Peter Ristevski, P.Eng. peterr@macrotek.com

2 Agenda Introduction to Macrotek Products and Services with focus on SULFCAT SULFCAT Development SULFCAT Process Description Test Results Summary 2

3 Products & Services Macrotek Wet Scrubbers Fabric Filters Dry Scrubbers Other Equipment Engineering Systems 3

4 Gasification Process Feed Gasifier Gas Cleanup Usable Syngas

5 Experience with Syngas Cleanup Started with Resorption pilot scale in mid 1990 s Slip stream for the Resorption Spain joint venture Design, supply, retrofit and operation of many different configurations for Plasco full scale demo ( ) Design for Plasco Ottawa commercial Preliminary design for Port Fuels and Materials Services Inc., Hamilton

6 Syngas Cleanup Challenges Gas Conditioning Particulate Heavy metals Tars Acids (HCl, SO 2 ) Ammonia Sulphur (H 2 S)

7 Syngas Cleanup Options Quench Venturi Absorber/Cooler H 2 S System Quench Venturi WESP Absorber/Cooler H 2 S System Quench Absorber/Cooler Baghouse H 2 S System Cooler Baghouse Absorber/Cooler H 2 S System

8 H 2 S Cleanup Options Bio Gas Chemical Scavenger Regenerative Targeted for wastewater plants Sodium hypo and sodium peroxide Proven, however too costly (reagent and disposal) Solids generally effective, but only costeffective at low loadings Liquids tend to be hazardous and have cost limitations Disposal can be costly Higher Capital cost Low operating cost Very short payback in most cases when compared to other options

9 Development of SULFCAT Macrotek embarked on major development program for regenerative system for H 2 S Removal. Our focus is small-medium size range projects with the following objectives and targets: Effective and Reliable H 2 S Removal Low Reagent Cost NO Licencing Fees Low System Cost

10 Development of SULFCAT 2012: Macrotek teamed with leading chemical R&D developer and gasification partner 2013: Proof of concept lab scale confirmed viability of chemistry Late 2013: Secured significant external funding Early 2014: Further simulations of the chemistry produced promising results Mid 2014: Designed and built slip stream pilot at major gasification demonstration project Late Present: Designed, built and operating pilot system at Macrotek facility

11 SULFCAT Process Description

12 SULFCAT Model Layout Settling Tank Oxidation Vessel Control Panel Absorber Filter Press

13 SULFCAT Pilot: Oxidation & Settling

14 SULFCAT Pilot: Absorber

15 Overall Reaction H 2 S (g) + ½ O 2(g) S (s) + H 2 O (l) Reagent is not consumed by reaction Oxygen is supplied as air from blower

16 Removal Efficiency Removal Efficiency vs. ph 100% 80% 60% 40% ph 8.5 ph 9 ph % 0% Number of Stages

17 Removal Efficiency Performance 100% 80% 60% 40% Packed Bed Mobile Bed Spray 20% 0% Scrubber Liquid Flow

18 Predicted Efficiency Efficiency Model 100% 80% 60% 40% 20% 0% 0% 20% 40% 60% 80% 100% Experimental Efficiency

19 Reaction Cycles Reaction Cycles Operating ph

20 Comparison for Spray, Packed, Mobile Bed Spray Tower Packed Bed Mobile Bed Resistant to plugging Low pressure drop Low recirculating liquid flowrate Improved mass transfer High residence time

21 Results Accomplishments during first 2 years of testing: Key operating parameters established for absorber (spray, packing, moving bed) Performance and critical process relations Chemistry and reagent optimization Operating experience (what to do and what not to do) Equipment selection Summary: The extensive testing has provided framework to design system with high confidence level.

22 Summary Macrotek has developed, designed, and installed a complete range of syngas treatment technologies and highlights the importance of combining these with the H 2 S package. Macrotek has proven the performance of SULFCAT advanced, technology for the removal of H 2 S gas. Macrotek is implementing SULFCAT into its systems for operating plants.

23 Macrotek Inc. 421 Bentley Street, Unit 1 Markham, Ontario L3R 9T2 Tel: Toll Free: peterr@macrotek.com