1. Jeremy Harris Simultaneous Reduction of PM, NOx, HC & CO From Large Stationary Diesel Engines March 21, 2006

2. OUTLINE Overview/Introduction Particulate, HC and CO Reduction - CRT ® Particulate Filter System NOx Reduction SCR Catalyst System Urea Injection System Operating Data Conclusions Acknowledgements

3. SNOW SUMMIT MOUNTAIN RESORT Courtesy of Snow Summit Mountain Resort

4. INTRODUCTION Snow Summit Mountain Resort is an isolated site Two Cummins 2700DQLA generators powered by Cummins QSK78-G6 diesel engines South Coast Air Quality Management District (SCAQMD) requires BACT for these engines Johnson Matthey elected to use a combination of SCR and patented CRT ® (Continuously Regenerating Technology) particulate filter system This combined system is marketed by Johnson Matthey as an SCRT ® system Systems commissioned late 2003

5. ENGINE BASELINE & SCAQMD EMISSION LIMITS EmissionBaseline LevelsRegulation Levels % Reduction Required Nitrogen Oxides (NOx)8.75 g/bhp-hr0.60 g/bhp-hr93.2% Carbon Monoxide (CO)0.72 g/bhp-hr0.60 g/bhp-hr16.7% Hydrocarbon (HC)0.20 g/bhp-hr0.15 g/bhp-hr25% Particulate Matter (PM)0.30 g/bhp-hr0.045 g/bhp-hr85% The maximum ammonia slip is 10 ppmvd @ 15% O2

6. SCHEMATIC OF EMISSION CONTROL SYSTEM CRT ® Filter System

7. OUTLINE Overview/Introduction Particulate, HC and CO Reduction - CRT ® Particulate Filter System NOx Reduction SCR Catalyst System Urea Injection System Operating Data Conclusions Acknowledgements

8. GENERAL DESCRIPTION OF CRT ® Johnson Matthey’s CRT ® system is a passive regenerating filter technology Upstream platinum based oxidation catalyst oxidizes CO and HC, as well as NO to NO 2 Downstream particulate filter (either cordierite or silicon carbide) traps particulate which is oxidized to CO 2 by NO 2 CO + ½ O 2  CO 2 HC + O 2  CO 2 + H 2 O NO + ½ O 2  NO 2 C + 2NO 2  CO 2 + 2NO

9. CRT ® BASICS

10. Particulate Filters Operation Requirements Ultra-low Sulfur Diesel <15PPM Sulfur NOx to PM Ratio > 15-20 Low Ash Engine Lubricating Oils Minimum Regenerating Temperature > 465 F. Data Logger to Monitor Temperature/Backpressure Conditions

11. CRTdm Diagnostic Module and Remote Display Module Extended data logging capability Stores up to 24 hours of data Continuously logs exhaust temperature & backpressure High speed RS-232 communications Maintenance alerts Programmable alarm settings

12. ENGINES AND PARTICULATE FILTER UNITS

13. OUTLINE Overview/Introduction Particulate, HC and CO Reduction - CRT ® Particulate Filter System NOx Reduction SCR Catalyst System Urea Injection System Operating Data Conclusions Acknowledgements

14. SCR CHEMISTRY Urea Decomposition: (NH 2 ) 2 CO + H 2 O  2NH 3 + CO 2 Catalytic Reduction of NO x : NH 3 + NO x + O 2  N 2 + H 2 O

15. SNOW SUMMIT SCR UNIT

16. OUTLINE Overview/Introduction Particulate, HC and CO Reduction - CRT ® Particulate Filter System NOx Reduction SCR Catalyst System Urea Injection System Operating Data Conclusions Acknowledgements

17. INJECTION SYSTEM PRINCIPLES Two fluid injection of air & urea solution ensures excellent atomization & distribution Single control unit module contains all necessary hardware & electronics for stand alone hands free automatic operation Built in redundancy for critical components

18. INJECTION SYSTEM CONTROL MODULE

20. INJECTION SYSTEM CONTROL MODULE INTERNALS

21. INJECTION SYSTEM CONTROL MODULE ELECTRONICS PC based ladder logic controllers Multiple touch screens are very user friendly and enable all operational parameters to be readily input by user. No need for external laptop for setup etc., all self contained Screens give visual reference to all parameters Modbus communications for remote monitoring CRTdm data logger fitted to monitor back pressure and temperature

22. EXAMPLE OF INJECTION SYSTEM TOUCH SCREENS

23. INJECTION LANCE Two fluid pipe in pipe arrangement - urea in center pipe Air utilized for cooling and atomization Urea and air mix in the injection nozzle Small urea droplet size facilitates the SCR reaction

24. OUTLINE Overview/Introduction Particulate, HC and CO Reduction - CRT ® Particulate Filter System NOx Reduction SCR Catalyst System Urea Injection System Operating Data Conclusions Acknowledgements

25. SOURCE TEST DATA ENGINE #1 Pollutant SCAQMD Emissions limit @15% O 2 Actual Emissions Target Reduction Achieved Reduction PM 10 0.045 g/bhp-hr<0.005 g/bhp-hr85%>90% NO x 50 ppm35 ppm93.2%>94% CO89 ppm24 ppm17%>90% VOC0.15 g/bhp-hr0.05 g/bhp-hr25%>75% NH 3 10 ppm0.01 ppmSurpassed

26. SOURCE TEST DATA ENGINE #2 Pollutant SCAQMD Emissions limit @15% O 2 Actual Emissions Target Reduction Achieved Reduction PM 10 0.045 g/bhp-hr<0.005 g/bhp-hr85%>90% NO x 50 ppm44 ppm93.2%>94% CO89 ppm4 ppm17%>90% VOC0.15 g/bhp-hr0.02 g/bhp-hr25%>75% NH 3 10 ppm0.00 ppmSurpassed

27. OUTLINE Overview/Introduction Particulate, HC and CO Reduction - CRT ® Particulate Filter System NOx Reduction SCR Catalyst System Urea Injection System Operating Data Conclusions Acknowledgements

28. CONCLUSIONS First site to require multiple CRT ® catalyst and filters housed in a single unit First site where PM control is used in conjunction with SCR on a stationary diesel engine application After almost 2 years of successful operation, the SCRT ® System demonstrates that it is readily possible to simultaneously remove HC, CO, NO x and PM with minimal ammonia slip from a large stationary diesel engine exhaust

29. ACKNOWLEDGEMENTS The authors would like to thank the following for permission to publish this work: Snow Summit Mountain Resort Cummins Cal Pacific Johnson Matthey, Stationary Source Emission Control For More Information Contact: Jeremy Harris 610-971-3110 harrisje@jmusa.com