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Copyright © Siemens Energy 2012. All Rights Reserved.
Development of Advanced Hydrogen Turbine technology
for IGCC Plants with Low Emissions
Dr. A. Sobolevskiy, J. Marra, S. ScofieldSiemens Energy, Inc.
5th International Freiberg Conference on IGCC & XtL Technologies
Copyright © Siemens Energy 2012. All Rights Reserved.
Project Overview: Schedule
• Project Schedule
2
2005 201320112007 2008 20102006 2009 2012 2014 20162015Calendar Yr
Phase 2Base Program
Phase 3
Not yet awarded
2017 2018-2020
Phase 1
Phase 2
Additional Program
Copyright © Siemens Energy 2012. All Rights Reserved.
3
Goals2010– 2-3% pt. improvement in CC efficiency over baseline– 20-30% reduction of CC capital cost compared to
baseline– 2 ppm NOx on Syngas
2015– 3-5% pt. improvement in CC efficiency over baseline
with carbon capture– H2 Turbine with 2 ppm NOx
Project Overview: Goals and Objectives
Copyright © Siemens Energy 2012. All Rights Reserved.
IGCC Plant
CO2Sequestration
Ready
Low Emissions
Improved Efficiency
Fuel Flexibility
NG,Syngas,H2
Reduction in Plant Cost $/KW
Targeted Areas of Improvement
Project Overview: Goals and Objectives
Copyright © Siemens Energy 2012. All Rights Reserved.
Path to Meeting 2ppm Goal
Advanced High Temperature Combustor
Poly-functional Emissions Reduction
SCR System
2ppm NOx, CO
Emissions
High Plant Efficiency
Low CO2 emissionsBest fit with advanced high temperature engine.Low Plant Emissions
Robust to fuel and ambient variation.
System Level Approach is necessary to meet multidisciplinary goals
Copyright © Siemens Energy 2012. All Rights Reserved.
The scope of the current project is to develop a novel polyfunctionalemission reduction catalyst (PERC) for IGCC plants with:
• High NOx removal efficiency (target 95% +). • High selectivity to N2 in sulfur, oxygen and water rich conditions.• Fuel flexibility – NG, Syngas, H2-Fuel.• Minimal ammonia slip and ammonia salt formation.• CO reduction capabilities on NG and Syngas operation.
The development objectives are:
•Development of the design of aPERC system for IGCC plants with fuel flexibility.
•Field testing of the new PERC systemat IGCC plant operating conditions.
• Conduct a field test of the new PERC under IGCC exhaust conditions with the optimized catalyst formulation.
Current Status•Siemens PERC demonstrates high performance under IGCC conditions in the testing rig (95+ % removal).•High CO conversion – 96-98%.• Low ammonia slip - <0.5 ppm.•Ammonia salt formation downstream of Siemens PERC is substantially below one for the conventional SCR.•A new formulation is developed and commercial size PERC is ready for testing in the field to prove the performance.
Summary Current Status
Next Steps
Polyfunctional Emissions Reduction Catalytic (PERC) System
Copyright © Siemens Energy 2012. All Rights Reserved.
Current SCR and CO Catalyst Limitations
• No ammonia slip reduction capabilities • Separate CO (VOC) and NOx catalysts needed
–additional pressure drop, additional space and associated ducting cost is required for CO catalyst
• High corrosion of the HRSG downstream of SCR (ammonia sulfates & bisulfatesformation)
• Elevated SO3 and NO2 formation within CO catalyst
• Additional effort is required to reduce NOx emissions < 2 ppm with controllable NH3 slip
Copyright © Siemens Energy 2012. All Rights Reserved.
The NEW Novel PERC CapabilitiesSiemens Novel Polyfunctional Emissions ReductionThe ultimate SCR system features a step-change from conventional industrial equipment through: •Improvements in the system design to integrate CO reduction capabilities•Improvements in chemical formulation to minimize ammonia slip in the flue gases with high water and sulfur content
Results:Combined NOx, CO high reduction efficiency
NOx < 2 ppmCO, VOC < 1 ppm
Ultra low ammonia emissions < 1 ppm
Reduced emissions of CO and VOC during start up
Negligible ammonia sulfates/ bisulfates formation
Copyright © Siemens Energy 2012. All Rights Reserved.
Novel PERC Design
Gas Flow
Gas Flow
Reduction
Reactions
Reduction +
OxidationReactions
NOx , NH3
CO, VOCNOX
Compounds Removed
Installed in the place of traditional SCR
Copyright © Siemens Energy 2012. All Rights Reserved.
Long Term Testing of Novel PERC
Excellent Durability & Performance
Downstream
Upstream
NOx Removal Efficiency
8 4
8 6
8 8
9 0
9 2
9 4
9 6
9 8
10 0
0 200 400 600 800 1000 1200 1400 1600 1800 2000
Time from the Start, hours
% R
emov
al
Copyright © Siemens Energy 2012. All Rights Reserved.
Novel PERC Benefits
Beneficial implementation of the new multifunctional PERC allows the following achievements:
• Minimal emissions of NH3
• Ultra low levels of NOx, CO, and VOC emissions
• Minimal emissions of CO and VOC during start up
• Minimal corrosion of the HRSG section downstream of the SCR
• Extended operating flexibility and reduced risk of non-compliance with environmental regulations.
Copyright © Siemens Energy 2012. All Rights Reserved.
Thank you….
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