Advanced Hydrogen Turbine PresentationFinal · Title: Microsoft PowerPoint - Advanced Hydrogen...

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


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


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


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


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


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


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


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


Novel PERC Design

Gas Flow

Gas Flow

Reduction

Reactions

Reduction +

OxidationReactions

NOx , NH3

CO, VOCNOX

Compounds Removed

Installed in the place of traditional SCR


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


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.


Thank you….

Advanced Hydrogen Turbine PresentationFinal · Title: Microsoft PowerPoint - Advanced Hydrogen...

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