Oxy-fuel Combustion :Fundamentals, Theory and Practice

Publication subTitle :Fundamentals, Theory and Practice

Author: Zheng   Chuguang;Liu   Zhaohui  

Publisher: Elsevier Science‎

Publication year: 2017

E-ISBN: 9780128123225

P-ISBN(Paperback): 9780128121450

Subject: TM621.2 boiler and combustion system

Keyword: Environmental science, engineering & technology

Language: ENG

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Description

Oxy-fuel Combustion: Fundamentals, Theory and Practice provides a comprehensive review of various aspects of oxy-fuel combustion technology, including its concept, fundamental theory, pilot practice, large-scale feasibility studies and related practical issues, such as the commissioning and operation of an oxy-fuel combustion plant. Oxy-fuel combustion, as the most practical large-scale carbon capture power generation technology, has attracted significant attention in the past two decades. As significant progress has been achieved in worldwide demonstration and the oxy-combustion concept confirmed by Schwartze Pump, CUIDEN, Callide, Ponferrada and Yingcheng projects in the past five years, this book provides a timely addition for discussion and study.

  • Covers oxy-fuel combustion technology
  • Includes concepts, fundamentals, pilots and large-scale feasibility studies
  • Considers related practical issues, such as the commissioning and operation of an oxy-fuel combustion plant
  • Focuses on theories and methods closely related to engineering practice

Chapter

1.1.2 Status of CCS

1.1.3 CO2 Capture Technologies

1.1.4 The Concept and Components of Oxy-fuel Combustion Technology

1.2 A Brief History of Oxy-fuel Combustion

1.2.1 R&D History of Oxy-fuel Combustion

1.2.2 Opportunities With Oxy-fuel Combustion

1.3 Challenges for Oxy-fuel Combustion

1.3.1 Boiler Design

1.3.2 Oxygen Production

1.3.3 CO2 Purity Requirements and Flue Gas Cleaning

1.3.4 Process Integration

1.4 About This Book

References

Chapter 2: Fundamentals of Oxy-fuel Combustion

2.1 Introduction

2.2 Effects of CO2 on Combustion Characteristics

2.2.1 Burning Velocity in O2/CO2 Atmosphere

2.2.2 Adiabatic/Maximum Flame Temperature in O2/CO2 Atmosphere

2.2.3 Ignition, Extinction, Flammability, and Flame Instability in O2/CO2 Atmosphere

2.2.4 Flame Radiation in O2/CO2 Atmosphere

2.3 Effects of CO2 on Reaction Kinetics

2.4 Factors Affecting Oxy-Fuel Combustion Behavior

2.5 Summary

References

Chapter 3: Coal Ignition in Oxy-fuel Combustion Environment

3.1 Introduction

3.2 Numerical Simulation of the Ignition Process of Pulverized Coal in O2/CO2 Environments

3.2.1 Modeling Approach

3.2.2 Validation of the Model

3.2.3 Ignition Mechanisms

3.2.4 Homogeneous Ignition Process

3.2.5 Heterogeneous Ignition Process

3.3 Effects of CO2 on the Ignition of Pulverized Coal

3.3.1 Validation of the Model

3.3.2 The Chemical Effect of CO2 on the Homogeneous Ignition of Pulverized Coal at O2/CO2 Environments

3.3.3 The Effect of CO2 on the Heterogeneous Ignition of Pulverized Coal at O2/CO2 Environments

3.4 Effects of H2O on the Ignition of Pulverized Coal

3.4.1 Experimental

3.4.2 Experimental Results

3.4.3 Modeling

3.4.4 Validation of the Model

3.4.5 Effect of Steam Physical Properties

3.4.6 Effect of Steam Chemical Properties

3.5 Summary

References

Chapter 4: Pulverized Coal Combustion Characteristics in Oxy-fuel Atmospheres

4.1 Introduction

4.2 The Relationship Between Pulverized Coal Properties and Characteristic Temperatures

4.2.1 Samples and Experimental Process

4.2.2 Combustion Curves of Different Coals in O2/CO2 Atmosphere

4.2.3 Effect of Proximate Analysis, Ultimate Analysis, and Mineral Elements on Characteristic Temperature

4.2.4 Conclusions

4.3 Effect of H2O on the Combustion Characteristics of Pulverized Coal in an Oxy-Fuel Atmosphere

4.3.1 Coal Sample Preparation and Experimental Process

4.3.2 Effect of H2O on the Combustion Behaviors of Coal

4.3.3 Conclusions

4.4 Influence of Evolution of Coal Char Structure on Characteristic Temperature

4.4.1 Sample Preparation and Experimental Methods

4.4.2 Analysis Instruments and Carbon Burnout Rates of Char

4.4.3 SEM Analysis

4.4.4 Pore Structure Analysis

4.4.5 Raman Analysis

4.4.6 Combustion Reactivity Analysis

4.4.7 Conclusion

References

Chapter 5: Nitrogen and Sulfur Behavior During Oxy-fuel Combustion and Its Retention

5.1 Introduction

5.2 NO Formation and Emission During Oxy-Fuel Combustion

5.2.1 Influence of the Increased CO2 Concentration

5.2.2 Influence of the Recycled NO

5.2.3 Influence of Coal Rank

5.2.4 Homogeneous and Heterogeneous Contributions of CO2 and Recycled NO

5.3 Modeling of NOx Conversion Using Detailed Chemical Kinetics

5.4 SO2 Formation and Emission During Oxy-Fuel Combustion

5.4.1 The Behaviors of Organic and Inorganic Sulfur Transformation

5.4.2 The Effect of Indigenous Minerals on Transformation of Organic and Inorganic Sulfur

5.4.3 The Effect of Added Minerals on the Transformation of Organic and Inorganic Sulfur

5.4.4 SO2 Emission During Oxy-fuel Combustion

5.4.5 Summary

5.5 SO3 Formation and Emission During Oxy-Fuel Combustion

5.5.1 Influence of Temperature on SO3 Formation

5.5.2 Homogenous Effects on the Conversion of SO2 to SO3

5.5.3 Heterogeneous Effects on the Conversion of SO2 to SO3

5.5.4 SO3 Concentration and Acid Dew Point Temperature Calculation Formula Developments

5.5.5 Summary

5.6 Efficient Desulfurization During Oxy-Fuel Combustion

5.6.1 Calcination and Desulfurization Mechanism of Limestone Under Oxy-fuel Combustion

5.6.2 Efficient In-Furnace Desulfurization and Influence of Combustion Conditions and Sorbent Properties in O2/CO2 ...

System Approach Using Theoretical Analysis on Desulfurization

Influence of O2 Purity on Desulfurization Efficiency

Desulfurization Efficiency at Various Initial O2 Concentrations

Desulfurization Efficiency at Various Temperatures

Influence of Ca/S Ratio

Influence of Sorbent Size on Desulfurization Efficiency

Influence of Sorbent Property

5.6.3 Summary

References

Chapter 6: Mineral Behavior During Oxy-fuel Combustion

6.1 Introduction

6.2 Ash Formation During O2/CO2 Combustion of Pulverized Coals

6.2.1 Size Distribution of Submicrometer Particles

6.2.2 Element Distribution of Submicrometer Particles

6.2.3 Composition and Size Distribution of Fly Ash

6.3 Transformation Behavior of Iron-Containing Minerals During Oxy-Fuel Combustion

6.3.1 Pyrite Transformation in High CO2 Concentration

6.3.2 Effect of H2O on Pyrite Thermal Decomposition During Oxy-fuel Combustion

6.3.3 Transformation Pathway of Pyrite Thermal Decomposition in Oxy-fuel Combustion

6.4 Characteristics of Ash Melting and Slag in Oxy-Fuel Conditions

6.4.1 Samples and Experiment

6.4.2 Mineral in Coal and LTA

6.4.3 Thermal Analysis of Coal and LTA

6.4.4 Thermal Behavior in Different Atmospheres

6.4.5 Vaporization of Mineral Elements

References

Chapter 7: Mercury Behavior and Retention in Oxy-fuel Combustion

7.1 Introduction

7.2 Hg Partition During Oxy-Fuel Combustion

7.3 Field Measurement of Hg Distribution During Oxy-Fuel Combustion

7.4 Hg Removal in Oxy-Fuel Flue Gas

7.4.1 Mercury Oxidation Over Selective Reduction of NOx (SCR) Catalysts

7.4.2 Mercury Removal by Carbon-Based Sorbents

7.4.3 Mercury Removal by Metal Oxides [47]

7.5 Effect of Hg on Oxy-Fuel CO2 Compression

7.6 Summary

References

Chapter 8: Flame Characteristics of Oxy-fuel Combustion and Burner Design

8.1 Introduction

8.2 Design Principles of Conventional Pulverized Coal Burner

8.2.1 Combustion Modes

8.2.2 Swirl Burner Aerodynamics

8.2.3 Design Parameter of Swirl Burner Characteristics

8.3 Flame Features of Oxy-Fuel Burner

8.4 Oxy-Fuel Burner Design Practices

8.4.1 Design Principle for Oxy-fuel Burner

8.4.2 The Realistic Oxy-Coal Burners

8.5 Summary

References

Chapter 9: Heat Transfer During Oxy-fuel Combustion and Boiler Design

9.1 Introduction

9.2 Convective Heat Transfer

9.3 Radiative Properties of Gases and Particles

9.3.1 The Gas Radiative Models

9.3.2 The Particle Radiation

9.4 0-Dimensional Calculation Method

9.5 Heat Transfer in Oxy-Fuel Combustion Facilities

9.6 Summary

References

Chapter 10: Pilot and Industrial Demonstration of Oxy-fuel Combustion

10.1 Introduction

10.2 Small Pilot Facilities

10.3 Large Pilot Facilities

10.3.1 Vattenfall's Schwarze Pumpe Pilot Plant (Germany)

10.3.2 Total's Lacq Pilot Plant (France)

10.3.3 CIUDEN's Technology Development Facilities (Spain)

10.3.4 COSPL's Callide Oxyfuel Project (Australia)

10.3.5 HUST Industrial Project for 35 MWth Oxyfuel Pilot Plant (China)

10.4 Learning From Small and Large Pilot Plants Oxy-Fuel Combustion

10.4.1 Emission of NOx and SO2

10.4.2 Recommendations for Amplification

10.5 Summary

References

Chapter 11: System Integration and Optimization for Large Scale Oxy-fuel Combustion Systems

11.1 Introduction

11.2 Process Characteristics

11.2.1 Steady-State Model

11.2.2 Simulation Results

11.3 Exergy Analysis

11.3.1 Methodology

11.3.2 Exergy Assessment

11.4 Process Integration and Optimization

11.4.1 Process Integration

11.4.2 Process Optimization

11.5 Techno-Economic Evaluation

11.5.1 Calculation Method and Assumptions

11.5.2 Results Analysis

11.6 Summary

References

Chapter 12: Control Concepts, Dynamic Behavior and Mode Transition Strategy for Oxy-fuel Combustion Systems

12.1 Introduction

12.2 Dynamic Modeling and Simulation

12.2.1 Pilot Facility

12.2.2 Commercial-Scale Plant

12.2.3 Subsystems

12.3 Control Concepts

12.3.1 Pilot Facility

12.3.2 Commercial Plant

12.4 Dynamic Behavior

12.4.1 Pilot Facility

12.4.2 Commercial Plant

12.5 Mode Switching Strategy

12.5.1 Pilot Facility

12.5.2 Commercial Plant

12.6 Summary

References

Chapter 13: Oxygen Production for Oxy-fuel Combustion

13.1 Introduction of Cryogenic Air Separation Unit

13.2 Chemical Looping Process of Perovskites for High Temperature O2/CO2 Production

13.2.1 Introduction of Perovskites for O2/CO2 Production

13.2.2 Characteristics and Performance of Ba-Sr-Co-Fe-Based Perovskites

13.2.3 Effect of A/B-Site Substitution on Oxygen Production Performance

13.3 Chemical Looping Process of Cu-Based Carrier for High Temperature O2/CO2 Production

13.3.1 Zr-Doped Cu-Based Oxygen Carrier for O2/CO2 Mixed Gas Production

13.3.2 Influencing Mechanism of Zr Doping on O2 Release of CuO

13.4 Summary

References

Further Reading

Chapter 14: MILD Oxy-fuel Combustion

14.1 Introduction

14.2 Physical and Chemical Effects of CO2 Addition on MILD Oxy Combustion

14.2.1 Physical Effects

Density

Kinematic Viscosity

Specific Heat Capacity

Thermal Conductivity

14.2.2 Chemical Effects

Ignition Delay

Adiabatic Equilibrium Temperatures

Reaction Heat Releases

14.3 Establishments of MILD Combustion Diluted by CO2 and N2

14.3.1 Experimental Observations

14.3.2 Numerical Investigation

14.4 General Suggestion for Burner Design of MILD Oxy Combustion

14.5 MILD Oxy Combustion of Pulverized Coal

14.5.1 Experimental Details

14.5.2 MILD Burners and Flow Patterns

14.5.3 Establishment of the Coal MILD Combustion and the Appearances

14.5.4 Temperature and Species Distributions

14.5.5 Exhaust Emissions and Burnout

14.6 Summary and Conclusions

Acknowledgments

References

Chapter 15: Oxy-Steam Combustion

15.1 Introduction

15.2 Ignition of Pulverized Coal in O2/H2O Atmospheres

15.2.1 Coal Sample

15.2.2 Experimental Equipment

15.2.3 Experimental Results

Dynamic Behavior of Ignitions

Particle Temperature

Ignition Distance

15.3 Effects of H2O on the Ignition of Pulverized Coal

15.4 Summary

References

Chapter 16: Chemical Looping Combustion

16.1 Introduction

16.2 OC Preparation and Characterization

16.2.1 Fe2O3/Al2O3 Preparation by Sol-Gel Combustion Synthesis

16.2.2 Preliminary Characterization of the SGCS-Prepared Fe2O3/Al2O3 OC

16.3 Characteristics of Coal-Fueled CLC

16.3.1 Reaction Characteristics of Coal-Fueled CLC

16.3.2 Oxygen Ulitilzation During Coal-Fueled Chemcial Looping Combustion

16.3.3 Molecular-Scale Investigation on the Coal-Fueled CLC

16.4 Sulfur Evolution and Interaction Mechanism With OC

16.5 Minerals Evolution During Coal-Fueled CLC

16.6 Summary

References

Index

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