Description
Combustion of Pulverised Coal in a Mixture of Oxygen and Recycled Flue Gas focuses on a niche technology, combustion of coal in an oxygen rich environment, which is one approach to obtaining ‘clean coal,’ by making it easier to capture carbon that is released in the combustion process. Toporov’s book breaks ground on covering the key fundamentals of oxycoal technologies, which have not yet been covered in this depth.
Combustion of Pulverised Coal in a Mixture of Oxygen and Recycled Flue Gas summarizes the main results from a pioneering work on experimental and numerical investigations of oxyfuel technologies. It provides the theoretical background of the process, the problems to be faced, and the technical solutions that were achieved during these investigations.
- Summarizes results from investigations of oxyfuel technologies performed at Aachen University, Germany
- Provides theoretical background, as well as the primary problems of these technologies and how they can be solved
Chapter
2 Coal Combustion Technologies
2.1 Coal demand and coal reserves worldwide
2.2 Coal utilisation processes
2.3 Clean coal technologies
2.3.1 Particulate control
2.4 Carbon capture and storage technologies
Part I: Theoretical Aspects
3 Theoretical Aspects of Burning Pulverised Fuel in CO2 Atmosphere
3.1 Differences between air and oxyfuel combustion
3.2 Coal devolatilisation and particle ignition
3.2.1 Devolatilisation mechanisms and features
3.2.2 Coal particles ignition
3.2.3 Effects of CO2 on coal devolatilisation and on particle ignition
3.3 Heterogeneous reactions
3.3.1 Factors influencing the reactivity of coal char
3.3.2 Factors influencing the char reaction rates
3.3.3 Char reaction rates in CO2/O2 atmosphere
3.4 Combustion of volatiles in CO2/O2 atmosphere
3.5 Emissions from combustion of pulverised coal in CO2/O2 atmosphere
3.6 Heat transfer in RFG/O2 atmosphere
3.6.1 Radiative properties of CO2 and water vapour
3.6.2 Dry and wet recycle and the effect on the radiative heat transfer
3.6.3 Dry and wet recycle and the effect on the convective heat transfer
4 Mathematical Modelling and Model Validations
4.1 Turbulent combustion modelling
4.2 Coal particle modelling
4.2.1 Devolatilisation models
4.2.2 Char burnout models
4.3 Modelling of thermal radiation
4.3.1 Radiative properties of walls
4.3.2 Modelling of gas emissivity
5 Gaseous Combustion in CO2/O2 Atmosphere
5.1 Test facility for flameless gas combustion
6 Coal Combustion in CO2/O2 Atmosphere
6.1 Oxycoal pilot-scale furnace
6.2 Burner design and flame stability
6.2.1 Development and tests of oxycoal swirl burners
6.2.2 Measures for oxycoal swirl flame stabilisation
6.3 Oxycoal swirl flame properties
6.3.1 Measurement techniques
6.3.2 Operating conditions
6.3.3 Detailed in-flame measurements
6.3.4 Summary of the experimental results
6.3.5 Validation of the numerical model
6.4.1 Burner aerodynamics
7 NOx Emissions During Oxycoal Combustion
7.2 Influence of the excess oxygen ratio at the burner
7.3 Influence of oxidiser O2 concentration on NOx emissions
7.3.1 Influence of oxidiser O2 concentration in the primary stream
7.3.2 Influence of oxidiser O2 concentration in the secondary stream
7.4 Influence of primary stream momentum on NOx emissions
7.5 Influence of the burner inlet temperature on NOx emissions
7.6 Influence of burner secondary stream momentum on NOx emissions
7.7.3 In-flame NOx reduction
A.1 Global char reaction rates
A.1.1 Char-CO2 reaction rates
A.1.2 Char-steam reaction rates
B.1 Plug flow reactor program
Combustion of Pulverised Coal in a Mixture of Oxygen and Recycled Flue Gas
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