Toporov Combustion of Pulverised Coal in a Mixture of Oxygen and Recycled Flue Gas

1. Auflage 2014
ISBN: 978-0-08-100004-5
Verlag: Elsevier Science & Techn.
Format: EPUB
Kopierschutz: 6 - ePub Watermark

E-Book, Englisch, 272 Seiten

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

Dr. Dobrin D. Toporov is a Private Docent at the RWTH Aachen University, Germany and a Deputy Head of the Gasification Department at the Gas Technologies Division, ThyssenKrupp Industrial Solutions AG, Germany. He has more than ten years post-doc research experience in the field of coal combustion and gasification.

Autoren/Hrsg.

Toporov, Dobrin

Leseproben

Nomenclature

Symbol

Area  [m2]

Pre-exponential factor  [varies]

Mole fraction  [–]

Empirical coefficients in EDM  [–]

Molar concentration  [mol/m3]

Function, coefficient, constant  [–]

1, 2 Empirical coefficients in EDC  [–]

Specific heat capacity  [J/kg-K]

Diameter  [m]

Coefficient  [–]

Activation energy  [kJ/mol]

Force  [N]

? Heat of formation  [J/kg]

Heat transfer coefficient  [W/m2-K]

Radiation intensity  [W/m2-sr]

Turbulent kinetic energy  [m2/s2]

Constant  [–]

Characteristic length  [m]

, Mass  [kg]

Molecular weight  [kg/mol]

Mass flow rate  [kg/s]

, Pressure  [Pa]

Ratio  [–]

Thermal input  [W]

Stoichiometric ratio  [–]

Reaction rate  [kg/(m3 s)]

Universal gas constant  8,314 kJ/(kmol K)

Particle internal surface area  [m2]

Source terms  [varies]

Time  [s]

Temperature  [K], [°C]

, Velocity components  [m/s]

',' Fluctuation of velocity  [m/s]

Mass  [kg]

Distance  [m]

Mass fraction  [–]

Greek Letters

Absorptivity  [–]

Mass fraction  [–]

Emissivity  [–]

Effectiveness factor  [–]

Dissipation rate of turbulent energy  [m2/s3]

F Source term  [varies]

Ratio  [–]

G Diffusion coefficient  [kg/(m s)]

,? Difference operator  [–]

Particle pore diameter  [10-9 m]

Dynamic viscosity  [kg/(m s)]

Excess air ratio  [–]

Kinematic viscosity  [m2/s]

Stoichiometric coefficient  [–]

Frequency  [1/s]

Density  [kg/m3]

Reaction-rate ratio in CPD model  [–]

Time constant  [s]

Tortuosity  [–]

Shear stresses  [kg/(s2 m)]

Model constants  [–]

Stefan-Boltzmann constant  5,669 W/(m2 k)

Reaction rate  [1/s]

Abbreviations

AFT Adiabatic Flame Temperature

ASTM American Society for Testing and Materials

BFB Bubbling Fluidised Bed

BO Burnout

d.a.f. Dry Ash-Free

DIN Deutsches Institut fuer Normung

CBK Char Burnout Kinetics Model

CCS Carbon Capture and Storage

CCR Carbon Capture and Reuse

CDL Coal Devolatilisation Laboratory

CFB Circulating Fluidised Bed

CFD Computational Fluid Dynamics

CPD Chemical Percolation Devolatilisation Model

CR Conversion Ratio

EDC Eddy Dissipation Concept

EDM Eddy Dissipation Model

ER External Recirculation

ESP Electrostatic Precipitators

EWBM Exponential Wideband Model

FB Fluidised Bed

FGD Flue Gas Desulphurisation

FG-DVC Functional Group, Depolymerisation, Vaporisation, and Cross-Linking

GHG Greenhouse Gas

GCV Gross Calorific Value

IGCC Integrated Gasification Combine Cycle

IPFR Isothermal Plug Flow Reactor

IRZ Internal Recirculation Zone

KIN Kinetics

LES Large Eddy Simulation

L-H Langmuir-Hinshelwood

max Maximum

min Minimum

Mtoe Million (Mega-) Tonnes of Oil Equivalent

NMR Nuclear Magnetic Resonance

OECD Organisation for Economic Cooperation and Development

OFA Overfire Air

PFBC Pressurised Fluidised Bed Combustion

PFR Plug Flow Reactor

PM Primary Stream Momentum Ratio

ppm Parts Per Million

PS Primary Stream

RANS Reynolds Averaged Navier Stokes

RFG Recirculated Flue Gas

R/P Reserves-to-Production

SCR Selective Catalytic Reduction

SK Steinkohle

SM Secondary Stream Momentum Ratio

SS Secondary Stream

TA Thermal Annealing

TGA Thermogravimetric Analysis

TS Tertiary Stream

VM Volatile Matter

Vol Volume

URANS Unsteady Reynolds Averaged Navier Stokes

WSGGM Weighted Sum of Grey Gases Model

wt Weight

WTA Wirbelschicht-Trocknung von Braunkohle mit interner Abwärmenutzung

Dimensionless Numbers

Nusselt number

Reynolds number

Sherwood number

Subscripts

Adsorption

Related to fuel ash

Apparent

...