Oxy-fuel combustion of pulverized coal: Characterization, fundamentals, stabilization and CFD modeling

2012 ◽  
Vol 38 (2) ◽  
pp. 156-214 ◽  
Author(s):  
Lei Chen ◽  
Sze Zheng Yong ◽  
Ahmed F. Ghoniem
Keyword(s):  
Fuel Combustion ◽  
Pulverized Coal ◽  
Cfd Modeling ◽  
Coal Characterization

WET BURNING – THE MODERN TREND IN ENVIRONMENTAL BENIGN FUEL COMBUSTION AND IN SOLUTION TO THE PROBLEM OF SUSTAINABLE DEVELOPMENT OF THE POWER GENERATION

2018 ◽  
pp. 96-117 ◽  
Author(s):  
B. S. Soroka
Keyword(s):  
Numerical Simulation ◽  
Nitrogen Oxides ◽  
Chemical Kinetics ◽  
Fuel Combustion ◽  
Transport Processes ◽  
Cfd Modeling ◽  
Furnace Chamber ◽  
Modern Trend ◽  
Atmospheric Air ◽  
No Formation

The article considers the role and place of water and water vapor in combustion processes with the purpose of reduction the effluents of nitrogen oxides and carbon oxide. We have carried out the complex of theoretical and computational researches on reduction of harmful nitrogen and carbon oxides by gas fuel combustion in dependence on humidity of atmospheric air by two approaches: CFD modeling with attraction of DRM 19 chemical kinetics mechanism of combustion for 19 components along with Bowman’s mechanism used as “postprocessor” to determine the [NO] concentration; different thermodynamic models of predicting the nitrogen oxides NO formation. The numerical simulation of the transport processes for momentum, mass and heat being solved simultaneously in the united equations’ system with the chemical kinetics equations in frame of GRI methane combustion mechanism and NO formation calculated afterwards as “postprocessor” allow calculating the absolute actual [CO] and [NO] concentrations in dependence on combustion operative conditions and on design of furnace facilities. Prediction in frame of thermodynamic equilibrium state for combustion products ensures only evaluation of the relative value of [NO] concentration by wet combustion the gas with humid air regarding that in case of dry air – oxidant. We have developed the methodology and have revealed the results of numerical simulation of impact of the relative humidity of atmospheric air on harmful gases formation. Range of relative air humidity under calculations of atmospheric air under impact on [NO] and [CO] concentrations at the furnace chamber exit makes φ = 0 – 100%. The results of CFD modeling have been verified both by author’s experimental data and due comparing with the trends stated in world literature. We have carried out the complex of the experimental investigations regarding atmospheric air humidification impact on flame structure and environmental characteristics at natural gas combustion with premixed flame formation in open air. The article also proposes the methodology for evaluation of the nitrogen oxides formation in dependence on moisture content of burning mixture. The results of measurements have been used for verification the calculation data. Coincidence of relative change the NO (NOx) yield due humidification the combustion air revealed by means of CFD prediction has confirmed the qualitative and the quantitative correspondence of physical and chemical kinetics mechanisms and the CFD modeling procedures with the processes to be studied. A sharp, more than an order of reduction in NO emissions and simultaneously approximately a two-fold decrease in the CO concentration during combustion of the methane-air mixture under conditions of humidification of the combustion air to a saturation state at a temperature of 325 K.

CFD modeling and optimal design of SiC deposition on the fuel combustion nozzle in a commercial CVD reactor

2022 ◽  
Author(s):  
Yogesh S. Bijjargi ◽  
Vijay M. Shinde ◽  
Abhisek Mudgal ◽  
Harish Kumar ◽  
N Eswara Prasad
Keyword(s):  
Optimal Design ◽  
Fuel Combustion ◽  
Cfd Modeling

scholarly journals Experimental and numerical investigation on sulfur transformation in pressurized oxy-fuel combustion of pulverized coal

2019 ◽  
Vol 253 ◽  
pp. 113542 ◽  
Author(s):  
Xiaorui Liang ◽  
Qinhui Wang ◽  
Zhongyang Luo ◽  
Eric Eddings ◽  
Terry Ring ◽  
...  
Keyword(s):  
Numerical Investigation ◽  
Fuel Combustion ◽  
Pulverized Coal ◽  
Sulfur Transformation

318 NOx emission behaviors in oxy-fuel combustion of pulverized coal

2013 ◽  
Vol 2013.62 (0) ◽  
pp. 185-186
Author(s):  
Ryo YOSHIIE ◽  
Naoki HIKOSAKA ◽  
Yoko NUNOME ◽  
Yasuaki UEKI ◽  
Ichiro Naruse
Keyword(s):  
Fuel Combustion ◽  
Pulverized Coal ◽  
Nox Emission

scholarly journals CFD Modeling of Multi-fuel Combustion of Coal and Meat and Bone Meal (MBM) in a Cement Rotary Kiln

2015 ◽  
Vol 5 (6) ◽  
pp. 353-360 ◽  
Author(s):  
W. K. Hiromi Ariyaratne ◽  
◽  
Morten C. Melaaen ◽  
Lars-André Tokheim
Keyword(s):  
Rotary Kiln ◽  
Fuel Combustion ◽  
Cfd Modeling ◽  
Meat And Bone Meal ◽  
Bone Meal

scholarly journals Simulation of nitrogen transformation in pressurized oxy-fuel combustion of pulverized coal

RSC Advances ◽  
2018 ◽  
Vol 8 (62) ◽  
pp. 35690-35699 ◽  
Author(s):  
Xiaorui Liang ◽  
Qinhui Wang ◽  
Zhongyang Luo ◽  
Heng Zhang ◽  
Kaikun Li ◽  
...  
Keyword(s):  
Kinetic Modeling ◽  
Chemical Kinetic ◽  
Nitrogen Transformation ◽  
Fuel Combustion ◽  
Pulverized Coal ◽  
Reaction Paths ◽  
N Transformation

Chemical kinetic modeling was applied to simulate N transformation in pressurized oxy-fuel combustion and key reaction paths were revealed.

Sign in / Sign up

Export Citation Format

Share Document