Fluidized-bed combustion of Texas ligniteAn experimental investigation of carbon conversion and sulphur dioxide emission

Fuel ◽  
1990 ◽  
Vol 69 (5) ◽  
pp. 590-599 ◽  
Author(s):  
T WESTBY ◽  
K DANGTRAN ◽  
T EDGAR
Keyword(s):  
Experimental Investigation ◽  
Fluidized Bed ◽  
Sulphur Dioxide ◽  
Carbon Conversion ◽  
Fluidized Bed Combustion ◽  
Sulphur Dioxide Emission

Combustion of Waste Fuels in Sound-Assisted Fluidized Beds

2003 ◽  
Author(s):  
A. Cammarota ◽  
R. Chirone ◽  
M. Urciuolo
Keyword(s):  
Fluidized Bed ◽  
Sound Intensity ◽  
Carbon Conversion ◽  
Fluidized Bed Combustion ◽  
Combustion Time ◽  
Fixed Carbon ◽  
Optimum Frequency ◽  
Combustion Of Solid Fuels ◽  
Minimum Intensity ◽  
Carbon Loading

In the present work, sound-assisted fluidized bed combustion has been investigated by means of a 41mm laboratory scale apparatus fed with combustible powders of different fuels: a tyre derived fuel, a lignite and a petroleum coke. The experiments aim at studying the effect of sound intensity and frequency on carbon conversion of elutriable fines generally produced during fluidized bed combustion of solid fuels. The effectiveness of sound application is evaluated in terms of effects on bed carbon loading, carbon elutriation rate, combustion time and degree of conversion of fixed carbon. Experimental data prove that application of acoustic fields of appropriate intensity and frequency may: increase bed carbon loading and combustion time, reduce elutriation of carbon fines and increase efficiency of fixed carbon conversion. The effects are different for each fuel depending on its characteristics. A simplified model of sound-assisted fluidized bed has been developed. The model has been validated by comparing the experimental optimum intensity and frequency with calculated values of minimum intensity and optimum frequency. The present formulation of the model is useful for the design of the acoustic field to be used in sound-assisted fluidized bed combustors.

Combined-Cycle Power Stations Using “Clean-Coal Technologies”: Thermodynamic Analysis of Full Gasification Versus Fluidized Bed Combustion With Partial Gasification

1996 ◽  
Vol 118 (4) ◽  
pp. 737-748 ◽  
Author(s):  
G. Lozza ◽  
P. Chiesa ◽  
L. DeVita
Keyword(s):  
Fluidized Bed ◽  
Power Plants ◽  
Coal Gasification ◽  
Combined Cycle ◽  
Carbon Conversion ◽  
Fluidized Bed Combustion ◽  
Power Stations ◽  
Attractive Option ◽  
Partial Gasification ◽  
Partial Coal Gasification

A novel class of power plants for clean conversion of coal into power has been recently proposed, based on the concept of partial coal gasification and fluidized-bed combustion of unconverted char from gasification. This paper focuses on the thermodynamic aspects of these plants, in comparison with full gasification cycles, assessing their performance on the basis of a common advanced power plant technology level. Several plant configurations are considered, including pressurized or atmospheric fluidized-bed, air- or steam-cooled, with different carbon conversion in the gasifier. The calculation method, used for reproducing plant energy balances and for performance prediction, is described in the paper. A complete second-law analysis is carried out, pointing out the efficiency loss breakdown for both technologies. Results show that partial gasification plants can achieve efficiencies consistently higher than IGCC, depending on plant configuration and carbon conversion, making this solution a viable and attractive option for efficient coal utilization.

Texture of a limestone calcine and its reactivity with sulphur dioxide

1979 ◽  
Vol 44 (8) ◽  
pp. 2465-2473 ◽  
Author(s):  
Miloslav Hartman ◽  
Jaroslav Pata
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Fluidized Bed ◽  
Surface Area ◽  
Sulphur Dioxide ◽  
Optimum Temperature ◽  
Fluidized Bed Combustion ◽  
The Mean

A micro-grained limestone was used to study the effects of such variables as temperature and time of exposure to the gas on surface area, pore size distribution and porosity of calcined particles under the conditions applicable to a practical unit for fluidized-bed combustion and desulphurization. The mean pore size was correlated as a function of the temperature of calcination. An optimum temperature was found for the sulphation reaction of the carbonate.

Fluidized bed combustion of char pellets made from blends of shrubs and cork residues

2017 ◽  
Author(s):  
Tânia Ferreira ◽  
Carlos Alberto Catorze Pereira ◽  
Carlos Pinho ◽  
JOÃO LUÍS MONNEY DE SÁ PAIVA ◽  
Edmundo Manuel Tavares Marques
Keyword(s):  
Fluidized Bed ◽  
Fluidized Bed Combustion

Analysis of the pore structure of Longkou oil shale semicoke during fluidized bed combustion

Oil Shale ◽  
2020 ◽  
Vol 37 (2) ◽  
pp. 89 ◽  
Author(s):  
H Liu ◽  
S Feng ◽  
S Zhang ◽  
C Jia ◽  
H Xuan ◽  
...  
Keyword(s):  
Pore Structure ◽  
Fluidized Bed ◽  
Oil Shale ◽  
Fluidized Bed Combustion
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