Co-firing of steam coal with high sulfur content lignite in a bubbling fluidized bed combustor

Date

2005-05-25

Author

Selçuk, Nevin
Altindag, Hakan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

111
views

0
downloads

Combustion and emission behavior of 100 % steam coal (SET 1) and a mixture of 80 % by weight steam coal and 20 % by weight local lignite, characterized by high sulfur and ash contents, (SET 2) were investigated in the 0.3 MW, Middle East Technical University (METU) Atmospheric Bubbling Fluidized Bed Combustor (ABFBC) Test Rig. Experiments were performed with limestone addition at various Ca/S molar ratios with fines recycle. In both sets of experiments, parameters other than Ca/S molar ratio were held as nearly constant as possible. On-line measurements Of O-2, CO2, COx SO2, NOx emissions were carried out. Comparisons between the emissions show that lower NOx and SO2 emissions are obtained from combustion of steam coal/lignite mixture compared to those from steam coal only despite higher sulfur and almost equal nitrogen contents of the mixture. Calculated combustion efficiencies were found to be around 98 and 96 % for SET I and SET 2, respectively. As for the sulfur retention efficiencies, up to three times higher efficiencies were achieved when steam coal is co-fired with high sulfur lignite.

Subject Keywords

Steam coal, Lignite, High sulfur, Co-firing, Fluidized bed combustion

URI

https://hdl.handle.net/11511/55873

Conference Name

18th International Conference on Fluidized Bed Combustion

Collections

Graduate School of Natural and Applied Sciences, Conference / Seminar

Suggestions

OpenMETU
Core

Co-firing of olive residue with lignite in bubbling FBC Gogebakan, Zuhal; Gogebakan, Yusuf; Selçuk, Nevin (2008-01-01) The effect of biomass share on gaseous pollutant emissions from fluidized bed co-firing of various biomass fuels with high calorific value coals have extensively been investigated to date. However, effect of co-firing of olive residues with low calorific value lignites having high ash and sulfur contents has not been studied in bubbling fluidized bed combustors. In this study, experimental results of various runs pertaining to gaseous emissions (O2, CO2, CO, SO2, NO, N2O) from METU 0.3 MWt Atmospheric Bubbl...
Modeling of a bubbling AFBC with volatiles release Selçuk, Nevin; Gogebakan, Y (2003-03-01) comprehensive model for continuous combustion of lignite with wide size distribution burning in its own ash in an atmospheric bubbling fluidized bed combustor (ABFBC) has been presented and used to correlate the data from a 0.3 MW ABFBC test rig. The model consists of submodels for hydrodynamics, volatiles release and combustion, char combustion, particle size distribution, entrainment and elutriation and is based on conservation equations for energy and chemical species. The volatiles release model is base...
Co-combustion of coal and olive cake in a fluidized bed with limestone addition and freeboard extension Akpulat, Onur; Atımtay, Aysel; Department of Environmental Engineering (2009) In this study, flue gas emissions and combustion efficiencies during combustion and co-combustion of olive cake and coal are investigated in a bubbling fluidized bed with an inside diameter of 102 mm and a height of 900 mm and 1900 mm. Tunçbilek lignite coal and Edremit olive cake were used in the experiments as fuels. Temperature distributions along the combustion column were continuously measured. Flue gas concentrations of O2, CO, SO2 and NOx were measured during combustion experiments. Four sets of expe...
Analysis of material collected on particles exposed to volatile matter of bituminous coal in a fluidized bed Vural, H (1997-05-01) The activity of fluidized bed particles towards the volatile matter of a bituminous coal was analysed by measurement of tar yield and the direct measurement of CO2 concentration in the exhaust gas from the devolatilization of bituminous coal particles in a laboratory-scale fluidized bed reactor. In a third approach, thermogravimetric analysis (t.g.a.) of the fluidizing particles was performed, indicating that calcium-containing particles exhibited the largest weight loss. In a fourth approach, a mass spectr...
Sulfur capture for fluidized-bed combustion of high-sulfur content lignites Altindag, H; Gogebakan, Y; Selçuk, Nevin (2004-12-01) Sulfur release and capture behavior of lignites with highly combustible sulfur-contents were investigated by extending a previously-developed comprehensive model to incorporate sulfur retention. The predictive performance of the model was tested by comparing the model predictions with on-line concentration measurements of O-2, CO2, CO and SO2. Favorable comparisons are obtained between the predicted and measured concentrations of gaseous species along the combustor. Results show that freeboard sulfur-captur...

Citation Formats

N. Selçuk and H. Altindag, “Co-firing of steam coal with high sulfur content lignite in a bubbling fluidized bed combustor,” presented at the 18th International Conference on Fluidized Bed Combustion, Toronto, CANADA, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55873.