Sulfur capture for fluidized-bed combustion of high-sulfur content lignites

Altindag, H
Gogebakan, Y
Selçuk, Nevin
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-capture is enhanced significantly with recycling of elutriated sorbent particles as the sulfur release to the freeboard is significant for fuels rich in combustible sulfur.


Combustion behaviour of Turkish lignite in O-2/N-2 and O-2/CO2 mixtures by using TGA-FTIR
Selçuk, Nevin (2011-03-01)
The pyrolysis and combustion behaviour of a low calorific value Turkish lignite with high sulphur and ash content in air and oxy-fuel conditions were investigated by using non-isothermal thermo-gravimetric method (TGA) coupled with Fourier-transform infrared (FTIR) spectrometer. Pyrolysis tests were carried out in nitrogen and carbon dioxide environments which are the main diluting gases of air and oxy-fuel environment, respectively. Pyrolysis results show that weight loss profiles are almost the same up to...
Mathematical Modeling of a Bubbling Fluidized Bed Combustor Cofired with Lignite and Biomass
Külah, Görkem; Selçuk, Nevin (2010-01-01)
A comprehensive system model of fluidized bed combustor, previously developed and tested for the prediction of combustion behavior of fluidized bed combustors fired with lignite was extended for the modeling of cofiring of lignite with biomass by incorporating volatile release, char combustion, and population balance for biomass. The model predictions were validated against measurements taken on a Middle East Technical University 0.3 MWt Atmospheric Bubbling Fluidized Bed Combustor fired with lignite only, ...
Temperature evolution on Rh/Al2O3 catalyst during partial oxidation of methane in a reverse flow reactor
Simeone, M.; Menna, L.; Salemme, L.; Allouis, Christophe Gerard (2010-04-01)
Catalytic partial oxidation of methane was investigated in a reverse flow reactor with commercial Rh/Al2O3 catalyst in pellets. The process is carried out in a catalytic fixed bed reactor and switching of feed flow direction is obtained through four electrovalves synchronized in pairs. Temperature profile along the catalyst bed was measured by fast IR themiography and product composition was measured with a continuous gas analyzer.
Modeling of NOx emissions from fluidized bed combustion of high volatile lignites
Afacan, Onur; Gogebakan, Yusuf; Selçuk, Nevin (2007-01-01)
A comprehensive model, previously developed and tested for prediction of behavior of continuous fluidized bed combustors is extended to incorporate NOx formation and reduction reactions and applied to the simulation of Middle East Technical University (METU) 0.3 MW Atmospheric Bubbling Fluidized Bed Combustor (ABFBC) burning lignites with high Volatile Matter/Fixed Carbon (VM/FC) ratios in their own ashes. Favorable comparisons are obtained between the predicted and measured temperatures and concentrations ...
Combustion behavior and kinetics of a Turkish lignite blended with biomass/magnesite dust
Yousefzad Farrokhi, Farshid; Kazanç Özerinç, Feyza; Department of Mechanical Engineering (2017)
This study investigated the effect of blending on the combustion behavior of Turkish lignite blended with biomass or magnesite dust using a thermogravimetric analyzer (TGA) under air atmosphere. The lignite used in this study is Tunçbilek lignite (TL), which is blended with the biomass types; olive residue (OR) and almond shell (AS), and the inorganic industrial waste, magnesite dust (MD). The blends are composed of various weight fractions of fuels, with a constant weight fraction of molasses (10 wt. %) as...
Citation Formats
H. Altindag, Y. Gogebakan, and N. Selçuk, “Sulfur capture for fluidized-bed combustion of high-sulfur content lignites,” APPLIED ENERGY, pp. 403–424, 2004, Accessed: 00, 2020. [Online]. Available: