PYROLYSIS AND COMBUSTION BEHAVIOR OF TERNARY FUEL BLENDS IN AIR AND OXY-FUEL CONDITIONS BY USING TGA-FTIR

2012-01-01
Yuzbasi, N. S.
Selçuk, Nevin
Pyrolysis and combustion tests of imported coal, an indigenous lignite, petcoke, and their 60/30/10 wt.% ternary blends were carried out in air and oxy-fuel conditions by using thermogravimetry analysis-Fourier transform infrared (TGA-FTIR). Pyrolysis results of the blend and its parent fuels show that weight loss profiles display similar trends up to 700 degrees C in both nitrogen and carbon dioxide atmospheres. However, at higher temperatures, further weight loss is observed due to char-CO2 gasification reaction in CO2 atmosphere. Combustion experiments were carried out in air, oxygen-enriched air (30% O-2/70% N-2), oxy-fuel (21% O-2/79% CO2), and oxygen-enriched oxy-fuel environments (30% O-2/70% CO2). Overall comparison of the combustion profiles indicates that the effect of oxygen concentration on combustion characteristics is more significant than that of diluting gas in the combustion environment. Deviations in experimental curves from expected behavior indicate synergy between imported coal, petcoke, and lignite during both pyrolysis and combustion of the ternary blend.
COMBUSTION SCIENCE AND TECHNOLOGY

Suggestions

Pyrolysis and Combustion Studies of Fossil Fuels by Thermal Analysis Methods Review
Kök, Mustafa Verşan (1995-02-01)
Instances where differential scanning calorimetry, thermogravimetry and differential thermal analysis have been applied to study the pyrolysis and combustion behaviour of fossil fuels (peat, lignite, bituminous coals, anthracite, oil shales, crude oils, lignite-oil mixtures, etc.) are reviewed. The literature survey showed that thermal methods were important not only theoretically but also from a practical point of view.
Air and oxy-fuel combustion characteristics of biomass/lignite blends in TGA-FTIR
Yuzbasi, Nur Sena; Selçuk, Nevin (2011-05-01)
Pyrolysis and combustion behavior of indigenous lignite, olive residue and their 50/50 wt.% blend in air and oxy-fuel conditions were investigated by using thermogravimetric analyser (TGA) combined with Fourier-transform infrared (FTIR) spectrometer. Pyrolysis tests were carried out in nitrogen and carbon dioxide environments which are the main diluting gasses of air and oxy-fuel environment, respectively. Pyrolysis results of the parent fuels and the blend show that weight loss profiles are almost the same...
Mathematical modeling of FBC'a co-fired with lignite and biomass
Moralı, Ekrem Mehmet; Selçuk, Nevin; Department of Chemical Engineering (2007)
Increasing environmental legislations on pollutant emissions originated from fossil fuel combustion and intention of increasing the life of existing fossil fuels give rise to the use of renewable sources. Biomass at this juncture, with its renewable nature and lower pollutant emission levels becomes an attractive energy resource. However, only seasonal availability of biomass and operation problems caused by high alkaline content of biomass ash restrict its combustion alone. These problems can be overcome b...
Stability analyses of the dump site culvert in Tınaz surface mine
Özcan, Ömer Can; Ünal, Erdal; Department of Mining Engineering (2003)
In this thesis, studies associated with the stability analyses of the box-shaped dump-site culvert constructed in Tınaz Surface Mine of Turkish Coal Enterprises (TKİ) are presented. In addition, stability conditions of other culvert alternatives are evaluated. Existence of creeks in a surface mining area is a significant factor to be considered in selection of dump-site location. Since, the dumped overburden material on the valley acts as a barrier and behaves like a dam causing flood problem behind the dum...
Gaseous and particulate emissions of a micro gas turbine fuelled by straight vegetable oil-kerosene blends
Chiariello, F.; Allouis, Christophe Gerard; Reale, F.; Massoli, P. (2014-07-01)
The paper reports the experimental results concerning emissions from 30 kWe commercial micro gas turbine feed with blends of straight vegetable oil with fossil fuel. Both gaseous and particulate emissions were measured at full and partial load for blends 10% v/v and 20% v/v of rapeseed and sunflower oils with JET A1 kerosene. The variations of nitric oxide and carbon monoxide emissions were taken into account to evaluate the combustor behavior at different loads and blends. The effects of the fuel compositi...
Citation Formats
N. S. Yuzbasi and N. Selçuk, “PYROLYSIS AND COMBUSTION BEHAVIOR OF TERNARY FUEL BLENDS IN AIR AND OXY-FUEL CONDITIONS BY USING TGA-FTIR,” COMBUSTION SCIENCE AND TECHNOLOGY, pp. 1152–1163, 2012, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/32053.