Pyrolysis of lignites and similar materials.

Eser, Semih


Pyrolysis analysis and kinetics of crude oils
Kök, Mustafa Verşan (1998-01-01)
This research presents the results of an experimental study on the determination of pyrolysis behaviour and kinetics of six crude oils by differential scanning calorimetry (DSC) and thermogravimetry (TG/DTG). Crude oil pyrolysis indicated two main temperature ranges where loss of mass was observed. The first region between ambient to 400 degrees C was distillation. The second region between 400 and 600 degrees C was visbreaking and thermal cracking. Arrhenius-type kinetic model is used to determine the kine...
Pyrolysis and combustion behaviour of various fuels in oxygen-enriched air and CO2 atmospheres
Yüzbaşı, Nur Sena; Selçuk, Nevin; Department of Chemical Engineering (2011)
Oxy-fuel combustion technology, which is based on burning coal in a mixture of oxygen and recycled flue gas (RFG), is suggested as one of new promising technologies for capturing CO2 from power plants. In this thesis study, the pyrolysis and combustion behaviour of various fuels including imported coal, petroleum coke, two different types of indigenous lignites, olive residue and their blends with different proportions in air and oxy-fuel conditions were investigated by using non-isothermal thermogravimetri...
Pyrolysis of Polyethylene over Aluminum-Incorporated MCM-41 Catalyst
Aydemir, Bugce; Sezgi, Naime Aslı (2016-01-01)
Aluminum-containing MCM-41 catalysts were synthesized in this study by impregnation of aluminum into hydrothermally synthesized MCM-41. Aluminum was loaded into the porous framework of silica with different Al/Si ratios, using aluminum isopropoxide as the aluminum source. These catalysts exhibited Type IV adsorption-desorption isotherms and had a pore diameter of 2.4nm. Aluminum species were coordinated tetra- and octahedrally in the structure of catalysts. Diffuse Reflectance Fourier Transform Infrared Spe...
BALCI, S; Doğu, Timur; YUCEL, H (American Chemical Society (ACS), 1993-11-01)
Pyrolysis kinetics of almond and hazelnut shells and beech wood were carried out using a thermogravimetric technique. Experiments were repeated for different final pyrolysis temperatures ranging from 300 to 850-degrees-C. Approximately 90% of the pyrolysis reactions were completed up to 450-degrees-C. The initial values of the activation energy of pyrolysis reaction were found to be around 22 kcal/mol for shells of almond and hazelnut. On the other hand, initial activation energy of beech wood pyrolysis was...
Yuzbasi, N. S.; Selçuk, Nevin (2012-01-01)
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 r...
Citation Formats
S. Eser, “Pyrolysis of lignites and similar materials.,” Middle East Technical University, 1978.