Aysel Atımtay

E-mail

aatimtay@metu.edu.tr

Department

Department of Environmental Engineering

CO2 Emission Inventory in Türkiye and Estimation of CO2 Concentration over Türkiye by Using Dispersion Modelling Can, Ali; Atımtay, Aysel; Tokdemir , Turgut (Gazi Universitesi Fen Bilimleri Dergisi Part C: Tasarim ve Teknoloji, 2025-3-24) Atmosferin yoğunluğu ve bileşiği Dünya sıcaklığını güçlü bir şekilde etkilemektedir. Sera gazı salınımı atmosfer dengesini değiştirerek ve enerjinin bir kısmını absorbe ederek hapsetmiştir. En önemli sera gazı (CO2)karbond...
Co-combustion of high and low ash lignites with raw and torrefied biomass under air and oxy-fuel combustion atmospheres Barzegar, Ramin; Yozgatlıgil, Ahmet; Atımtay, Aysel (2022-02-01) Co-combustion characteristics of high and low ash lignites blended with raw and torrefied pine woodchips were studied by Thermogravimetric Analyzer (TGA) under air and oxy-fuel conditions. The lignites were blended with bi...
Optimization of process parameters in oxygen enriched combustion of biocoal and soma lignite blends by response surface methodology Keivani, Babak; OLGUN, HAYATİ; Atımtay, Aysel (2022-01-01) Co-combustion of coal and biomass in power plants has the potential to reduce emissions compared to burning coal alone. However, the use of biomass with coal in power plants has its own limitations. For this reason, biomas...
TGA and kinetic study of different torrefaction conditions of wood biomass under air and oxy-fuel combustion atmospheres Barzegar, Ramin; Yozgatlıgil, Ahmet; OLGUN, HAYATİ; Atımtay, Aysel (2020-06-01) Combustion and oxy-fuel combustion characteristics of torrefied pine wood chips were investigated by Thermogravimetric Analysis (TGA). Three torrefaction temperatures (250, 300, and 350 degrees C) and two residence times (...
Combustion and Co-Combustion characteristics of torrefied poultry litter with lignite Atımtay, Aysel (2020-04-01) This study investigated the thermal properties and activation energies of raw and torrefied poultry litter samples in the range of 250-300 degrees C by using thermogravimetric analysis (TGA). Four heating rates, 5 degrees ...
Combustion characteristics of Turkish lignites at oxygen-enriched and oxy-fuel combustion conditions Barzegar, Ramin; Yozgatlıgil, Ahmet; Atımtay, Aysel (2019-10-01) Combustion and oxy-fuel combustion characteristics of two Turkish lignites (Orhaneli and Soma) were investigated by Thermogravimetric Analysis (TGA) method. Experiments were carried out under oxygen-enriched air and oxy-fu...
Co-combustion of biocoal and lignite in a circulating fluidised bed combustor to decrease the impact on global warming Keivani, Babak; OLGUN, HAYATİ; Atımtay, Aysel (2019-01-01) This work covers co-combustion of biocoal obtained from red pine wood chips with Orhaneli lignite in a 30 kW-thermal capacity circulating fluidised bed combustor (CFBC) system in air and oxygen-enriched atmosphere. The com...
Torrefaction of pine wood in a continuous system and optimization of torrefaction conditions Keivani, Babak; Gultekin, Selin; OLGUN, HAYATİ; Atımtay, Aysel (2018-12-01) Red pine wood particles were torrefied in a screw conveyor reactor system continuously having a capacity of 5 kg/hour. During torrefaction, operating conditions were very important. Changes in the reactor temperature and t...
Co-combustion of sewage sludge from different treatment processes and a lignite coal in a laboratory scale combustor Sever Akdağ, Ayşe; Atak, Onur; Atımtay, Aysel; Sanin, Faika Dilek (2018-09-01) One sustainable use of sewage sludge (SS) is to use it as fuel in existing coal-fired plants. Towards this end, this study evaluated thermal characteristics and co-combustion efficiency of dried SS samples from six wastewa...
Pyrolysis characteristics of Turkish lignites in N-2 and CO2 environments BARZEGAR, RAMİN; Avşaroğlu, Sevil; Yozgatlıgil, Ahmet; Atımtay, Aysel (2018-01-01) Pyrolysis characteristics and kinetic parameters of two Turkish lignites having different ash contents (Orhaneli as low ash and Soma as high ash sample) were studied under N-2 and CO2 atmospheres by means of thermogravimet...

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