Combustion characteristics of coal briquettes. 1. Thermal features

Altun, Naci Emre
Bagci, AS
In this study, the influence of some of the most important briquetting parameters on the combustion and thermal properties of coal briquettes were studied in detail. For this purpose, briquettes with various organic (molasses, sulfide liquor, carboxyl methyl cellulose, Peridur XC3, and Peridur C10) and inorganic agents (cement and bentonite) were prepared, to be combusted in a reaction cell that was complemented with a continuous gas analyzer unit. Furthermore, using the binding agent that provided the most favorable thermal features, the effect of the binder quantity, as well as the amount of water addition, was successfully determined with fractions of 5%, 10%, and 15%. The influence of the relevant variables on the thermal behavior of the coal briquettes were expressed and investigated, using the effluent gas analysis method, by considering (i) the changes in the amounts of evolved CO and CO2 and consumed O-2 gases, as a function of temperature and time; (ii) the O-2 peak temperatures and times; and (iii) the residue that remained at the end of each run. The binder type, as well as the amount of binder agent and water addition, had a significant effect on the thermal behavior and combustion efficiency of the coal briquettes.


Thermal characterization and gasification kinetics of thrace-saray region coal
Yıldırım, Betül; Kök, Mustafa Verşan; Department of Petroleum and Natural Gas Engineering (2015)
In this thesis being up as-received and washed and dried, two different coal samples from Saray-Edirkoy field were experimented in order to determine effects of different variables as coal type, heating rate, gas flow rate, isothermal duration, gasifying medium, and final gasification temperature, on isothermal gasification profiles of the coal samples. In the scope of this study, heating rate was changed in the range of 20-50oC/min as 20, 30, 40 and 50oC/min whereas two different gas flow rate values as 60...
Combustion characteristics of coal briquettes. 2. Reaction kinetics
Altun, Naci Emre; Bagci, AS (American Chemical Society (ACS), 2003-09-01)
This study comprises the influence of the major briquetting parameters, such as binder type and amount of binder and water addition, on the combustion kinetics of the coal briquettes. In this manner, briquettes that have been prepared with different organic agents (molasses, carboxyl methyl cellulose, Peridur XC3, Peridur C10, and sulfide liquor) and inorganic agents (cement and bentonite) were combusted in a reaction cell assembly that operated in coordination with a continuous gas analyzer. Moreover, not ...
Combustion characteristics and kinetics of diesel and canola oil samples
Kök, Mustafa Verşan (2016-01-01)
In this study, combustion and pyrolysis behavior of diesel and canola oil is investigated using thermal analysis techniques known as thermogravimetry (TG-DTG) and differential scanning calorimetry (DSC) at different heating rates. Reaction regions, peak temperatures, mass loss, heat flow rates, ignition temperatures, and specific heat of diesel and canola oil samples are determined using TG-DTG and DSC data. It was observed that as the heating rate of the reactions increased, peak temperatures of the reacti...
Combustion reaction kinetics studies of Turkish crude oils
Bagci Suat, S.; Kök, Mustafa Verşan (2004-09-01)
In this research, sixteen experiments were conducted to study the combustion reaction kinetics of Turkish crude oils (Bati Raman, Camurlu, Raman, Adlyaman, Garzan, Karakus and Beykan) in a limestone medium. A mixture of the limestone and the crude oil was subjected to a controlled heating program under a constant flow rate of air. The produced gas was analyzed for its oxygen and carbon oxides contents. Although the molar CO2/CO ratios vary during low-temperature oxidation (LTO), for fuel deposition (FD) and...
Combustion kinetics of crude oils
Kök, Mustafa Verşan (Informa UK Limited, 2002-01-01)
In this research, the reaction rates related to an in-situ combustion process were investigated and the effect of heating rate and crude oil type on the reaction rates were investigated. A laboratory model was used to run reaction kinetic experiments in unconsolidated limestone packs using three different crude oils. Experiments were performed under the same pressure and airflow rate and at two different heating rates. It was observed that oxidation of crude oil porous media follows a series of reactions. T...
Citation Formats
N. E. Altun and A. Bagci, “Combustion characteristics of coal briquettes. 1. Thermal features,” ENERGY & FUELS, pp. 1266–1276, 2003, Accessed: 00, 2020. [Online]. Available: