The determination of coal combustion kinetics with thermogravimetry

A thermogravimetric analysis of the combustion of a Brazilian mineral coal

“…It can be observed from the plots that the higher the heating rate the lower the resulting activation energy in both combustion stages. Accounting for all the data for all the heating rates, the Arrhenius fits for the primary and the secondary combustion steps result, respectively (10) (11) Hakvoort et al 49 observes that the stage of reaction where volatiles combustion take place (primary combustion) is characterized by lower activation energies as compared to fixed carbon combustion alone (secondary combustion). Contrary to that, in the present work the activation energy was lower for the combustion of fixed carbon alone.…”

Thermal behavior and gaseous emission analysis during co-combustion of ethanol fermentation residue from food waste and coal using TG–FTIR

“…Some studies focused on the burning characteristic and gaseous emissions during biomass/coal co-combustion in oxidation process [13][14][15][16][17]. Otero et al analyzed the burning process for different types of sludge and determined the burning parameters for sludge mixed with charcoal.…”

“…Folgueras et al [16] utilized thermal analysis to study the relationship between the burning characteristic and ratio of the sludge and coal mixture. The burning kinetic parameters for the sludge and coal mixture were also investigated [13,17].…”

Use of a fluidized bed combustor and thermogravimetric analyzer for the study of coal ignition temperature

“…The DTG curves of both coals clearly showed such reactive events, which are identified as primary and secondary combustion steps. In the primary combustion occurs devolatilization and simultaneous fixed carbon combustion whereas in the secondary combustion only the char combustion occurs whereas in the secondary combustion only the char combustion occurs [2,40]. The DTG peaks are more pronounced in both primary and secondary combustion steps for higher values of b.…”

“…TGA tests were conducted under a non-isothermal condition for five different heating rates (10,20,30,40 and 50°C/min) for the determination of the activation energy of the combustion. The temperature ranged from room temperature up to 900°C under air atmosphere.…”