Influence of TiO₂ addition on the structure and metallurgical properties of coke

Strength degradation mechanism of iron coke prepared by mixed coal and Fe2O3

“…The scanning angular started from 15 ° to 90 ° at a rate of 4 °/min, 0.02 °/step. Gaussian fitting is performed on the obtained XRD spectra to obtain the required information about γband and π-band (002), thereby calculating the parameter fa represents the aromaticity of mixed coal [28]. Furthermore, parameter d002, and Lc represent the coal graphitization and the coal average stacking height respectively, were calculated using full width at half maximum (FWHM) and scattering angle of π-band (002) [29,30].…”

Relationships between Combustion Behavior in Air and the Chemical Structure of Bituminous Coal during Combustion Processes

“…The samples were scanned at 4 • min −1 over an angular range of 10-90 • with a scanning interval of 0.02 • per step. The broad peak of 2θ ranging from 15 , which represents the γ-band and π-band (002-band), respectively [15,17]. From these XRD peaks, the contents of aliphatic carbon (C al ) and aromatic carbon (C ar ) were calculated using the areas of the γ-band and π band (002-band), respectively.…”

“…From these XRD peaks, the contents of aliphatic carbon (C al ) and aromatic carbon (C ar ) were calculated using the areas of the γ-band and π band (002-band), respectively. Then, aromaticity (f a ) is obtained from the following equation [15,17,18]:…”

Effects of poplar addition on tar formation during the co-pyrolysis of fat coal and poplar at high temperature

“…31 From Table 1, the oxygen content in poplar can reach 41.92%, resulting in the existence of large amounts of oxygenated compounds in poplar tar. However, the chemical structure of fat coal is composed of highly substituted and condensed aromatic structures, 32 resulting in large amounts of PAHs in fat coal tar during pyrolysis. When blending fat coal and poplar, oxygenated and aromatic compounds are the most abundant compounds in the tar samples.…”