The atomic ratio of hydrogen to carbon can reflect the molecular composition of coal to a certain extent [23]. It is important for evaluating and predicting the physical and chemical properties of coal. Liu et al.
[24] quantified the individual carbon components of coal's molecular structure and corrected the hydrogen and carbon atom ratios. It is revealed that the thermal decomposition of oxygen-containing functional groups in coal produces a large number of reactive alkyl radicals, and the oxidation of these radicals is the internal reason for the high reactivity and self. Low-temperature nitrogen adsorption, simultaneous thermal analysis, and in situ Fourier-transform infrared spectroscopy were employed to study the pore structure, thermal behavior at different stages, and the dynamic changes of functional groups in coal.
The thermal decomposition of coal by slow heating rate is generally used to investigate carbonization of bituminous coal for coke making. It means that the thermal decomposition of coal under non-oxidizing conditions produces a residue (coke), which consists of carbon and mineral matter. In this context, this paper provides a fundamental understanding of the coal composition and its structure, water adsorption capacity of coal and the impact on the mechanical characteristics due to the chemical property changes under coal seam temperature conditions.
The results indicate that the initial temperature of thermal decomposition of Xishan coal is around 300 °C in experiments and approximately 1600 K in molecular simulations. The addition of Na 2 SO 4 advances the initial pyrolysis temperature and promotes the generation of total number and types of products. Most of the coal parameters used in the thermal decomposition model could be obtained directly from an infrared, ultimate and proximate analysis of the coal allowing prediction of thermal decomposition behavior from a general set of kinetic constants applicable to lignite and bituminous coals.
12 figures.« less. Although coal has been in use for over six hundred years, there is still no agreed. This process is also widely used for investigations of coal structure and properties [1-3].
Authors of review articles [4-6] published over the past decade noted that the rate of coal thermal dissolution depended on pro-cess conditions, composition and properties of coal and sol-vents, and many other factors. 摘要： Although coal has been in use for over six hundred years, there is still no agreed.
