The issue of coal spontaneous combustion greatly threatens the production safety mining, storage, and transportation. It is significant to study oxygen adsorption understand mechanism combustion. In this paper, based on fractal dimension self-similar geometry, internal pore structure modeled. Then, lattice Boltzmann method employed conduct numerical simulation in coal. Compared with existing ex...

Industrial coal combustion ashes as well as laboratory-scale experiments were used for the evaluation whether CaO, Al2O3 and Fe2O3 can help with the retention of volatile and acid-forming elements (S, Cl, Br, As and Se). Both industrial ashes evaluation and laboratory combustion experiments lead to the conclusion that CaO can efficiently help with the capture of not only S, but also of Cl, Br, ...

In this study, various organic solvents were used to prepare coal slurries and the rheological and thermal properties of coal-organic solvent slurries were examined. Solvents with molecules containing unpaired electrons (high basicity) show high extraction power and cause swelling of coal. Therefore, coal-organic solvent slurries usually showed higher viscosities compared to coal-water slurry. ...

The overall objective of this project is to carry out the fundamental research needed to develop a first-generation, structure-based model of coal char formation and combustion. Current models of char combustion and carbon burnout estimate char behavior from empirical relations based on parent coal properties. With the wide range of fuels of interest to modern combustion systems (international ...

sulfur emission from coal combustion presents many environmental problems. the techniques used to reduce the amount of sulfur in coal before combustion, include physical, chemical and biological processes.biological processes based on degradation of sulfur compounds by microorganisms offer many advantages over the conventional physical and chemical processes. the processes are performed under m...

Combustion products derived from the burning of coal are definitely capable of producing adverse human health effects. No single component of the combustion product mixture is solely responsible. Rather, effects are due to a group of compounds, both gases and aerosols, in the effluents of stationary source combustion processes. Although incompletely defined, the individual components of the gas...

Coal and coal combustion byproducts can have significant concentrations of lanthanides (rare earth elements). Rare earths are vital in the production of modern electronics and optics, among other uses. Enrichment in coals may have been a function of a number of processes, with contributions from volcanic ash falls being among the most significant mechanisms. In this paper, we discuss some of th...

The electrical conductivity of seeded (with potassium) combustion products of six varieties of Indian coal with enriched air have been analytically evaluated to investigate the feasibility of using them as working fuels for coal-tired MHD generators. The analysis takes into account the effect of sulphur and ash on the conductivity of combustion products.

Traditional technologies of solid fuels incineration account for higher level of pollutant in comparison with incineration of liquid and gas fuels. However the fraction of heat and electric power generated at coal fired thermal power plants will increase and by 2020 will have exceeded 50%. Plasma activation promotes more effective and environmental friendly power coals incineration [1]. Effecti...