CFD modeling of spontaneous heating in a large-scale coal chamber

Modes and kinetics of CO2 and CO production from low-temperature oxidation of coal

“…This result clearly shows that low-temperature oxidation of coal can be separated into three stages in terms of the activation energies for CO 2 or CO emission. This observation is similar to the findings of other researchers (Taraba et al, 2014;Wang et al, 2003b;Yuan and Smith, 2009). For example, Wang et al (2003b) studied CO 2 or CO emission during coal oxidation at 50-90°C and found that the threshold temperature for the thermal decomposition of peroxygen is around 70°C in terms of the ratio of CO 2 /CO production.…”

Experimental determination of self-heating and self-ignition risks associated with the dusts of agricultural materials commonly stored in silos

“…In order to safely be transported and stored, the self-heating and self-ignition phenomena in coals have been theoretically and experimentally studied by many researchers since the earliest studies of Semenov [9] and Frank-Kamenetskii [10] until the numerical 3D simulations carried out in these days [11][12][13][14][15][16][17][18][19][20]. This research has also pointed to the study of different types of wood products and biomass [21][22][23].…”

Influence of Air Supply Velocity on Temperature Field in the Self Heating Process of Coal

“…By analyzing the numerical simulation results and the experimental results obtained from spontaneous combustion test device, Deng et al (2002) obtained the change law of reaction products with time, such as coal temperature, oxygen, CO and CO 2 . In the model, Yuan and Smith (2009) added the chemical reaction source term in Arrhenius form to simulate the temperature field inside the large-scale coal pile. All of the above studies use the concept of pore porosity and permeability to describe the dynamic characteristics and analyze the energy changes by providing the local thermal equilibrium hypothesis in which the gas has the same temperature with coal particles.…”