Abstract In order to reduce carbon emissions, enhance the operational flexibility of gas turbine power plants, and fill gap in practical engineering transformation natural gas-hydrogen blended combustion heavy-duty turbines, a hydrogen blending retrofit was conducted on an F-class combined heat unit. This served examine problems chamber tempering, pulsation, NO x emission increase caused by dir...

Coal spontaneous combustion often occurs in storage processes, especially for low-rank coal with high volatile materials, which may lead yard caught fire and thermal energy losses. Therefore, it is important to accurately predict the tendency under status real time. In order determine ignition point, existing methods are all using pulverized samples, adding special oxidant artificially then hea...

Thermal behaviors and combustion kinetics of Thai lignite with different SO₃-free CaO contents were investigated. Nonisothermal thermogravimetric method was carried out under oxygen environment at heating rates of 10, 30, and 50°C min⁻¹ from ambient up to 1300°C. Flynn-Wall-Ozawa (FWO) and Kissinger-Akahira-Sunose (KAS) methods were adopted to estimate the apparent activation energy (E) for the...

Abstract: Auto-ignited gel combustion process has been used for producing a red hematite-zircon based pigment. The combustible mixtures contained the metal nitrates and citric acid as oxidizers and fuel, respectively. Sodium silicate (water glass) was used as silica source for producing zircon phase. X-Ray Diffractometery, Electron Microscopy and Simultaneous Thermal Analysis were used for ...

Large eddy simulation (LES) is a promising method for numerical simulation in combustion systems. A LES attempt in a model combustor has been made, and a few important issues related to grid size, inflow condition, wall boundary conditions, physical sub-models and data sampling are discussed. Some of the numerical results are presented and compared with a comprehensive experimental database, wh...