Selenium (Se) is a contaminant in effluents from coal mines and coal-fired power stations, where it is encountered as the oxyanion selenate (SeO4(2-), hereafter Se(VI)). Se(VI) can be removed from solution with Fe-treated biosorbents, but the efficacy of these treatments in effluents with multiple contaminants is unclear. This study investigates the interactions between Se(VI) and the oxyanions...

An accurate understanding of molecular structure evolution during pyrolysis is essential for the clean utilization coal. In this study, middle-rank coal was taken as research subject, and vitrinite inertinite samples were stripped from using a hand picking sink–float separation process. situ Fourier transform infrared (FTIR) spectroscopy in X-ray diffraction (XRD) performed to compare macromole...

Soot samples, including the associated organics, produced from an Illinois No. 6 coal (five samples) and two model compounds, biphenyl (three samples) and pyrene (two samples), have been studied by 13C NMR methods. The coal soot data served as a guide to selection of the temperature range that would be most fruitful for investigation of the evolution of aerosols composed of soot and tars that a...

Biomass was subjected to conventional and microwave pyrolysis, to determine the influence of each process on the yield and composition of the derived gas, oil and char products. The influence of pyrolysis temperature and heating rate for the conventional pyrolysis and the microwave power was investigated. Two major stages of gas release were observed during biomass pyrolysis, the first being CO...

Coal spontaneous combustion (CSC) is a serious threat to the safe mining of coal resources, and selection suitable gas indicators predict CSC state crucial for prevention control mine fires. In this paper, temperature-programmed experiment was first carried out analyze components compositions in oxidative pyrolysis process three samples (lignite, long-flame coal, lean coal) with different coali...