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In this paper, we intensively investigate the influence of steam on the hetero-homogeneous joint ignition of dispersed coal particle streams in both O2/N2 and O2/CO2 conditions of an optically accessible flat-flame burner. Two differently ranked coals and one bituminous char were tested for a comparison. The effects of moisture content in the raw coal, steam content or diluents (N2/CO2) in the ambience,...
An experimental and theoretical investigation is conducted on the combustion of pulverized coal particle streams in either conventional or oxy-fuel conditions. The laboratory setup consisted of a Hencken flat-flame burner operated at the same temperatures of 1200, 1500 and 1800K in N2 and CO2 environments. The visible light detection technique and the calibrated three-color pyrometry are separately...
Mercury released from wet flue gas desulfurization (WFGD) devices can be inhibited by additives that can transfer mercury to its solid phase. However, the use of additives increases the mercury content in desulfurization gypsum, and the mercury is released again during the calcination process. In this study, NaHS, 2,4,6-trimercaptotiazine, trisodium salt nonahydrate (Na3(C3N3S3)·9H2O, or TMT) and...
A novel method using the co-pyrolysis of polyvinyl chloride (PVC) and biomass wastes (wood and paper) was adopted to synthesize chlorine on the surface of the char, and the synthesized Cl-Char composite was tested for removal of elemental mercury as a sorbent. The mercury removal efficiency of Cl-Char was much higher than that of raw char (2.5–5 times) and reached nearly 90% at 140°C. Brunauer-Emmett-Teller...
The study of angle of internal friction (ΦI) is widely prevalent due to its importance in science and engineering, and yet the quantitative description concerning the effect of granular shape on the ΦI is few. In our study, the influence of granular shape on the ΦI of various binary granular systems was investigated theoretically and experimentally with a Freeman FT4 Powder Rheometer. The results...
The flow characteristics of biomass and biomass–coal blends were demonstrated experimentally by investigating the shear properties, flow energy and aeration with a FT4 Powder Rheometer. The results show that the addition of biomass into coal has no effect cohesion strength but significantly increases the angle of internal friction. We propose an improved empirical correlation to describe the quantitative...
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