Emission Behaviors of Inorganic Ultrafine Particles during Zhundong Coal Oxy-Fuel Combustion with Characterized Oxygen Input Fractions Comparable to Air Combustion
作者： Xin Yu , Bin Fan , Chang Wen , Xianpeng Zeng , Jianqun Wu
DOI: 10.3390/APP8091486
关键词:
摘要: Zhundong low-rank coal is very likely to be utilized extensively in oxy-fired boilers the near future. Its PM10 (particulate matter with an aerodynamic diameter of ≤10 μm) emission behaviors during oxy-fuel combustion need carefully studied before its large-scale use. The present study examines inorganic ultrafine particles (PM0.5, ≤0.5 μm), as well air and conditions (O2/CO2) at three characterized O2 input fractions, i.e., 21, 27 32 vol.%. experiments were carried out a high-temperature drop-tube furnace (HDTF) temperature 1500 °C. results show that PM0.5 composed Na, S, Mg Ca, total fractions ~90%, while PM0.5–10 (with between 0.5 10 predominantly contains Ca (~50–65%). At oxygen (OXY21, 32), promoted fraction was found increase yields both PM0.5–10. A higher particle-burning lower CO2 promote reactions organically bound elements minerals, increasing partitioning causing increased yield PM0.5. from high similar OXY32 OXY27. mainly generated by highest four conditions.
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