Influence of H2O, HCl and H2S on the release and condensation of trace metals in gasification

Autor*innen

• María Benito Abascal

Parameter

• Wirtschaft

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High temperature coal utilization processes like gasification release hazardous heavy metals into the atmosphere, adversely affecting the environment and human health while causing operational issues in gasification plants. These trace metals, present in coal at parts per million levels, contribute to significant annual environmental pollution. Thus, developing cleaner and more efficient techniques for next-generation coal power plants is crucial. The Integrated Gasification Combined Cycle (IGCC) process, featuring integrated hot gas purification and CO2 separation, shows promise for increasing efficiency and reducing heavy metal emissions through hot fuel gas cleaning. Understanding the behavior of trace metals during gasification is vital for developing effective cleanup techniques. Previous studies indicate that the chlorine, sulfur, and moisture content of fuels significantly influence trace metal behavior. This research experimentally investigates the effects of steam, HCl, and H2S on the release and condensation of Zn, Cd, Pb, As, Sn, and V. The condensation behavior of heavy metal vapors was analyzed in a heated flow channel reactor, while the release of inorganic vapors was examined using a molecular beam mass spectrometer (MBMS) for in-situ gas analysis. Results were compared with “Scheil-Gulliver Cooling” calculations from FactSage 6.3, and thermodynamic pseudo-equilibrium calculations were performed to predict heavy

• Sprache: Englisch
• Erscheinungsdatum: 2016