A simple two-reactor method for predicting distribution of trace elements in combustion systems
Utilization of fossil fuels in energy production results in emissions of pollutants. Development in combustion technology has, however, during recent years focused on decreasing emissions of particulates, sulfur, and nitrogen oxides. In addition, combustion also includes a potential risk for emission of trace metals. Due to the fact that many trace elements have been identified as having a negative effect on human health and the natural environment, they have received special attention from a regulatory point of view. This paper describes a simple method for predicting the fate of eight trace elements (As, Cd, Hg, Ni, Pb, Se, V, and Zn) in combustion processes. Using the fuel composition and power plant operating conditions, the trace element concentrations in various ashes and the flue gas are determined. The method, which is based on a global equilibrium approach, describes the overall behavior of the eight trace elements successfully. Distribution/partitioning of the trace elements between the bottom ash, fly ash, and the flue gases is described and compared to measured data from a full-scale coal-fired power plant burning bituminous coal. The outcome from the prediction is actual concentrations of trace elements in main power plant streams.
- Research Organization:
- Abo Akademi Univ., Turku (FI)
- OSTI ID:
- 20006583
- Journal Information:
- Environmental Science and Technology, Vol. 33, Issue 24; Other Information: PBD: 15 Dec 1999; ISSN 0013-936X
- Country of Publication:
- United States
- Language:
- English
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