A Surface Ionization Instrument for On-Line Measurements of Alkali Metal Components in Combustion: Instrument Description and Applications
| Autor: | Klas Engvall, K. O. Davidsson, Jan B. C. Pettersson, John G. Korsgren, Magnus Hagström, Benny Lönn |
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| Rok vydání: | 2002 |
| Předmět: | |
| Zdroj: | Energy & Fuels. 16:1369-1377 |
| ISSN: | 1520-5029 0887-0624 |
| DOI: | 10.1021/ef020020h |
| Popis: | An instrument for on-line measurements of alkali components in hot flue gas streams is presented. The instrument is based on surface ionization technique and is equipped with a hot sampling line used to extract flue gas for continuous alkali measurements at pressures up to 30 bar. The instrument, its support system and the calibration procedure is described. Field campaigns with the instrument have been performed at fluidized-bed combustion facilities operating under pressurized and atmospheric conditions and using several fuels, including coal, biomass, and demolition waste. The instrument performance has been satisfactory both during pressurized circulating fluidized-bed coal combustion with alkali concentrations downstream of a hot gas filter in the ppb range, and in particle-laden conditions with alkali levels up to about 10 ppm. The measured alkali concentration corresponds to the concentration of alkali components present as vapors and fine-mode particles. In systems with high levels of fluidized-be... |
| Databáze: | OpenAIRE |
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