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- W1844537587 abstract "Much recent effort has been focused on the development of monitoring methods to calculate the percentage of biomass in the fuel used for energy generation in power plants. One possible method is based on measurements of radiocarbon concentration in combustion gases by liquid scintillation (LS) spectrometry. Fossil fuels contain no 14 C due to their age. Therefore, after the combustion of such fuels, the resulting CO 2 contains no 14 C as well. The only source of 14 C comes from the admixture of biomass containing modern carbon. 14 C is a beta-emitting radionuclide with a maximum beta energy of 156 keV. There is no emission of gamma rays during decay; therefore, no possibility of gamma spectrometry exists. A difficult task thus is to validate the method and to calibrate it in agreement with the known amount of biomass in the fuel. For this purpose, a set of samples was prepared that were mixtures of hard coal and biomass with a known percentage of carbon. The oxycombustion method was applied for sample preparation in which the combustion of the fuel is done in pure oxygen; therefore, the combustion gas contains mostly CO 2 and steam. The CO 2 from the gas sample is then adsorbed by 3-methoxypropylamine. A known amount of this absorbent was mixed with a scintillation cocktail and measured in the LS spectrometer. In this way, a calibration curve has been obtained, allowing quantitative measurements of biomass content in the fuel." @default.
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- W1844537587 date "2014-01-01" @default.
- W1844537587 modified "2023-10-18" @default.
- W1844537587 title "Calibration of the Method for Measuring 14C in Combustion Gases" @default.
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- W1844537587 doi "https://doi.org/10.2458/56.17779" @default.
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