The construction and testing of the portable Hg(2+) ultrasonic calibrator for the control of mercury speciation systems
| Autor: | Anna Okonska, Jerzy Gorecki |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Flue gas
010504 meteorology & atmospheric sciences 010401 analytical chemistry Analytical chemistry chemistry.chemical_element Sorption Combustion 01 natural sciences 0104 chemical sciences Analytical Chemistry Mercury (element) chemistry Fly ash Ultrasonic sensor 0105 earth and related environmental sciences |
| Zdroj: | Talanta. 147 |
| ISSN: | 1873-3573 |
| Popis: | During fuel combustion mercury, as Hg(0) and Hg(2+) forms, is emitted to the atmosphere. Effective reduction of mercury emission requires applying speciation systems for emission control and research. An important part of all mercury determination and speciation systems are the calibrators. Calibrators are responsible for the accuracy of mercury determination and, in consequence, the effective reduction of mercury emission. The aim of the work was to construct a portable HgCl2 calibrator. The purpose of the device was the control of mercury speciation systems for continuous measurements and study of HgCl2 sorption. As a result of previously conducted research, the portable Hg(2+) ultrasonic calibrator was designed, constructed and tested. The ultrasonic calibrator generates a stable stream of HgCl2 (RSD=2.8% for CHg=28µg/m(3)). The correlation between theoretical and reading concentration of HgCl2 was R(2)=0.9983. The average recovery of HgCl2 was 95%. The advantages of the ultrasonic Hg(2+) calibrator are: high accuracy and selectivity, low pressure of HgCl2 stream and very low cost of production. The calibrator was successfully tested, both in the laboratory and in the power plant, during a preliminary study on HgCl2 sorption on a fly ash filter. |
| Databáze: | OpenAIRE |
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