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Institute of Chemical Process Fundamentals ASCR, v.v.i. Prague |
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(For current information click here) |
Group of Hydrodynamics and Chemistry of Incineration
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People |
Research staff: M. Puncochar, E. Fiserova, V. Gruber, V. Pekarek, V. Tydlitat, V. Vesely, L. Vlkova
Technical staff: J. Chour, J. Ullrich
PhD student: M. Syc, M. Vosecky
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Fields of research |
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Applied research |
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Research projects |
Deactivation of fly ash as a catalyst in de novo synthetic reactions producing persistent organic pollutants (POP)
(V. Pekarek, supported by GA ASCR, grant No. A4072206)
We studied the influence of combustion regimes and additives, which were injected to the flue gas, on PCDD/F formation. Further, the possibilities of inhibition of de novo synthetic reactions by changing of matrix composition were investigated. Attention has also been paid to the destruction of precursors of toxic compounds. [Refs. 2, 5, 9, 17, 18, 20]
Continuous pilot plant equipment for detoxification of persistent organic compounds (PCBs, PCDD/Fs) in fly ash, carbon absorbers and soils
(V. Pekarek, supported by GA ASCR, grant No.S4072108)
The main results of the grant, focussed on application of the basic results to praxis, verified that the constructed semi-continual detoxification apparatus for ca. 50 kg loading is more efficient as compared with laboratory experiments. Different polychlorinated toxic substances were totally detoxified more than from 99.99%. In the year 2003, the equipment was completed with a dosing device. The successful operation in semi-continuous regime confirmed the possibility of transition to continuous equipment. [Refs. 1, 15, 19]
The study of the POPs formation during combustion of used oils in commercial low-output boilers with the aim to reduce their formation
(V. Pekarek, supported by GA CR, grant No. 101/01/0830)
The oil combustion on low power boilers with evaporation or burner heating construction was studied in the co-operation with National Reference Laboratory for POP compounds in Frydek-Mistek. The main finding of the project is the fact that the boilers under study met practically all legislative limits as for POP compounds as for toxic metals. The better results were achieved unequivocally for burner heating boilers. [Ref. 4]
Click here for explanation of abbreviations used on this page.
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International cooperations |
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Visitors |
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Publications |
Original papers
1. Bures M., Pekarek V., Karban J., Fiserova E.: Dehalogenation Potential of Municipal Waste Incineration Fly Ash. II. Comparison of Dehalogenation Pathways of Fly Ash and Model Fly Ash with Thermodynamic Calculations. Environ. Sci. Pollut. Res. 10(2), 121-125 (2003).
2. Pekarek V., Karban J., Fiserova E., Bures M., Pacakova V., Vecernikova E.: Dehalogenation Potential of Municipal Waste Incineration Fly Ash. I. General Principles. Environ. Sci. Pollut. Res. 10(1), 39-43 (2003).
3. Puncochar M., Drahos J.: Entropy of Fluidized Bed - a Measure of Particles Mixing. Chem. Eng. Sci. 58(12), 2515-2518 (2003).
4. Tydlitat V., Ocelka T., Horak J.: Male kotle pro spalovani kapalnych paliv v CR. (Czech) Little Boilers in CR for Burning of Liquid Fuels. Ochrana ovzdusi 15(35), 20-23 (2003).
5. Bures M., Pekarek V., Wolf G., Puncochar M.: Thermochemical Quantities of Polychlorinated Biphenyls in Ideal Gas State. Environ. Sci. Technol., submitted.
6. Hartman M., Trnka O., Svoboda K., Vesely V.: Impediment to Gas-Porous Particle Fluidization Due to Liquid Depositing upon the Solids. Chem. Eng. Commun., submitted.
7. Hartman M., Trnka O., Svoboda K., Vesely V.: Thermal Dissociation and H2S Reactivity of Czech Limestones. Chem. Pap., in press.
8. Jochova M., Puncochar M., Horacek J., Stamberg K., Vopalka D.: Removal of Heavy Metals from Water by Lignite-Based Sorbents. Fuel, accepted.
9. Pekarek V., Grabic R., Puncochar M., Ullrich J., Fiserova E., Bures M.: Effect of Sulphur Dioxide, Hydrogen Peroxide, Sulphuric Acid and Their Mixtures on the De-novo Synthesis of PCDD and PCDF in the N2 + 10% O2 Atmosphere under Model Laboratory Conditions. Chemosphere, submitted.
10. Puncochar M., Drahos J.: Origin of Pressure Fluctuations in Fluidized Bed. Chem. Eng. Sci., submitted.
11. Schwarz J., Smolik J., Dzumbova L., Vesely V., Sykorova I., Kucera J., Havranek V.: Particulate Emissions from Fluidized Bed Combustion with Fly Ash Recirculation of Czech Lignite with and without Calcareous Additives. Fuel Process. Technol., submitted.
12. Trnka O., Hartman M., Vesely V.: Charakteristika tlakovych fluktuaci v ruznych rezimech suspenzi plyn - tuha latka. (Czech) Characteristics of the Pressure Fluctuations in Different Operation Regimes of Gas-Solid Suspensions. Chem. Listy, submitted.
Review papers
13. Hartman M., Svoboda K., Vesely V., Trnka O., Chour J.: Tepelne zpracovani cistirenskych kalu. (Czech) Sewage Sludge Thermal Processing. Chem. Listy 97(10), 976-982 (2003).
14. Hartman M., Trnka O., Svoboda K., Vesely V.: Aglomerace castic a defluidacni jevy ve fluidni vrstve. (Czech) Agglomeration of Particles and Defluidization Phenomena in the Fluidized Bed. Chem. Listy 97(9), 942-948 (2003).
Patents
15. Pekarek V., Hapala P., Fiserova E.: Zpusob dehalogenacni detoxifikace halogenovanych aromatickych a/nebo cyklickych sloucenin. (Czech) Process for Dehalogenative Detoxification of Halogen Aromatic and/or Cyclic Compounds. Pat. No. PV 2003-1220. Applied: 03.04.30.
16. Vesely V., Trnka O., Hartman M.: Zpusob rizeni a identifikace rezimu fluidni vrtstvy zrniteho materialu. (Czech) Control and Identification of a Regime of the Fluidized Bed. Pat. No. PV 314-99. Applied: 01.04.01.
Conferences
17. Pekarek V.: Technology of Catalytic Dehalogenation of POPs Compounds. International Workshop on the Non-combustion Destruction Technologies of POPs, Lectures, p. 1, Prague, Czech Republic, 15-17 January 2003.
18. Pekarek V.: Scientific Activities of the Dioxin Laboratory at ICPF. PREWIN European Network of Lectures, Lectures, p. 1, Prague, Czech Republic, 15-16 May 2003.
19. Pekarek V., Ocelka T., Grabic R.: Technology of Catalytic Dehalogenation of POPs. 1st Workshop "Persistent Toxic Substances Contamination of the European Region", Book of Abstracts, p. 145-148, Brno, Czech Republic, 10-12 November 2003.
20. Vlkova L., Pekarek V., Bures M.: Porovnani experimentalniho prubehu dechlorace pentachlorfenolu s termodynamickym vypoctem na popilku ze spaloven komunalnich odpadu. (Czech) Comparison of Pentachlorophenol Experimental Dechloration with Thermodynamic Calculations by Municipal Incineration Waste Fly Ash. Kalorimetricky seminar 2003, Sbornik prispevku, p. 185-187, Sucha Rudna v Jesenikach, Czech Republic, 26-30 May 2003.
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