A5017102075- Spectroscopy and Laser Applications
- Combustion and flame dynamics
- Atmospheric chemistry and aerosols
- Advanced Chemical Sensor Technologies
- Advanced Combustion Engine Technologies
- Atmospheric and Environmental Gas Dynamics
- Advanced Chemical Physics Studies
- Atmospheric Ozone and Climate
- Laser-induced spectroscopy and plasma
- Combustion and Detonation Processes
- Wind and Air Flow Studies
- Fire dynamics and safety research
- Catalytic Processes in Materials Science
- Gas Sensing Nanomaterials and Sensors
- Thermography and Photoacoustic Techniques
- Vehicle emissions and performance
- Laser Material Processing Techniques
- Air Quality Monitoring and Forecasting
- Radiation Detection and Scintillator Technologies
- Laser Design and Applications
- Chemical Thermodynamics and Molecular Structure
- Spectroscopy and Quantum Chemical Studies
- Mass Spectrometry Techniques and Applications
- Atomic and Molecular Physics
- Food Supply Chain Traceability
VSB - Technical University of Ostrava
2014-2024
Czech Academy of Sciences, J. Heyrovský Institute of Physical Chemistry
2009-2024
Czech Academy of Sciences, Institute of Thermomechanics
2008-2016
University of Perugia
2014-2016
Politecnico di Milano
2014-2015
Czech Academy of Sciences
2014
Université de Lille
2009
Centre National de la Recherche Scientifique
2009
Despite extensive kinetics/theoretical studies, information on the detailed mechanism (primary products, branching ratios (BRs)) for many important combustion reactions of O(3P) with unsaturated hydrocarbons is still lacking. We report synergic experimental/theoretical studies + C3H6 (propene) reaction by combining crossed-molecular-beam experiments mass spectrometric detection at 9.3 kcal/mol collision energy (Ec) high-level ab initio electronic structure calculations underlying...
Comprehension of the detailed mechanism O(3P) + unsaturated hydrocarbon reactions is complicated by existence many possible channels and intersystem crossing (ISC) between triplet singlet potential energy surfaces (PESs). We report synergic experimental/theoretical studies propene reaction combining crossed molecular beams experiments using mass spectrometric detection at 9.3 kcal/mol collision (Ec) with high-level ab initio electronic structure calculations PES RRKM/master equation...
ABSTRACT A global uncertainty analysis is performed for three current mechanisms describing the low‐temperature oxidation of dimethyl ether (Aramco Mech 1.3, Metcalfe et al., Int J Chem Kinet 2013, 45, 638–675; Zheng Proc Combust Inst 2005, 30, 1101–1109; Liu Flame 160, 2654–2668) with application to simulations species concentrations (CH 2 O, H O , CH 3 OCHO) corresponding existing data from an atmospheric pressure flow reactor and high‐pressure ignition delays. When incorporating...
We performed synergic experimental/theoretical studies on the mechanism of O((3)P) + propyne reaction by combining crossed molecular beams experiments with mass-spectrometric detection and time-of-flight analysis at 9.2 kcal/mol collision energy (Ec) ab initio electronic structure calculations a high level theory relevant triplet singlet potential surfaces (PESs) statistical branching ratios (BRs) taking into account intersystem crossing (ISC). In this paper (I) we report results...
The Monitoring Nitrous Oxide Sources (MIN2OS) satellite project aims at monitoring global-scale nitrous oxide (N2O) sources by retrieving N2O surface fluxes from the inversion of space-borne measurements that are sensitive to lowermost atmospheric layers under favorable conditions. MIN2OS will provide emission estimates a horizontal resolution 1° × on global scale and 10 km2 regional weekly monthly basis depending application (e.g., agriculture, national inventories, policy, scientific...
Abstract. Laser photoacoustic spectroscopy (PAS) is a method that utilizes the sensing of pressure waves emerge upon absorption radiation by absorbing species. The use conventional electret microphone as sensor has already reached its limit, and new type – an optical been suggested to increase sensitivity this method. movement micro-lever or membrane sensed via reflected beam light, which falls onto position-sensing detector. one in form silicon cantilever enhanced laser PAS. Herein, we test...
This study examines the varying performance of low-cost sensors during seasonal smog events, particularly those resulting from solid fuel combustion linked to residential or industrial heating and other pollution sources. A prototype sensor node developed within this work was collocated for several months with reference equipment at an air quality monitoring station in city Ostrava (Moravian-Silesian region, Czech Republic). Deterioration a pair alert namely wintertime "Polish...
Abstract The electron temperatures T e were measured using a double probe in premixed methane flame produced by calibration burner according to Hartung et al. experiment was performed at atmospheric pressure. In contrast other authors, we have managed find typical nonlinearities corresponding the retarding current region and calculate suitable fit on basis of characteristics. A Pt‐Rh thermocouple used measure h “heavy” species. Our results indicate that plasma can be considered weakly...
The applicability of cantilever-enhanced photoacoustic spectroscopy (CEPAS), which exploits the unique properties a micromechanical lever sensor (cantilever) in combination with tunable quantum cascade lasers (QCLs), is evaluated for monitoring several species produced by biomass burning. detection limits selected molecules (HCOOH, CH3CN, CH3OH, CH3COCH3, CO2, and N2O) commercial CEPAS unit (GASERA) used together QCLs were estimated under laboratory conditions. normalized noise equivalent...
Numerical simulation of dilution effect on combustion and flame properties is desirable for various industrial or scientific applications. Predicative capabilities the simplified (one- two-step) chemical kinetic mechanisms methane oxidation in highly diluted flames were evaluated basis mathematical modelling one-dimensional (axisymmetric) configuration. Profiles temperatures concentrations reactants, products intermediates premixed flat nonpremixed counterflow burning air/diluent mixture...
The distribution of pollutants in two urban scale models (point emission source and street canyon with extensive transport) was investigated by means CO 2 laser photoacoustic spectroscopy the region atmospheric window (9–10 μm). experimental results physical modeling are a good agreement numerical calculations performed frame computational fluid dynamic (CFD) modeling. Methanol, ethanol, ozone (examples light pollutants), as well sulfur hexafluoride 1,2 dichlorethane heavy were selected on...
Abstract The infrared spectrum of the fluorocarboxyl radical, FCO2, was recorded at high resolution (0.0035 cm−1) in 600–1400 cm−1 region on a Bruker IFS 120 HR Fourier transform spectrometer University Wuppertal. analysis A-type ν2 band FCO2 (CF stretching mode) centred 970.208 performed making use ground state parameters achieved by [L. Kolesniková, J. Varga, H. Beckers, M. Šimečková, Z. Zelinger, L. Nová Stříteská, P. Kania, Willner, and Š. Urban, Chem. Phys. 128, 224302/1 (2008)]. For...
Abstract The availability of reliable modeling tools and input data required for the prediction surface removal rate from lithium fluoride targets irradiated by intense photon beams is essential many practical aspects. This study motivated implementation soft X-ray (SXR) or extreme ultraviolet (XUV) lasers pulsed ablation thin film deposition. Specifically, it focused on quantitative description XUV laser-induced desorption/ablation fluoride, which a reference large band-gap dielectric...