A5026884101- Advanced Combustion Engine Technologies
- Combustion and flame dynamics
- Atmospheric chemistry and aerosols
- Combustion and Detonation Processes
- Chemical Thermodynamics and Molecular Structure
- Catalytic Processes in Materials Science
- Heat transfer and supercritical fluids
- Gene Regulatory Network Analysis
- Catalysis and Oxidation Reactions
- Thermal and Kinetic Analysis
- Advanced Chemical Physics Studies
- Atmospheric and Environmental Gas Dynamics
- Probabilistic and Robust Engineering Design
- Spectroscopy and Quantum Chemical Studies
- Thermochemical Biomass Conversion Processes
- Atmospheric Ozone and Climate
- Plasma Applications and Diagnostics
- Microbial Metabolic Engineering and Bioproduction
- Free Radicals and Antioxidants
- thermodynamics and calorimetric analyses
- Nonlinear Dynamics and Pattern Formation
- Protein Structure and Dynamics
- Advanced Control Systems Optimization
- Air Quality and Health Impacts
- Industrial Gas Emission Control
Eötvös Loránd University
2015-2024
Sandia National Laboratories California
2008
University of Nottingham
2008
University of Leeds
1992-2002
Institute of Materials and Environmental Chemistry
2001
Institute for Technical Physics and Materials Science
1991-1994
Hungarian Academy of Sciences
1988-1993
Semmelweis University
1982
Abstract An eigenvalue–eigenvector analysis is used to extract meaningful kinetic information from linear sensitivity coefficients computed for several species of a reacting system at time points. The main advantage this method lies in its ability reveal those parts the mechanism which consist strongly interacting reactions, and indicate their importance within mechanism. Results can be solve three general problems. Firstly, an objective condition constructing minimal reaction set presented....
A possible solution to improve the combustion properties of ammonia is blend it with other fuels. Two most usually used co-fuels are hydrogen and syngas (H2/CO). To investigate chemistry co-combustion these fuels, a large amount indirect experimental data for neat NH3, NH3/H2 NH3/syngas fuel mixtures were collected from literature including ignition delay times measured in shock tubes, concentration measurements jet stirred flow reactors, laminar burning velocity measurements. Altogether,...
Abstract A comprehensive chemical mechanism to describe the oxidation of methane has been developed, consisting 351 irreversible reactions 37 species. The also accounts for kinetics hydrogen, carbon monoxide, ethane, and ethene in flames homogeneous ignition systems a wide concentration range. It tested against variety experimental measurements laminar flame velocities, species profiles, delay times. highest sensitivity are discussed detail compared with same GRI, Chevalier, Konnov...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMechanistic details of the oscillatory Belousov-Zhabotinskii reactionLaszlo. Gyorgyi, Tamas. Turanyi, and Richard J. FieldCite this: Phys. Chem. 1990, 94, 18, 7162–7170Publication Date (Print):September 1, 1990Publication History Published online1 May 2002Published inissue 1 September 1990https://doi.org/10.1021/j100381a039RIGHTS & PERMISSIONSArticle Views989Altmetric-Citations161LEARN ABOUT THESE METRICSArticle Views are COUNTER-compliant sum full...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOn the error of quasi-steady-state approximationT. Turanyi, A. S. Tomlin, and M. J. PillingCite this: Phys. Chem. 1993, 97, 1, 163–172Publication Date (Print):January 1993Publication History Published online1 May 2002Published inissue 1 January 1993https://doi.org/10.1021/j100103a028RIGHTS & PERMISSIONSArticle Views1101Altmetric-Citations137LEARN ABOUT THESE METRICSArticle Views are COUNTER-compliant sum full text article downloads since November...
A comprehensive and hierarchical optimization of a joint hydrogen syngas combustion mechanism has been carried out. The Kéromnès et al. (Combust Flame, 2013, 160, 995–1011) for was updated with our recently optimized (Varga al., Proc Combust Inst, 2015, 35, 589–596) using set direct indirect experimental data relevant to combustion. collection consisted ignition measurements in shock tubes rapid compression machines, burning velocity measurements, species profiles measured tubes, flow...
Abstract The determination of rate parameters gas‐phase elementary reactions is usually based on direct measurements. obtained in many independent measurements are then used reaction mechanisms, which tested against the results indirect experiments, like time‐to‐ignition or laminar flame velocity We suggest a new approach that takes into account both and optimizes all influential parameters. First, domain feasibility Arrhenius determined from available Thereafter, optimal sought within this...
A detailed reaction mechanism for ethanol combustion was developed describing ignition, flame propagation, and species concentration profiles with high accuracy. Starting from a modified version of the Saxena Williams (Proc. Combust. Inst. 2007, 31, 1149–1156) adopting H2/CO base chemistry joint optimized hydrogen syngas Varga et al. (Int. J. Chem. Kinet. 2016, 48, 407–422), an optimization 54 Arrhenius parameters 16 important elementary C1/C2 reactions performed using several thousand...
Abstract Using the elementary sensitivity densities, a reaction rate gradient is obtained which derivative of species concentration change with respect to coefficient. The dimensionless (log‐normalized) form ratio i due j and net . This result provides mathematical basis for use various forms analyses in study complex mechanisms. kinetic information inherent relative matrix extracted by principal component analysis. method used analyze mechanism high‐temperature formaldehyde oxidation...
Abstract Chemical kinetics databases for many elementary gas‐phase reactions provide the recommended values of Arrhenius parameters, temperature range their validity, and dependence uncertainty rate coefficient k . An analytical expression is derived that describes as a function elements covariance matrix parameters. Based on this expression, various descriptions used in combustion, IUPAC JPL atmospheric chemical are analyzed detail. Recommendations given an improved representation...
Large amount of experimental data for laminar burning velocity (LBV) measurements methane (+ H2/CO) − oxygen diluent mixtures (5500 points in 646 datasets) covering wide ranges equivalence ratio, cold side temperature and pressure were collected from 111 publications. The diluents included N2, H2O, CO2, Ar He. files are available on the ReSpecTh site (http://respecth.hu). Performances 12 combustion mechanisms reproducing these LBV analyzed according to experiment types conditions. Most could...
A state-of-the-art chemical mechanism is introduced to properly describe processes inside a harmonically excited spherical bubble placed in water and saturated with oxygen. The model uses up-to-date Arrhenius-constants, collision efficiency factors takes into account the pressure-dependency of reactions. Duplicated reactions are also applied, backward rates calculated via suitable thermodynamic equilibrium conditions. Our proposed reaction compared three other models that widely applied...