Valentin Munteanu

Universitatea din Bucuresti, Bucuresti, .

E-mail: trimite un mesaj.

Pagina web a instituţiei: http://www.unibuc.ro
Pagina web personala: http://gw-chimie.math.unibuc.ro/staff/vali/index.html

Nascut(a) in: 1971

Interese: chimie fizica, combustii explozive in amestecuri gazoase, oxidare in apa supercritica

Details:
In order to perform the experimental section of my Ph.D. Thesis I was asked to design & set up a gas flow equipment able to maintain a pressurized gas content or a preliminary vacuum for at least 300 seconds, with a pressure sensitivity of +/- 0.1 kPa. I also had to gather background knowledge concerning operation with flammable gases, high voltage circuits, and data acquisition systems. The main objectives of the original contribution of my PhD research were: evaluation of minimum ignition energy of explosive hydrocarbon-air mixtures (propane, propylene, commercial cocking machine Shell Gas) via quenching distance direct measurement, using a correlation model; single step reaction kinetics - evaluation of global reaction order and global activation energy from the pressure and temperature dependence of the quenching distance and burning velocity; inhibition effect of carbon dioxide on the flammability of propane-air mixture, application of regression analysis on the experimental data. The issues I have been confronted with concerned equipment component's provider (mainly Cole-Parmer), equipment assembling and testing, equipment interaction with control systems - feedback diagram). I also had to carry out experiment optimum scheduling in order to avoid unwanted dynamic phenomena - turbulences, gradients in fuel concentration, fuel de-mixing.

The first employer - Research Center for Macromolecular Materials and Membranes, Bucharest - hungry for young and enthusiastic researchers, hired me two weeks after graduation. I was included in the group of membrane characterization laboratory and soon after I began to pay my scientific contribution to the research contracts awarded by the former Romanian Ministry of Research and Development. On that occasion I had accumulated background knowledge related to membrane (preparation and characterization) and membrane's processes (micro , ultra- and nanofiltration).
At the National Institute for Scientific Research in Electrostatics and Electrotechnologies - Bucharest, I had to deal with topics ranging from macromolecular science to environment protection:
o inorganic and organic additives acting as flame-retardants in LDPE insulating materials for electrotechnical use;
o manufacture of insulating KITs for average to high voltage applications; designed for electric network maintenance (includes fireproof LDPE heat shrinkable tubes);
o electron beam processing of macromolecular materials and plastics;
o radiation-induced polymerization; functional grafting;
o electron beam removal of toxic emission from power plant stacks: DeNOx, DeSOx;
o ozone generators - optimization of NOx emissions at high voltage;
o ozone-UV hybrid system for drinkable water treatment;
o microwaves-induced polymerization; application of polyelectrolytes to waste water treatment; application of macromolecular absorbents to oil extraction.

Other activities

- member of the organizing team of the NATO WORKSHOP The Modern Problems of Electrostatics with Application in Environment Protection, 1998, Bucharest, ROMANIA
- makeup editor of NATO Science Series: The Modern Problems of Electrostatics with Application in Environment Protection, I.I. Inculet, F.T. Teodorescu and R. Cramariuc Eds., section 2: Environmental Security, vol 63, Kluwer Academic Publisher, 1999 (english).
- makeup editor for Electrotechnologies, M. Bologa, F.T. Teodorescu and R. Cramariuc Eds., vol. I: Electrostatics, the Romanian Academy, 2000 (romanian).
makeup editor for the series of Analele Universitatii Bucuresti - Chimie (english or french) http://gw-chimie.math.unibuc.ro/anunivch/analele_univ_chimie.html

Publicații selectate:

* R. Cramariuc, F. T. Tanasescu, I. Velisar, V. Milevschi, V. Munteanu and V. Ghiuta, New Considerations of Ozone Generation and the Influence of NOx in Ozone Production and Water Treatment, Kluwer Academic Publisher, Inculet, Ion I.; Tanasescu, Florin Teodor; Cramariuc, Radu, NATO Science Series, Section 2: Environmental Security, 63, 1999.

* R. Cramariuc, G. Marin, I. Teodorescu, V. Munteanu, V. Ghiuta, D. Martin and M. T. Radoiu, Experimental Contributions For SO2 and NOx Reduction from Combustion Flue Gases by Energetic Electron Induced Plasma Process, Corona Discharge and Microwaves, Kluwer Academic Publisher, Inculet, Ion I.; Tanasescu, Florin Teodor; Cramariuc, Radu, NATO Science Series, Section 2: Environmental Security, 63, 1999.

* V. Munteanu, A. Gutkowski, D. Razus, D. Oancea, J. Jarosinski, Comparison between two methods for direct measurement of quenching distance of ethylene/air mixtures, Proceedings of the 19th International Symposium on Combustion Processes, 2005.

* D. Oancea, D. Razus, V. Munteanu, Empirical and Theoretical Correlations between Minimum Ignition Energy and Quenching Distance, Proceedings of the 17th International Symposium on Combustion Processes, 2001.

* V. Munteanu, N.G. Musat, D. Razus, D. Oancea, Ignition of Liquefied Petroleum Gas/Air Mixtures by Electric Sparks, Revista de Chimie, 56(9), 2005.

* G. Anitescu, V. Munteanu, L.L. Tavlarides, Co-Oxidation Effects of Methanol and Benzene on the Decomposition of 4-Chlorobiphenyl in Supercritical Water, The Journal of Supercritical Fluids, 33(2), 2005.

* G. Anitescu, V. Munteanu, L.L. Tavlarides, Decomposition of Monochlorobiphenyl Isomers in Supercritical Water in the Presence of Methanol with and without Oxygen: A Global Kinetic Study, AIChE Journal, 50(7), 2004.

* D. Oancea, D. Razus, V. Munteanu, I. Cojocea, High voltage and break spark ignition of propylene/air mixtures at various initial pressures, Journal of Loss Prevention in the Process Industries, 16(5), 2003.

* R. Cramariuc, G. Marin, D. Martin, B. Cramariuc, I. Teodorescu, V. Munteanu and V. Ghiuta, Contribution to Electrical Discharge Electron Beam System for Flue Gas Cleaning Method, Radiation Physics and Chemistry, 57(3-6), 2000.

* D. Dimonie, M. Dimonie, V. Munteanu, H. Iovu, J. Couve and M.J. Abadie, Nature of the first exothermic peak on the DSC curve of linear polydicyclopentadiene obtained with a special catalytic system, Polymer Degradation and Stability, 70(3), 2000.

* D. Dimonie, M. Dimonie, S. Stoica, V. Munteanu and M.J. Abadie, Some Aspects of the Thermal Stability of Linear Polydicyclopentadiene(L-PDCPD), Polymer Degradation and Stability, 67(1), 2000.