Final Report on Microprocessing of Fluids 2010 – 2011
Křišťál, Jiří
2011 - English The report summarizes the work carried out within the reseach agreement no. 170306 in 2010/2011. Keywords: microprocessing of fluids; fundamental understanding Available at various institutes of the ASCR Final Report on Microprocessing of Fluids 2010 – 2011

The report summarizes the work carried out within the reseach agreement no. 170306 in 2010/2011.

Křišťál, Jiří
Ústav chemických procesů, 2011

Diurnal Trends of Carbonaceous Aerosols at Prague Suburban Station during Different Seasons
Vodička, Petr; Schwarz, Jaroslav
2011 - English This work offers insight into diurnal oscillations of EC and OC at Prague suburban site (Central Europe) during different seasons. The observed seasonal trends were compared with correlations for gaseous pollutants and meteorological variables and used to characterize the origin of these aerosols. Keywords: carbonaceous aerosol; organic carbon; elemental carbon Available at various institutes of the ASCR Diurnal Trends of Carbonaceous Aerosols at Prague Suburban Station during Different Seasons

This work offers insight into diurnal oscillations of EC and OC at Prague suburban site (Central Europe) during different seasons. The observed seasonal trends were compared with correlations for ...

Vodička, Petr; Schwarz, Jaroslav
Ústav chemických procesů, 2011

Long Time Measurement of Aerosol Hydroscopicity at Košetice Backround Station
Ondráček, Jakub; Vodička, Petr
2011 - English This work describes the design of the LACP HTDMA and some of the results obtained during long time measurement at Košetice background station (Czech Republic), where it was deployed within the frame of two EU projects (EUSAAR and EUCAARI). The measurement campaign lasted from May 2008 until September 2009 with smaller or larger gaps in the data coverage. Keywords: atmospheric aerosol; growth factor; backround station Available at various institutes of the ASCR Long Time Measurement of Aerosol Hydroscopicity at Košetice Backround Station

This work describes the design of the LACP HTDMA and some of the results obtained during long time measurement at Košetice background station (Czech Republic), where it was deployed within the frame ...

Ondráček, Jakub; Vodička, Petr
Ústav chemických procesů, 2011

Deposition of Aerosol Particles on Filter Surfaces
Smolík, Jiří; Mašková, Ludmila; Zíková, Naděžda; Ondráček, Jakub
2011 - English The simple model showed that the particle penetration and deposition depend on particle size and width of the gap, with the depth of the penetration limited by parallel diffusional deposition on filter surfaces. Smaller particles penetrate faster and deeper resulting in higher particle number concentration of deposited particles but higher mass is transported by larger particles. The results of modelling have been qualitatively confirmed by Ion Chromatography using sulphate as marker for deposited particles. Keywords: aerosol particles; deposition; filter surface Available at various institutes of the ASCR Deposition of Aerosol Particles on Filter Surfaces

The simple model showed that the particle penetration and deposition depend on particle size and width of the gap, with the depth of the penetration limited by parallel diffusional deposition on ...

Smolík, Jiří; Mašková, Ludmila; Zíková, Naděžda; Ondráček, Jakub
Ústav chemických procesů, 2011

Scaling Laws for Polymers in Dissipative Particle Dynamics Revised
Posel, Z.; Lísal, Martin
2011 - English We present here a systematic study of dynamic behavior for polymer (PE) melt by means of Dissipative Particle Dynamics (DPD). We used DPD spring potential between adjacent segments. By changing various parameters related to spring potential like stiffness k, equilibrium distance r0 and parameters related to dynamic behavior like friction coefficient γ presented in dissipation force we tested their influence on scaling laws. We also compared these scaling laws obtained from our simulations with predictions from Rouse theory. Keywords: Rouse theory; dynamic behavior for PE; spring potential Available at various institutes of the ASCR Scaling Laws for Polymers in Dissipative Particle Dynamics Revised

We present here a systematic study of dynamic behavior for polymer (PE) melt by means of Dissipative Particle Dynamics (DPD). We used DPD spring potential between adjacent segments. By changing ...

Posel, Z.; Lísal, Martin
Ústav chemických procesů, 2011

Empirical and Not-so-Empirical Correlations Holding for 2J(29Si-O-29Si) Couplings in Industrially Important Siloxanes
Schraml, Jan; Kurfürst, Milan; Blechta, Vratislav
2011 - English Keywords: empirical correlation; siloxanes; substituent Available at various institutes of the ASCR Empirical and Not-so-Empirical Correlations Holding for 2J(29Si-O-29Si) Couplings in Industrially Important Siloxanes

Schraml, Jan; Kurfürst, Milan; Blechta, Vratislav
Ústav chemických procesů, 2011

The Transitional Regime of Backward-Facing Step Flows
Tihon, Jaroslav; Pěnkavová, Věra; Havlica, Jaromír; Šimčík, Miroslav
2011 - English The backward-facing step flow is investigated experimentally (electrodiffusion technique) and numerically (CFD software Fluent) at moderate Reynolds numbers achieved in a water channel. The direction sensitive sensors are used to measure the wall shear rate behind the step and detect the near-wall extent of different flow-recirculation regions. 2D numerical simulations provide additional information on the global flow rearrangement caused by the change of operational parameters (channel expansion ratios, inlet flow conditions). At the transitional flow regime, the near-wall flow exhibits an unsteady character with a high sensitivity to external low-frequency perturbations (intrinsic flow instability). The inlet pulsatile forcing is found to affect strongly the overall flow structure behind the step, resulting in the reattachment length reduction and the reverse flow intensification. Keywords: bakward-facing step; flow instability; wall shear stress Available at various institutes of the ASCR The Transitional Regime of Backward-Facing Step Flows

The backward-facing step flow is investigated experimentally (electrodiffusion technique) and numerically (CFD software Fluent) at moderate Reynolds numbers achieved in a water channel. The direction ...

Tihon, Jaroslav; Pěnkavová, Věra; Havlica, Jaromír; Šimčík, Miroslav
Ústav chemických procesů, 2011

Project Report Beneficiary No.17 ICPF Reporting period: Months 13 to 24 (01 June 2010 to 31 May 2011)
Křišťál, Jiří; Stavárek, Petr; Jiřičný, Vladimír
2011 - English To assess the commercially available SO2 oxidation catalyst and select several for further testing we performed the extensive literature review. Based on that, we tested the selected catalysts for SO2 oxidation in experiments with the KIT lab microreactor, and started the detailed catalyst comparison based on the evaluation of the pre-exponential factor (A0) and activation energy (EA) calculated from the kinetic model by fitting the experimental data. To verify the possible design of a new sulph(on)ation reactor we performed the initial hydrodynamic experiments with gas-liquid two-phase flow in small channels. Keywords: microreactor; SO2 oxidation; process intesification Available at various institutes of the ASCR Project Report Beneficiary No.17 ICPF Reporting period: Months 13 to 24 (01 June 2010 to 31 May 2011)

To assess the commercially available SO2 oxidation catalyst and select several for further testing we performed the extensive literature review. Based on that, we tested the selected catalysts for SO2 ...

Křišťál, Jiří; Stavárek, Petr; Jiřičný, Vladimír
Ústav chemických procesů, 2011

SOP - FMU LabVision Auto Export
Křišťál, Jiří
2011 - English FMU LabVision Auto Export is an extension of FMU control system providing the means for the automated export of process data and calculation of its mean and standard deviation values. Keywords: FMU control system; export of process data; calculation Available at various institutes of the ASCR SOP - FMU LabVision Auto Export

FMU LabVision Auto Export is an extension of FMU control system providing the means for the automated export of process data and calculation of its mean and standard deviation values.

Křišťál, Jiří
Ústav chemických procesů, 2011

Generation of Binary COOx/SiO2 Nanoparticles from Organocompound Precursors
Moravec, Pavel; Smolík, Jiří; Bakardjieva, Snejana; Levdansky, V.V.
2011 - English In recent years cobalt and cobalt oxide nanoparticles have attracted substantial research effort because of their potential applications such as protective materials, catalysts, magnetic data recorders, batteries and gas sensors (Jang et al., 2004). To improve their functionality and biocompatibility nanoparticles are frequently coated with SiO2 (Teleki et al., 2008). In this work, we studied CoOx-SiO2 binary nanoparticles synthesis by metal organics chemical vapor deposition (MOCVD) using organo-compound precursors cobalt acetylacetonate (CoAA) and tetraethyl orthosilicate (TEOS). Keywords: binary nanoparticles; metal organics CVD; nanoparticle generation Available at various institutes of the ASCR Generation of Binary COOx/SiO2 Nanoparticles from Organocompound Precursors

In recent years cobalt and cobalt oxide nanoparticles have attracted substantial research effort because of their potential applications such as protective materials, catalysts, magnetic data ...

Moravec, Pavel; Smolík, Jiří; Bakardjieva, Snejana; Levdansky, V.V.
Ústav chemických procesů, 2011