The Intensification of Leaching Process of Electronic Wastes by Microwave Radiation
Znamenáčková, I.; Lovás, M.; Hredzák, S.; Hájek, Milan; Sobek, Jiří
2010 - English Leaching of electronic scrabs in HCl and H2SO4 by microwaves was more efficient compared to conventional method. Keywords: electronic scrap; leaching; microwave Available at various institutes of the ASCR The Intensification of Leaching Process of Electronic Wastes by Microwave Radiation

Leaching of electronic scrabs in HCl and H2SO4 by microwaves was more efficient compared to conventional method.

Znamenáčková, I.; Lovás, M.; Hredzák, S.; Hájek, Milan; Sobek, Jiří
Ústav chemických procesů, 2010

CFD Simulation of Hydrogen Production by Biomass Partial Oxidation
Tukač, V.; Hanika, Jiří; Veselý, Václav; Lederer, J.; Kovač, D.; Nečesaný, F.
2010 - English Nowadays hydrogen demand caused by deep fuel refining and the other sustainable processes leads to utilization of new raw materials. Simultaneously, extensive biodiesel production creates great amount of biomass wastes transcendent over feeding potential of farm animals. One of potentially useful process of hydrogen production from renewable natural sources seems to be partial oxidation (POX) and gasification of biomass material like rape meal from rape oil production and/or distillery slop originated from bioethanol. The goal of this work was to develop simulation models of pilot POX reactor working with mixture of fuel oil and biomass. Keywords: new raw materials; fuel oil; biomass Available at various institutes of the ASCR CFD Simulation of Hydrogen Production by Biomass Partial Oxidation

Nowadays hydrogen demand caused by deep fuel refining and the other sustainable processes leads to utilization of new raw materials. Simultaneously, extensive biodiesel production creates great amount ...

Tukač, V.; Hanika, Jiří; Veselý, Václav; Lederer, J.; Kovač, D.; Nečesaný, F.
Ústav chemických procesů, 2010

Solubility of Ionic Liquids in Binary Systems with Water and Pseudobinary Systems with Solution Methanol/Water (1:1 Proportion of Weight)
Machanová, Karolina; Bendová, Magdalena; Sedláková, Zuzana; Wagner, Zdeněk; Aim, Karel
2010 - English In this work, a study of solubilities of the above-mentioned ionic liquids in binary systems with water and pseudo-binary systems with solution methanol/water (1:1 proportion of weight) is presented. Knowledge of solubility of ionic liquids in these particular systems is helpful in the design and optimization of homogeneous catalytic processes, such as biphasic and reversibly biphasic catalysis. The solubilities were investigated by two experimental methods – the cloud-point and volumetric method. Keywords: ionic liquids; homogeneous catalytic processes; methanol/water Available at various institutes of the ASCR Solubility of Ionic Liquids in Binary Systems with Water and Pseudobinary Systems with Solution Methanol/Water (1:1 Proportion of Weight)

In this work, a study of solubilities of the above-mentioned ionic liquids in binary systems with water and pseudo-binary systems with solution methanol/water (1:1 proportion of weight) is presented. ...

Machanová, Karolina; Bendová, Magdalena; Sedláková, Zuzana; Wagner, Zdeněk; Aim, Karel
Ústav chemických procesů, 2010

Colloidal Silica as an Efficient Binder for the Preparation of Al-SBA-15 Pellets
Topka, Pavel; Karban, Jindřich; Soukup, Karel; Jirátová, Květa; Šolcová, Olga
2010 - English The objective of this contribution was to examine the possibility of using colloidal silica as a binder for the preparation of extrudates or pellets from mesoporous molecular sieves. Al- SBA-15 pellets with different content of colloidal silica were prepared and their textural properties and mechanical stability were investigated. The catalytic activity of the pellets in Friedel-Crafts alkylation of toluene with benzyl alcohol was directly compared to that of binder-free pellets and powder catalyst. Keywords: catalysts; colloidal silica; pellets Available at various institutes of the ASCR Colloidal Silica as an Efficient Binder for the Preparation of Al-SBA-15 Pellets

The objective of this contribution was to examine the possibility of using colloidal silica as a binder for the preparation of extrudates or pellets from mesoporous molecular sieves. Al- SBA-15 ...

Topka, Pavel; Karban, Jindřich; Soukup, Karel; Jirátová, Květa; Šolcová, Olga
Ústav chemických procesů, 2010

Behavior of Rising Bubbles - Effect of Liquid Properties
Wichterle, K.; Smutná, K.; Večeř, M.; Růžička, Marek
2010 - English Air bubbles with volumes 10 mm3 < V < 1000 mm3 were studied in liquids with different density ρ, viscosity μ, and surface tension σ: i. e. water, glycerol solutions, calcium chloride solution, PAA solution, and butyl alcohol. In countercurrent downward flow of the liquids, the bubble shape, position, and motion can investigated experimentally for a quite long time interval. Keywords: air bubbles; behaviour of rising bubbles; experiments Available at various institutes of the ASCR Behavior of Rising Bubbles - Effect of Liquid Properties

Air bubbles with volumes 10 mm3 ...

Wichterle, K.; Smutná, K.; Večeř, M.; Růžička, Marek
Ústav chemických procesů, 2010

Influence of Interphase Meniscus on Bubble Formation at a Plate
Stanovský, Petr; Růžička, Marek
2010 - English This work is focused on a single bubbling from orifice at the plate as the first step for modelling of multi-orifice bubble formation at perforated plate. We explored experimentally an influence of design parameters (orifice diameter, plate thickness, liquid viscosity, gas chamber volume) on the interphase meniscus behaviour. The influence of an external acoustic field on the meniscus and bubble formation was explored also to simulate an influence of the sound field produced by other bubbles in real process. Acquired characteristics of the meniscus were incorporated into the model of bubble formation process. Keywords: plate; bubble formation; meniscus Available at various institutes of the ASCR Influence of Interphase Meniscus on Bubble Formation at a Plate

This work is focused on a single bubbling from orifice at the plate as the first step for modelling of multi-orifice bubble formation at perforated plate. We explored experimentally an influence of ...

Stanovský, Petr; Růžička, Marek
Ústav chemických procesů, 2010

Theoretical Description of Motion of a Spherical Bubble in Neighbourhood of a Falling Particle
Basařová, P.; Vejražka, Jiří; Zedníková, Mária; Hubička, M.
2010 - English The aim of this work is to broaden the knowledge of the hydrodynamic interactions that occur between bubbles and solids of a comparable size. Focusing on collision processes between a single rising bubble with mobile surface and a larger falling solid spherical particle in stagnant liquid, the theoretical model describing the bubble trajectory is given here. The model is based on forces acting on the bubble and utilizes also equation for the bubble motion. The bubble is considered to be spherical and its motion is straight and rectilinear. The particle is spherical and moves vertically down with a steady velocity; the flow around the particle is axially symmetric. Keywords: bubble-particle interaction; bubble hydrodynamics Available at various institutes of the ASCR Theoretical Description of Motion of a Spherical Bubble in Neighbourhood of a Falling Particle

The aim of this work is to broaden the knowledge of the hydrodynamic interactions that occur between bubbles and solids of a comparable size. Focusing on collision processes between a single rising ...

Basařová, P.; Vejražka, Jiří; Zedníková, Mária; Hubička, M.
Ústav chemických procesů, 2010

Wall Shear Rate Components for Wavy Taylor-Couette Flow
Kristiawan, M.; Jirout, T.; El Faye, A.; Sobolík, Václav
2010 - English Experiments were carried out in the wavy flow between concentric cylinders with the inner cylinder rotating and outer cylinder fixed. The radius and aspect ratios were 0.8 and 44, respectively. The electrodiffusion method with a three-segment and simple micro-electrodes was used for study of the axial and azimuthal components of shear rate at the outer cylinder. The axial distributions of these components were obtained by sweeping the vortices along the probes using a slow axial flow. The wavelength and phase celerity of waves, height of vortices and their drifting velocity were calculated from the measured limiting diffusion currents. Keywords: wavy vortices; electrodiffusion method; three-segment probes Available at various institutes of the ASCR Wall Shear Rate Components for Wavy Taylor-Couette Flow

Experiments were carried out in the wavy flow between concentric cylinders with the inner cylinder rotating and outer cylinder fixed. The radius and aspect ratios were 0.8 and 44, respectively. The ...

Kristiawan, M.; Jirout, T.; El Faye, A.; Sobolík, Václav
Ústav chemických procesů, 2010

1H Detected SQSQ Experiment
Blechta, Vratislav; Schraml, Jan
2010 - English Keywords: sqsq experiment; carbon detection Available at various institutes of the ASCR 1H Detected SQSQ Experiment

Blechta, Vratislav; Schraml, Jan
Ústav chemických procesů, 2010

Ability of Photocatalytic TiO2 Surfaces to Destroy MRSA ST398 under Controlled UV Light Conditions
Krýsa, J.; Zita, J.; Zlámal, M.; Klusoň, Petr; Giotis, E.S.; Loeffler, A.; Stärk, K.D.C.; Lloyd, D.A.
2010 - English Keywords: MRSA ST398; TiO2; desinfection Available at various institutes of the ASCR Ability of Photocatalytic TiO2 Surfaces to Destroy MRSA ST398 under Controlled UV Light Conditions

Krýsa, J.; Zita, J.; Zlámal, M.; Klusoň, Petr; Giotis, E.S.; Loeffler, A.; Stärk, K.D.C.; Lloyd, D.A.
Ústav chemických procesů, 2010