Number of found documents: 256
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Petelýza-chemická recyklace PET
Veselý, Václav; Kouřil, M.
2010 - Czech
Předkládaná zpráva shrnuje výsledky dosažené při plnění projektu Petelýza-chemická recyklace PET. V rámci řešení projektu byly vypracovány a validovány analytické metody související se sledováním technologických kroků. Na základě pilotního provozu byla získána relevantní inženýrská data pro materiálovou a energetickou bilanci a pro návrh aparátů. Tato studie byla podkladem k ekonomickému hodnocení technologického postupu. Report sumarised up the results of project petelyse-chemical recycling of PET boltes. The analytical method was valided for watching of a technologie. The data from pilot plant was ground of design and material and energy balance and development of aparates. This report was base for feasibility study of process chemical PET botles recycling. Keywords: recycling of PET; economic study Available at various institutes of the ASCR
Petelýza-chemická recyklace PET

Předkládaná zpráva shrnuje výsledky dosažené při plnění projektu Petelýza-chemická recyklace PET. V rámci řešení projektu byly vypracovány a validovány analytické metody související se sledováním ...

Veselý, Václav; Kouřil, M.
Ústav chemických procesů, 2010

Výroční zpráva o činnosti a hospodaření ÚCHP AV ČR, v. v. i. za rok 2009
Linek, Jan; Církva, Vladimír
2010 - Czech
Keywords: annual report Fulltext is available at external website.
Výroční zpráva o činnosti a hospodaření ÚCHP AV ČR, v. v. i. za rok 2009

Linek, Jan; Církva, Vladimír
Ústav chemických procesů, 2010

Design of Connectors for the High-Pressure Micromixers Testing at Pilot Plant Scale
Křišťál, Jiří; Pellens, L.
2010 - English
The report describes the desing of standardized connectors for the connection of various micromixers to the high-pressure rig in order to carry out the experiments at the pilot plant flow rates. Keywords: high-pressure connectors; micromixers; experiments Available at various institutes of the ASCR
Design of Connectors for the High-Pressure Micromixers Testing at Pilot Plant Scale

The report describes the desing of standardized connectors for the connection of various micromixers to the high-pressure rig in order to carry out the experiments at the pilot plant flow rates.

Křišťál, Jiří; Pellens, L.
Ústav chemických procesů, 2010

Edge Effects in Voltage-step Transient I. Ohmic Losses in 1D Approximation (revisited)
Wein, Ondřej
2010 - English
Ohmic potential drop between the working and reference electrodes plays an important role in the early stage of the voltage-step transient process. Non-linear effect of the ohmic drop on the transient currents has been calculated for large voltage steps, assuming reversible behavior (negligible surface overpotential) of a redox couple O + ne = R. This report extends an older study by Wein (1991). In particular, it adds a series of analytic approximations and gives more accurate numerical solving. Keywords: voltage-step transient; ohmic loss; cottrell asymptote Available at various institutes of the ASCR
Edge Effects in Voltage-step Transient I. Ohmic Losses in 1D Approximation (revisited)

Ohmic potential drop between the working and reference electrodes plays an important role in the early stage of the voltage-step transient process. Non-linear effect of the ohmic drop on the transient ...

Wein, Ondřej
Ústav chemických procesů, 2010

Project Report Beneficiary No.17 ICPF Reporting Period: Month 01 to 12 (01 June 2009 to 31 May 2010)
Křišťál, Jiří; Stavárek, Petr; Jiřičný, Vladimír
2010 - English
To assess the current state of the art in sulphur dioxide oxidation an extensive literature review including scientific papers, patents and books was started. The literature review is focused on following topics: operation parameters, flow rate, concentration of substrates and impurities, kinetics, catalyst characterization, reaction mechanism and apparatus. Extracted information were evaluated and organized in the form of a data matrix. Keywords: microreactor; SO2 oxidation; process intesification Available at various institutes of the ASCR
Project Report Beneficiary No.17 ICPF Reporting Period: Month 01 to 12 (01 June 2009 to 31 May 2010)

To assess the current state of the art in sulphur dioxide oxidation an extensive literature review including scientific papers, patents and books was started. The literature review is focused on ...

Křišťál, Jiří; Stavárek, Petr; Jiřičný, Vladimír
Ústav chemických procesů, 2010

Final Report on Microprocessing of Fluids 2009 – 2010
Křišťál, Jiří
2010 - English
The final report summarizes the work carried out with the research agreement no. 170306. Keywords: microprocessing; complex fluids; fundamental understanding Available at various institutes of the ASCR
Final Report on Microprocessing of Fluids 2009 – 2010

The final report summarizes the work carried out with the research agreement no. 170306.

Křišťál, Jiří
Ústav chemických procesů, 2010

Voltage-step Transient in Redox Systems III. Effect of the Current Primary Distribution via Nernst Model
Wein, Ondřej
2010 - English
In addition to the common transient diffusion (Cottrell), there are further transport results that cannot be neglected: Faradic resistance at surface of the working electrode, and Ohmic resistance in the bulk of streaming electrolyte solution between the working and counter electrodes. These additional resistances are analyzed here for the voltage-step transient (VST) process using the Nernst model of a two-electrode cell (no reference electrode). The Faradic resistance is considered for a single redox couple O + ne- = R according to Butler-Volmer electrode kinetics. The effect of Ohmic and Faradic resistances in VST is accounted for using two models: the recently updated 1D approximation and a new model that accepts primary current distribution for a circular electrode. It is shown that the 1D approximation introduces unacceptable errors. Keywords: distributed nernst model; ohmic and faradic resistance; primary current distribution Available at various institutes of the ASCR
Voltage-step Transient in Redox Systems III. Effect of the Current Primary Distribution via Nernst Model

In addition to the common transient diffusion (Cottrell), there are further transport results that cannot be neglected: Faradic resistance at surface of the working electrode, and Ohmic resistance in ...

Wein, Ondřej
Ústav chemických procesů, 2010

Motion of a Spherical Bubble in Neighborhood of a Falling Sphere
Vejražka, Jiří
2009 - English
This report focuses on a motion of a small spherical bubble, which rises in a still liquid particle and encounters a falling spherical particle. We consider the case of very small bubbles and of relatively large particle (whose size is much bigger compared to the bubble). The report provides expressions for forces acting on the bubble and equations for the bubble motion. The motion equations form a system of ordinary differential equations, which should be solved numerically. The purpose of this study is to provide a mathematical model, which would describe experimental observations by Hubička et al. (2009). In these experiments, a decrease of collision efficiency of the flotation process is observed if the particle is moving, compared to the case of still particle. Práce se zaměřuje na pohyb malé kulové bubliny, která stoupá v nehybné kapalině a střetává se s padající kulovou částicí. Je uvažován případ malé bubbliny a mnohem větší částice (s průměrem výrazně větším, než je velikost bubliny). Zpráva udává výrazy pro úříslušné síly, které je třeba uvažovat v pohybové rovnici pro bublinu. Výsledkem je pohybová rovnice, kterou je možné řešit numericky. Cílem práce je poskytnout matematický model, který by popsal experimentální pozorování Hubičky a kol. (2009). V těchto experimentech, které sledují kolizní účinnost flotačního procesu, byl pozorován výrazný pokles účinnosti v případě, že se částice pohybovala, ve srovnání s nehybnou částicí. Keywords: bubble motion; spherical particle; force model Available at various institutes of the ASCR
Motion of a Spherical Bubble in Neighborhood of a Falling Sphere

This report focuses on a motion of a small spherical bubble, which rises in a still liquid particle and encounters a falling spherical particle. We consider the case of very small bubbles and of ...

Vejražka, Jiří
Ústav chemických procesů, 2009

Standard Operating Procedure Excel Table for JMP Import
Křišťál, Jiří; Maes, P.
2009 - English
Standard operating procedure was developed to establish the correct procedure for the preparation of MS Excel data table that can be later easily imported to JMP and directly used for evaluation. Keywords: standard operating; excel; jmp import Available at various institutes of the ASCR
Standard Operating Procedure Excel Table for JMP Import

Standard operating procedure was developed to establish the correct procedure for the preparation of MS Excel data table that can be later easily imported to JMP and directly used for evaluation.

Křišťál, Jiří; Maes, P.
Ústav chemických procesů, 2009

Aspekty škodlivých složek bioplynu na vlastnosti ocelových lahví
Kaštánek, František
2009 - Czech
Zpráva obsahuje kritické zhodnocení známých technologických postupů čištění bioplynu po fermentaci, přehled nákladů na samostatné technologie čištění a přehled dodávajících firem. The report contents the evaluation of known technological procedures of the cleaning of biogas from the fermentation process, the summary of costs of cleaning technologies and the survey of supplier companies. Keywords: biogas; cleaning; fermentation process Available at various institutes of the ASCR
Aspekty škodlivých složek bioplynu na vlastnosti ocelových lahví

Zpráva obsahuje kritické zhodnocení známých technologických postupů čištění bioplynu po fermentaci, přehled nákladů na samostatné technologie čištění a přehled dodávajících firem....

Kaštánek, František
Ústav chemických procesů, 2009

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