National Repository of Grey Literature 36 records found  beginprevious21 - 30next  jump to record: Search took 0.02 seconds. 
Vizualizace dvoufázového toku ve štěrbinovém mikro reaktoru
Křišťál, Jiří ; Havlica, Jaromír ; Jiřičný, Vladimír
An experimental study has been carried out concentrated on visualization of the two-phase flow in a thin-gap micro reactor. The experiments concentrated on evaluation of the rate of formation, size and rate of coalescence of gas bubbles under various conditions of flow and electric current load.
Kapalinová extrakce tálového mýdla hexanem
Heyberger, Aleš ; Rousková, Milena ; Tříska, Jan ; Volaufová, Eva ; Krtička, M.
Liquid-liquid extraction of tall soap by hexane was studied. Different ratios of tall soap and hexane/alcohol and different sources of tall soap were investigated with the aim to obtain the maximum yield of beta-sitosterol.
Zpracování snímků výbrusů za účelem 3d rekonstrukce pórovitých materiálů
Hejtmánek, Vladimír ; Čapek, P. ; Brabec, Libor ; Zikánová, Arlette ; Kočiřík, Milan
The technique of electron microscopy in SEM/BSE work modes was compared for the purpose of porosity estimation of some porous materials such as potential membrane supports on the basis of a-alumina. To prepare casts, an individual samples were impregnated by epoxide resin AralditO under high vacuum. Every cast was cut, grinded and polished to achieve its smooth face for observation by means of electron microscopy.
Příprava katalyzátorů MoO3/Al2O3 s ditribucí vajčná skořápka rozprostíráním MoO3 s asistencí rozpouštědla na extrudátech Al2O3: vliv velikosti částic MoO3 a teploty na rychlost rozprostírání
Kaluža, Luděk ; Gulková, Daniela ; Zdražil, Miroslav
MoO3/Al2O3 catalysts with sharp and deep eggshell radial profiles of MoO3 concentration were prepared by the reaction of Al2O3 extrudates with MoO3/Al2O3 slurry. The method can be named as solvent assisted spreading. The profiles were visualized by two methods: electron probe microanalysis and sulfidation of samples.
Promotování MoO3/Al2O3 hydrodesulfurizačních katalyzátorů Co naneseným suspenzní impregnací
Kaluža, Luděk ; Zdražil, Miroslav
A new method of CoO deposition, solvent assisted spreading, has been studied. Co3O4, Co(OH)2, CoCO3Co(OH)2, and CoCO3 were allowed to react with MoO3/Al2O3 catalysts containing saturated MoO3 monolayer in water slurries. CoO deposition was followed by EPMA. The materials selected were characterized by PZC, SBET, XRD, AAS and HDS of thiophene.
Experimentální stanovení a korelace fázových rovnovah pro systémy oxidu uhličitého s alkanoly v kritické oblasti
Babič, Alexandr ; Aim, Karel
This article deals with experimental determination and correlation of VLE for CO2 + Alkanol systems at superambient conditions.
Extrakce éterického oleje pomocí procesu okamžitého odpaření: aplikace na indonézské květy Ylang-Ylang
Kristiawan, M. ; Sobolík, Václav ; Allaf, K.
The extraction of Indonesian ylang-ylang oil was carried out by new process: Instantaneous Controlled Pressure Drop (DIC). This process involves subjecting the dried ylang-ylang (Cananga odorata Hook. fil. et Thomson, forma macrophylla) flowers for a short period time to a saturated steam pressure, followed by an abrupt pressure drop into vacuum (about 50 mbar).
Mapování Couettova-Taylorova proudění pomocí elektrodifuzní
Wouahbi, F. ; Havlica, Jaromír ; Allaf, K. ; Sobolík, Václav
Three Taylor instabilities between coaxial cylinders are studied: Taylor Vortex Flow, Wavy Vortex Flow and Modulated Wavy Flow. The aim of the present in vestigation is to extended our knowledge about spatial distribution of wall shear rate components and their fluctuation freguencies in these flow regime. The vortex height, azimuthal wave number and their amplitude and modulation frequency is also investigated.
Rovnováha kapalina-kapalina v binárním systému [bmim][PF6] + 1-Butanol. Experimentální data a jejich termodynamický popis
Bendová, Magdalena ; Wagner, Zdeněk
The present contribution addresses a study of liquid-liquid equilibrium in binary system 1-butyl-3-methylimidazolium hexafluorophosphate (abbr. [bmim][PF6]) + 1-butanol. Experimental liquid phase behaviour was investigated using a volumetric method and a cloud-point method, the former enabling us to obtain tie lines (compositions of equilibrium phases), the latter providing points of the solubility curve.

National Repository of Grey Literature : 36 records found   beginprevious21 - 30next  jump to record:
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