Kinetics of methane oxidation in a high pressure jetstirred reactor : experimental results

The droplet deformation in dispersing units of high-pressure homogenizers (HPH) is examined experimentally and numerically. Due to the small size of common homogenizer nozzles, the visual analysis of the transient droplet generation is usually not possible. Therefore, a scaled setup was used. The droplet deformation was determined quantitatively by using a shadow imaging technique. It is shown that the influence of transient stresses on the droplets caused by laminar extensional flow upstream the orifice is highly relevant for the droplet breakup behind the nozzle. Classical approaches based on an equilibrium assumption on the other side are not adequate to explain the observed droplet distributions. Based on the experimental results, a relationship from the literature with numerical simulations adopting different models are used to determine the transient droplet deformation during transition through orifices. It is shown that numerical and experimental results are in fairly good agreement at limited settings. It can be concluded that a scaled apparatus is well suited to estimate the transient droplet formation up to the outlet of the orifice.

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Effects of High-Pressure Pretreatment and Calcium Soaking on the Texture Degradation Kinetics of Carrots during Thermal Processing

Journal of Food Science ◽

10.1111/j.1365-2621.2004.tb10711.x ◽

2006 ◽

Vol 69 (5) ◽

pp. E205-E211 ◽

Cited By ~ 72

Author(s):

D.N. Sila ◽

C. Smout ◽

T.S. Vu ◽

M.E. Hendrickx

Keyword(s):

High Pressure ◽

Thermal Processing ◽

Degradation Kinetics ◽

Kinetics Of

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HIGH-PRESSURE DESTRUCTION KINETICS OF SPOILAGE AND PATHOGENIC BACTERIA IN RAW MILK CHEESE

Journal of Food Process Engineering ◽

10.1111/j.1745-4530.2007.00114.x ◽

2007 ◽

Vol 30 (3) ◽

pp. 357-374 ◽

Cited By ~ 16

Author(s):

Y. SHAO ◽

H.S. RAMASWAMY ◽

S. ZHU

Keyword(s):

High Pressure ◽

Pathogenic Bacteria ◽

Raw Milk ◽

Destruction Kinetics ◽

Raw Milk Cheese ◽

Kinetics Of

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Investigation of cultivated lavender (Lavandula officinalis L.) extraction and its extracts

Chemical Industry and Chemical Engineering Quarterly ◽

10.2298/ciceq120715103n ◽

2014 ◽

Vol 20 (1) ◽

pp. 71-86 ◽

Cited By ~ 13

Author(s):

Vesna Nadjalin ◽

Zika Lepojevic ◽

Mihailo Ristic ◽

Jelena Vladic ◽

Branislava Nikolovski ◽

...

Keyword(s):

Gas Chromatography ◽

Essential Oil ◽

Experimental Results ◽

Flame Ionisation Detector ◽

Main Components ◽

Lavandula Officinalis ◽

Physical And Chemical ◽

Kinetics Of ◽

Flame Ionisation ◽

Ionisation Detector

In this study essential oil content was determined in lavender flowers and leaves by hydrodistillation. Physical and chemical characteristics of the isolated oils were determined. By using CO2 in supercritical state the extraction of lavender flowers was performed with a selected solvent flow under isothermal and isobaric conditions. By the usage of gas chromatography in combination with mass spectrometry (GC/MS) and gas chromatography with flame ionisation detector (GC/FID) the qualitative and quantitative analysis of the obtained essential oil and supercritical extracts (SFE) was carried out. Also, the analysis of individual SFE extracts obtained during different extraction times was performed. It turned out that the main components of the analysed samples were linalool, linalool acetate, lavandulol, caryophyllene oxide, lavandulyl acetate, terpinen-4-ol and others. Two proposed models were used for modelling the extraction system lavender flower - supercritical CO2 on the basis of experimental results obtained by examining the extraction kinetics of this system. The applied models fitted well with the experimental results.

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Etude par spectrométrie infrarouge de l'action de solvants aprotiques sur l'association ester–eau et ester–Ba2+. Discussion du rôle catalytique du solvant et de l'ion Ba2+ dans l'hydrolyse alcaline du propionate de methyle

Canadian Journal of Chemistry ◽

10.1139/v79-067 ◽

1979 ◽

Vol 57 (4) ◽

pp. 400-403 ◽

Cited By ~ 1

Author(s):

Anne Le Narvor ◽

Pierre Saumagne

Keyword(s):

Ir Spectra ◽

Charge Density ◽

Carbonyl Group ◽

Alkaline Hydrolysis ◽

Experimental Results ◽

Methyl Propionate ◽

Orbital Control ◽

Different Types ◽

Kinetics Of ◽

Better Than

The ir spectra of mixtures of methyl propionate/water and methyl propionate/Ba2+ in dimethylsulfoxide and in acetonitrile have been recorded in the region of the νCO mode of the ester. Evidence is presented to indicate the presence of different types of complexes; their concentration was determined as a function of the composition of the medium. The spectroscopic results are compared to those from the kinetics of the alkaline hydrolysis in the same conditions. It is demonstrated that the orbital control explains the experimental results better than does the charge density on the carbon of the carbonyl group. [Journal translation]

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