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Title:RAZVOJ METODE ZA DOLOČEVANJE VISKOZNOSTI SUBSTANC V SISTEMIH S SUPERKRITIČNIMI FLUIDI
Authors:ID Horvat, Marjan (Author)
ID Knez, Željko (Mentor) More about this mentor... New window
ID Knez Marevci, Maša (Comentor)
Files:.pdf UN_Horvat_Marjan_2016.pdf (4,47 MB)
MD5: 08BEE103587BF516B27B7D6BF1F19F31
 
Language:Slovenian
Work type:Undergraduate thesis
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Uporaba superkritičnih fluidov vse bolj narašča. V literaturi najdemo veliko podatkov o obnašanju sistema pri določenih pogojih. Zelo malo pa je podatkov za dvofazne sisteme, ki so zelo pomembni za načrtovanje novih industrijskih postopkov. Tako smo v diplomskem delu preizkusili do sedaj neuporabljeno metodo določanja viskoznosti sistema polietilen glikol/CO2 pri različnih tlakih in z različnimi molskimi masami polietilen glikola ter ugotovili, kako oba dejavnika vplivata na viskoznost sistema. Omenjen sistem PEG/CO2 smo preučevali v tlačnem območju od 10 MPa do 35 MPa, pri konstantni temperaturi 333 K. Ugotovili smo, da se gostota sistema PEG/CO2 obnaša kot funkcija tlaka. Vpliv molske mase je precej manjši. Iz diagramov viskoznost/tlak za različne molske mase polietilen glikola je razvidno, da je zmanjšanje viskoznosti bolj izrazito pri nižjih tlakih.
Keywords:superkritični fluid, ogljikov dioksid, polietilen glikol, viskoznost
Place of publishing:Maribor
Publisher:[M. Horvat]
Year of publishing:2016
PID:20.500.12556/DKUM-64254 New window
UDC:533.6.011.12:54-139(043.2)
COBISS.SI-ID:20335126 New window
NUK URN:URN:SI:UM:DK:2SUXACLB
Publication date in DKUM:25.10.2016
Views:2715
Downloads:125
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Secondary language

Language:English
Title:DEVELOPMENT OF A METHOD FOR THE DETERMINATION OF VISCOSITY OF DIFFERENT SUBSTANCES IN THE SYSTEMS WITH SUPERCRITICAL FLUIDS
Abstract:Applications supercritical fluids are growing rapidly. In the literature a lot of information about the behavior of the system under certain conditions can be found. On the other hand, there is lack of data for two-phase systems, which are very important for design of new industrial processes. A new method for determining viscosity of system multi-compound systems at elevated pressures has been developed. Viscosity of different molar weight polyethylene glycols has been evaluated after addition of CO2. System of PEG/CO2 was studied in the pressure range of 10 MPa to 35 MPa at a constant temperature of 333 K. The method requires previos knowledge of system density. Density of the system PEG/CO2 behaves as a function of pressure. Influence of the molar weight is much smaller. Diagrams presenting viscosity as a fanction of pressure clearly demonstrate that reduction in viscosity is more pronounced at lower pressures.
Keywords:supercritical fluid, carbon dioxide, polyethylene glycol, a viscosity


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