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## Study on vapor – liquid equilibrium

#### Abstract

The work is focused on the methodology of the vapor – liquid equilibrium determination using a didactic measurement set in the Laboratory of Process Thermodynamics at the Faculty of Chemical and Process Engineering. The purpose of this thesis is elaboration of measurement procedure for a new two-component mixture and thermodynamic consistency analysis of the obtained measurement results. The first part of this work discusses the basic thermodynamic relations, which are used to describe phase equilibrium and provides an overview of the experimental methods for investigation of vapor – liquid equilibrium. The second part contains characteristics of the research stand and description of the experimental procedure. The refractive index calibration curves were determined to analyze the composition of acetone – water system and acetone – 1-propanol system. The acetone – 1-propanol system was chosen for further experimental tests carried out with the use of the modified Othmer still, because of the monotonicity of the calibration curve of the refractive index as a function of the mixture’s composition. A series of measurements of vapor – liquid equilibrium data were performed and the results were analyzed by determining the activity coefficients of liquid phase components. The thermodynamic consistency test was also performed and the parameters of model equations for the activity coefficients in two-component solutions were determined. For this purpose, the equations of Margules, van Laar, Margules-Wohl and Wilson were used, which subsequently allowed for calculation of boiling points and the equilibrium composition of the vapor phase as a function of liquid phase composition. The calculated values were compared with experimental data and presented in the form of a phase diagram for the isobar. It was possible to improve the thermodynamic consistency of the measurements as a result of additional thermal insulation of the Othmer still and better power control in the heated zones.
Diploma type
Engineer's / Bachelor of Science
Diploma type
Engineer's thesis
Author
Adrianna Marta Kruszyńska (FCPE) Adrianna Marta Kruszyńska,, Faculty of Chemical and Process Engineering (FCPE)
Title in Polish
Supervisor
Piotr M. Machniewski (FCPE/DPKT) Piotr M. Machniewski,, Department of Process Kinetics and Thermodynamics (FCPE/DPKT)Faculty of Chemical and Process Engineering (FCPE)
Certifying unit
Faculty of Chemical and Process Engineering (FCPE)
Affiliation unit
Department of Process Kinetics and Thermodynamics (FCPE/DPKT)
Study subject / specialization
, Inżynieria Chemiczna i Procesowa
Language
(pl) Polish
Status
Finished
Defense Date
14-05-2019
Issue date (year)
2019
Pages
50
Internal identifier
DICHP-2906
Reviewers
Piotr M. Machniewski (FCPE/DPKT) Piotr M. Machniewski,, Department of Process Kinetics and Thermodynamics (FCPE/DPKT)Faculty of Chemical and Process Engineering (FCPE) Jakub M. Gac (FCPE/CIPE) Jakub M. Gac,, Chair of Integrated Process Engineering (FCPE/CIPE)Faculty of Chemical and Process Engineering (FCPE)
Keywords in Polish
równowaga ciecz – para, aparat Othmera, współczynnik aktywności, test zgodności termodynamicznej
Keywords in English
vapor – liquid equilibrium, the Othmer still, activity coefficient, thermodynamic consistency test
Abstract in Polish
File
• File: 1
urn:pw-repo:WUT482ad61b5bbb4a1185a5622ed5d603ec