Ravnoteža kapljevina-kapljevina u sustavima s niskotemperaturnim eutektičkim otapalima na osnovi betaina i propilen-glikola

master's thesis

• Title (english): Liquid-liquid equilibrium in the systems containing deep eutectic solvents based on betaine and propylene glycol
• Author: Anđela Krišto
• Mentor: Marko Rogošić (mentor)
• Committee member: Marko Rogošić (predsjednik povjerenstva)
• Committee member: Aleksandra Sander (član povjerenstva)
• Committee member: Jasna Prlić Kardum (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2018-07-11, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering; Mechanical, Thermal and Separation Processes

Abstract

Zadatak ovog rada je eksperimentalno proučiti ravnotežu u trokomponentnim sustavima kapljevina-kapljevina s niskotemperaturnim eutektičnim otapalima na osnovi betaina i propilen-glikola. Za niskotemperaturna eutektična otapala (engl. deep eutectic solvent, DES) korišteni su molarni omjeri betaina i propilen-glikola 1:4 i 1:5. Pripremljenim eutektičnim otapalima određen je indeks loma, pH-vrijednost, toplinska provodnost, temperaturna difuzivnost, toplinski kapacitet, električna vodljivost, gustoća i viskoznost. Niskotemperaturna eutektična otapala koriste se u ovom slučaju za ekstrakciju dušikovih i sumpornih spojeva iz otopine ugljikovodika koji su glavne komponente različitih tipova benzina. Kroz eksperimente s različitim masenim udjelima komponenata dobivena je ukupna slika ravnoteže 15 trokomponentnih sustava pri 25 °C i atmosferskom tlaku. Utvrđeno je da su istraženi DES-ovi potencijalno prikladniji za denitrifikaciju nego za desulfurizaciju. Ravnoteže su s uspjehom opisane modelima NRTL i UNIQUAC, a nešto bolje slaganje s eksperimentom pokazao je NRTL.

Abstract (english)

The primary goal of this thesis is to examine experimentally and describe the liquid-liquid equilibria in ternary systems containing deep eutectic solvents (DES) based on betaine and propylene-glycol. Molar ratios 1:4 and 1:5 of betaine vs. propylene-glycol were used for deep eutectic solvents. The complete characterization of DESs was performed with respect to refractive index, pH value, thermal conductivity, tenperature diffusivity, heat capacity, electrical conductivity, density and viscosity. Deep eutectic solvents are used in this case for the extraction of nitrogen- and sulfur-based compounds from solutions of hydrocarbons which are main components of various types of gasoline. Through experiments with varying mass fractions of components, an overall image of equilibrium was acquired for 15 ternary systems at 25 °C and atmospheric pressure. The investigated DESs were found potentially more suitable for denitrification than for desulfurization. The equilibria have been modelled successfully by NRTL and UNIQUAC models; a somewhat better description of experimental data was obtained by NRTL.

• Keywords: niskotemperaturna eutektična otapala; ravnoteža kapljevina-kapljevina; denitrifikacija; desulfurizacija; pročišćavanje motornih benzina; NRTL; UNIQUAC
• Keywords (english): deep eutectic solvents; liquid-liquid equilibria; denitrification; desulfurization; gasoline purification; NRTL; UNIQUAC
• Language: croatian
• URN:NBN: urn:nbn:hr:149:315230
• Study programme: Title: Chemical Engineering - Graduate study; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka kemijskog inženjerstva (magistar/magistra inženjer/inženjerka kemijskog inženjerstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2020-06-02 10:34:43