Sinteza i pročišćavanje etilnih estera masnih kiselina ultrafiltracijom

master's thesis

• Title (english): Synthesis and purification of fatty acid ethyl ester by ultrafiltration
• Author: Ivan Pucko
• Mentor: Fabio Faraguna (mentor)
• Committee member: Fabio Faraguna (predsjednik povjerenstva)
• Committee member: Marin Kovačić (član povjerenstva)
• Committee member: Ante Jukić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2019-07-12, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Membranski procesi su separacijski procesi kojima se pomoću membrane ulazna struja odvaja na retentat (dio ulazne struje koji se zadržao na membrani) i permeat (dio ulazne struje koji je prošao kroz membranu). Odvajanje je temeljeno na sposobnosti membrane da jednu komponentu iz ulazne smjese lakše transportira, u odnosu na druge komponente, što proizlazi iz fizikalnih i kemijskih svojstava membrane i komponente koju prožima. U ovome radu provedena je membranska ultrafiltracija smjese etilnih estera viših masnih kiselina, etanola, suncokretovog ulja i glicerola. Za razdvajanje korištene su 3 vrste polimernih membrana – PT membrane proizvedene od polietersulfona s graničnom molekulskom masom (MWCO) od 5000 Da te poliamidne membrane GK s MWCO od 3000 Da i GH s MWCO od 2000 Da. Esteri viših masnih kiselina (biodizel) proizvedeni su reakcijom transesterifikacije, a cilj je bio izravno iz reakcijske smjese izdvojiti samo etilne estere. Najučinkovitija membrana za uklanjanje glicerola pokazala se PT membrana pri radnom tlaku od 6 bara (6×105 Pa) koja je uklonila 38,3 % glicerola i 32,5 % etanola iz smjese. Za uklanjanje etanola iz smjese najučinkovitija je bila GK membrana također pri radnome tlaku od 6 bara koja je uklonila 57,8 % etanola iz smjese i 8,2 % glicerola.

Abstract (english)

Membrane separation is a process in which the membrane separates the inlet stream on retentate (part of the inlet stream retained on the membrane) and the permeate (part of the inlet stream that passed through the membrane). Separation is based on the ability of the membrane to transport one component from the inlet stream more easily than other components based on the physical and chemical properties of the membrane and the permeating component. In this thesis a membrane ultrafiltration separation of fatty acid ethyl esters from mixture of ethanol, sunflower oil and glycerol, was conducted. Three types of polymer membranes were used: PT membrane produced by polyethersulfone with a molecular weight cut-off (MWCO) of 5000 Da and two polyamide membranes, GK with a MWCO of 3000 Da and GH with a MWCO of 2000 Da. Fatty acid ethyl ester (biodiesel) were produced by transesterification and the goal was to isolate them directly from the mixture after the reaction. The most efficient membrane for glycerol removal is PT membrane working at 6 bar (6×105 Pa). It reduced the concentration of glycerol by 38,3 % and ethanol by 32,5 % compared to starting mixture. The most efficient membrane for reducing the concentration of ethanol from the starting mixture is GK membrane under the same conditions (6 bar) and reduction of 57,8 % of ethanol and 8,2 % of glycerol, compared to concentration in starting mixture, was achieved.

• Keywords: biodizel; etanol; FAEE; membranski procesi; ultrafiltracija
• Keywords (english): biodiesel; ethanol; FAEE; membrane process; ultrafiltration
• Language: croatian
• URN:NBN: urn:nbn:hr:149:441410
• 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: Access restricted to students and staff of home institution
• Created on: 2022-02-27 11:49:41