Sinteza heksilnih estera masnih kiselina i primjenska svojstva mješavina s mineralnim dizelom

undergraduate thesis

• Title (english): Synthesis and investigation of application properties of heksyl fatty acid esters and its mixtures with mineral diesel
• Author: Andrea Knežević
• Mentor: Fabio Faraguna (mentor)
• Committee member: Fabio Faraguna (predsjednik povjerenstva)
• Committee member: Ante Jukić (član povjerenstva)
• Committee member: Marin Kovačić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Chemical Engineering and Technology; Zagreb
• Defense date and country: 2022-09-20, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Chemical Engineering

Abstract

Ubrzano iscrpljivanje ograničenih zaliha fosilnih goriva i negativan učinak njihova izgaranja na okoliš podižu svijest za potragom i primjenom alternativnog goriva. Tako se mineralni dizel, koji se koristi kao izvor energije za dizel-motore u prijevoznim sredstvima, miješa s biodizelom kako bi se dobila ekološki prihvatljivija goriva. U ovom radu heksilni esteri masnih kiselina (FAHE), kao biodizel, sintetizirani su iz otpadnog suncokretovog ulja. FAHE je pročišćen i namiješavan s mineralnim dizelom i alkoholom heksanolom te se ispitao utjecaj volumnog udjela dodanog FAHE i heksanola na primjenska svojstva ispitivanih mješavina. Ispitana su gustoća, kinematička viskoznost, napetost površine i temperatura početka i maksimuma kristalizacije. Dobiveni rezultati ukazuju na to da se dodatkom FAHE mineralnom dizelu povećava gustoća, kinematička viskoznost i napetost površine te povisuju temperature kristalizacije mješavina. Dodatak heksanola mješavinama FAHE i mineralnog dizela pokazao je suprotan efekt. Ipak, sve su mješavine zadovoljile zahtjeve prema normi EN 590 za ispitana svojstva.

Abstract (english)

The accelerated depletion of limited fossil fuel supplies and the negative effect of their combustion on the environment raise awareness and importance of the research and the use of alternative fuel. Thus, mineral diesel, which is used as an energy source for diesel engines in vehicles, is blended with biodiesel in order to obtain more environmentally friendly fuels. In this work, fatty acid hexyl esters (FAHE), as biodiesel, were synthesized from waste sunflower oil. FAHE was purified and blended with mineral diesel and hexanol in different volume fractions to determine the influence of FAHE and hexanol on the blend’s application properties as a transportation fuel. Density, kinematic viscosity, surface tension, onset and peak temperatures of crystallization were tested. The obtained results show that the addition of FAHE to mineral diesel increases blend’s density, kinematic viscosity and surface tension and increases the crystallization temperatures. Addition of hexanol to blends of FAHE and mineral diesel showed the opposite effect. Nevertheless, all blends met the requirements of EN 590 standard for the tested properties.

• Keywords: mineralni dizel; heksilni esteri masnih kiselina; heksanol; mješavine; primjenska svojstva
• Keywords (english): mineral diesel; hexyl esters of fatty acids; hexanol; blends; application properties
• Language: croatian
• URN:NBN: urn:nbn:hr:149:186330
• Project: Number: UIP-2019-04-5242; Title: Razvoj funkcionalnih biogoriva i (bio)aditiva te ispitivanje primjenskih svojstava mješavina s mineralnim gorivima; Title: Development of functional biofuels and (bio)additives and characterization of blends with mineral fuels; Acronym: FunBioFA; Leader: Fabio Faraguna; Jurisdiction: Croatia; Funder: HRZZ; Funding stream: UIP
• Study programme: Title: Applied Chemistry - Undergraduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry; Course: Applied organic chemistry; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) primijenjene kemije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Access restricted to students and staff of home institution
• Created on: 2023-03-01 13:11:56