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master's thesis
Priprava aditiva za goriva na temelju stearinske kiseline
Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. urn:nbn:hr:149:952366
Benić, Darija
University of Zagreb
Faculty of Chemical Engineering and Technology

Institutional repository: Repository of Faculty of Chemical Engineering and Technology University of Zagreb

Cite this document

Benić, D. (2020). Priprava aditiva za goriva na temelju stearinske kiseline (Master's thesis). Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:149:952366

Benić, Darija. "Priprava aditiva za goriva na temelju stearinske kiseline." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:149:952366

Benić, Darija. "Priprava aditiva za goriva na temelju stearinske kiseline." Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, 2020. https://urn.nsk.hr/urn:nbn:hr:149:952366

Benić, D. (2020). 'Priprava aditiva za goriva na temelju stearinske kiseline', Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, accessed 30 June 2024, https://urn.nsk.hr/urn:nbn:hr:149:952366

Benić D. Priprava aditiva za goriva na temelju stearinske kiseline [Master's thesis]. Zagreb: University of Zagreb, Faculty of Chemical Engineering and Technology; 2020 [cited 2024 June 30] Available at: https://urn.nsk.hr/urn:nbn:hr:149:952366

D. Benić, "Priprava aditiva za goriva na temelju stearinske kiseline", Master's thesis, University of Zagreb, Faculty of Chemical Engineering and Technology, Zagreb, 2020. Available at: https://urn.nsk.hr/urn:nbn:hr:149:952366

Metadata
TitlePriprava aditiva za goriva na temelju stearinske kiseline
Title (english)Preparation of fuel aditives based on stearic acid
AuthorDarija Benić
MentorAnte Jukić (mentor)
MentorFabio Faraguna (komentor)
Committee memberAnte Jukić (predsjednik povjerenstva)
Committee memberFabio Faraguna (član povjerenstva)
Committee memberMarijana Kraljić Roković (član povjerenstva)
GranterUniversity of Zagreb
Faculty of Chemical Engineering and Technology
Zagreb
Defense date and country2020-09-29, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
U ovom radu pripravljeni su aditivi za goriva na temelju stearinske kiseline uz primjenu različitih alkohola. Aditivi su sintetizirani reakcijom esterifikacije koja se odvijala u uljnoj kupelji pri 60 °C tijekom 3,5 h. Kao katalizator korištena je sumporna kiselina te kloroform kao otapalo. Alkoholi odabrani za provedbu sinteze su benzil alkohol, furfuril alkohol te oktanol. Nakon provedene esterifikacije, sintetizirani aditivi pročišćavani su na rotacijskom uparivaču i vakuumskom sušioniku kako bi uklonili neizreagirani alkohol, a za uklanjanje zaostale stearinske kiseline korištena je kolonska kromatografija. Budući da kolonskom kromatografijom stearinska kiselina nije uklonjena u potpunosti, primijenjena je i metoda uklanjanja precipitacijom. Nakon postupaka pročišćavanja aditiva, kako bi se detektirale prisutne funkcionalne skupine u cilju praćenja strukturnih promjena, sintetizirani aditivi analizirani su na FTIR spektrometru, a uzorci su snimljeni ATR metodom. Nakon obrade dobivenih FTIR-ATR spektara, pojedini uzorci aditiva poslani su na analizu na NMR spektrometar gdje je pomoću dobivenih NMR spektara određeno iskorištenje reakcije esterifikacije, čistoća te sastav dobivenih aditiva. Čistoća sintetiziranog benzil stearata nakon pročišćavanja iznosi 87,65 %. Furfuril stearat pokazao je iskorištenje od 6,24 % pri čemu izrazito malo iskorištenje možemo pripisati degradaciji, odnosno prelasku furfurila u drugi spoj uporabom sumporne kiseline.
Abstract (english)
In this paper, fuel additives based on stearic acid were prepared using different alcohols. The additives were synthesized by an esterification reaction which took place in an oil bath at 60 °C for 3,5 h. Sulfuric acid was used as catalyst and chloroform as solvent. The alcohols selected for the synthesis are benzyl alcohol, furfuryl alcohol and octanol. After esterification, the synthesized additives were purified on a rotary evaporator and vacuum dryer to remove unreacted alcohol and column chromatography was used to remove residual stearic acid. Since stearic acid was not completely removed by column chromatography, the removal method by precipitation was also applied. After the additive purification procedure, in order to detect the functional groups present to monitor structural changes, the synthesized additives were analyzed on a FTIR spectrometer, and the samples were recorded by the ATR method. After processing the obtained FTIR-ATR spectra, individual samples of additives have been sent for analysis on a NMR spectrometer where the yield of esterification reaction, purity and composition of the obtained additives were determined using the obtained NMR spectra. The purity of the synthesized benzyl stearate after purification is 87,65 %. Furfuryl stearate showed a yield of 6,24 %, with extremely low yields attributable to the degradation or conversion of furfuryl to another compound using sulfuric acid.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:149:952366
ProjectNumber: 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 programmeTitle: Applied Chemistry - Graduate study; specializations in: Environmental chemistry and green technologies, Advanced materials and technologies, Applied organic chemistry
Course: Environmental chemistry and green technologies
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra primijenjene kemije (magistar/magistra primijenjene kemije)
Type of resourceText
File originBorn digital
Access conditionsClosed access
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Created on2022-02-28 15:28:07