diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje
Katarina Zavrl (Author), Darja Pečar (Mentor), Andreja Goršek (Co-mentor)

Abstract

Namen diplomskega dela je bil sintetizirati in okarakterizirati kislinske katalizatorje na osnovi mezoporozne silike MCM-41 in SBA-15. Na siliko smo z metodo mokre impregnacije vezali Al³⁺ in Ni²⁺ ione, ter učinkovitost katalizatorjev preverjali z modelno reakcijo esterifikacije miristinske kisline v metil miristat, kjer smo največjo presnovo dosegli s katalizatorjem Al-SBA-15. Sintetizirane katalizatorje smo okarakterizirali z Brunauer-Emmett-Tellerjevo metodo, dinamičnim sipanjem svetlobe, diferenčno dinamično kalorimetrijo, infrardečo spektroskopijo s Fourierjevo transformacijo, vrstično elektronsko mikroskopijo in NH3 temperaturno programirano desorpcijo. Na osnovi rezultatov karakterizacije sklepamo na prisotnost Si-O-Si in Si-OH skupin ter prisotnost močnih in šibkih kislinskih mest. V povprečju je bila specifična površina katalizatorjev na osnovi MCM-41 914,6 m2 g-1, povprečna velikost delcev 300,6 nm, specifična površina katalizatorjev na osnovi SBA-15 pa 664,6 m2 g-1 ter velikost delcev 1092,0 nm.

Keywords

mezoporozna silika;MCM-41;SBA-15;heterogena kataliza;esterifikacija miristinske kisline;diplomske naloge;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher: [K. Zavrl]
UDC: 66.091.3:546.284-44(043.2)
COBISS: 213680387 Link will open in a new window
Views: 61
Downloads: 13
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: Synthesis and characterization of catalysts based on mesoporous silica
Secondary abstract: The purpose of thesis was synthesis and characterization of acid catalysts based on mesoporous silicas MCM-41 and SBA-15. The silica was functionalized with Al³⁺ and Ni²⁺ ions using the wet impregnation method. The efficiency of the catalysts was checked using a model esterification reaction of myristic acid into methyl myristate, where the highest conversion was achieved with the Al-SBA-15 catalyst. The synthesized catalysts were characterized using Brunauer-Emmett-Teller method, dynamic light scattering, differential scanning calorimetry, Fourier-transform infrared spectroscopy, scanning electron microscopy, and NH3 temperature-programmed desorption. methods. The characterization results confirmed the presence of Si-O-Si and Si-OH groups in the material and the presence of strong and weak acidic sites for the binding of active groups. On average, the specific surface area of MCM-41-based catalysts was 914,6 m² g-1, with an average particle size of 300,6 nm, while the surface area measured for SBA-15-based catalysts was 664,7 m² g-1 with a particle size of 960,2 nm.
Secondary keywords: mesoporous silica;heterogeneous catalysis;esterification of myristic acid;
Type (COBISS): Bachelor thesis/paper
Thesis comment: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages: 1 spletni vir (1 datoteka PDF (XI, 40 f.))
ID: 24814431
Recommended works:
, diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje
, diplomsko delo univerzitetnega študijskega programa I. stopnje
, diplomsko delo visokošolskega strokovnega študijskega programa I. stopnje
, diplomsko delo univerzitetnega študijskega programa I. stopnje
, magistrsko delo