Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.advisorYilmaz, Selahattin
dc.contributor.authorMutlu, Vahide Nuran-
dc.descriptionThesis (Master)--Izmir Institute of Technology, Materials Science and Engineering, Izmir, 2014en_US
dc.descriptionIncludes bibliographical references (leaves: 44-45)en_US
dc.descriptionText in English; Abstract: Turkish and Englishen_US
dc.descriptionxi, 47 leavesen_US
dc.description.abstractIn this study, it was pursued to develop acidic mesoporous catalysts for esterification of cetyl alcohol by palmitic acid. For this, Zr incorporated SBA-15 was prepared by hydrothermal synthesis. Zr-SBA-15 was used both as a catalyst support and as a catalyst itself. WO3 loading onto the Zr-SBA-15 was performed by incipient wetness impregnation. Additionally, WO3-ZrO2 catalyst was prepared by co-precipitation with two different contents of WO3 (15 wt% and 20 wt%). The reaction tests were carried out in mesitylene under reflux conditions. Zr was incorporated into SBA-15 successfully. The surface areas of Zr-SBA-15 and WO3/Zr-SBA-15 catalysts were significantly higher than that of WO3-ZrO2. Loading of WO3 decreased the surface area of Zr-SBA-15. The acidity of the WO3/Zr-SBA-15 with 15 wt% WO3 was higher than that of with 20 wt% WO3. Moreover, increasing the calcination temperature from 700 to 800 oC resulted in the increase of acidity. The activity of the catalysts differed. The only product obtained was cetyl palmitate. Under the test conditions it was found that the reaction rate was not limited by equilibrium. Zr-SBA-15 provided the highest conversion (64 %) which corresponded to cetyl palmitate yield of 63% among other mesoporous catalysts because of its high surface area (600.3 m2/g) and acidity (0.152 mmol NH3/g cat). This catalyst did not show leaching. WO3/Zr-SBA-15 based catalys tests showed that catalyst activity increased by increasing calcination temperature. This was atributed to better dispersion of W. The conversion of cetyl alcohol did not change much with more W loading.en_US
dc.publisherIzmir Institute of Technologyen_US
dc.subjectCatalytic reactionen_US
dc.subjectAcid catalystsen_US
dc.subjectCatalytic materialsen_US
dc.subjectMesoporous catalystsen_US
dc.titleDevelopment of tungsten loaded and zirconia incorporated mesoporous catalysts for esterification of palmitic acid with cetyl alcoholen_US
dc.title.alternativePalmitik asitin setil alkol ile esterifikasyonu için tungsten yüklü zirkonya içeren mezogözenekli katalizörlerin geliştirilmesien_US
dc.typeMaster Thesisen_US
dc.institutionauthorMutlu, Vahide Nuran-
dc.departmentThesis (Master)--İzmir Institute of Technology, Materials Science and Engineeringen_US
item.fulltextWith Fulltext-
item.openairetypeMaster Thesis-
Appears in Collections:Master Degree / Yüksek Lisans Tezleri
Files in This Item:
File Description SizeFormat 
10013410.pdfMasterThesis1.91 MBAdobe PDFThumbnail
Show simple item record

CORE Recommender

Page view(s)

checked on Jun 5, 2023


checked on Jun 5, 2023

Google ScholarTM


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.