Show simple item record

dc.contributor.advisorŞeker, Erolen
dc.contributor.authorUmdu, Emin Selahattinen
dc.date.accessioned2014-07-22T13:48:37Z
dc.date.available2014-07-22T13:48:37Z
dc.date.issued2012en
dc.identifier.urihttp://hdl.handle.net/11147/2930
dc.descriptionThesis (Doctoral)--Izmir Institute of Technology, Chemical Engineering, Izmir, 2012en
dc.descriptionIncludes bibliographical references (leaves. 56-60)en
dc.descriptionText in English; Abstract: Turkish and Englishen
dc.descriptionx, 74 leavesen
dc.description.abstractThe objective of this study is to investigate crystallite-size effect for oxides of transition metals iron supported on magnesium oxide (MgO) and cerium oxide (CeO2) modified alumina (Al2O3) and the effect of the basicity and/or basic strength of support material, on activity and hydrogen selectivity in the steam reforming of glycerol. Crystallite size effect is observed for MgO and Fe on MgO/Al2O3. It is observed that larger MgO crystallites size shifts gaseous product selectivity towards CO. Further as crystallite size is becomes higher than ~5 nm for Fe for gas product selectivity decreases. Basisity has also a similar behaviour; higher basisity or presence of unidentate carbonate basic sites observed at 865 and 800 cm-1 FTIR bands for CeO2 promoted catalysts hinder CO formation and promotes CO2 formation. This also results in high activity of steam reforming. Also basisity studies shows that inorganic carboxylate catalyst site with FTIR band 1535 and 1410 cm-1 is dominantly effective for gaseous product selectivity. High total basisity do not required for high glycerol conversion, yet high total basisity results in high gaseous product selectivity. Considering studied catalysts and their catalytic activities it can be concluded that MgO and Fe modified catalysts shows better activity for syngas production due to their basic and crystalline properties. And CeO2 modified catalysts or MgO catalysts with crystallite sizes lower than 5 nm are shows better performances for CO free producten
dc.language.isoengen
dc.publisherIzmir Institute of Technologyen
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subject.lcshCatalystsen
dc.subject.lcshGlycerinen
dc.subject.lcshChemical reactionsen
dc.subject.lcshBiomassen
dc.subject.lcshHydrogenen
dc.titleHydrogen production from biomass on structured catalystsen
dc.typedoctoralThesisen
dc.contributor.departmentIzmir Institute of Technology. Chemical Engineeringen
dc.relation.publicationcategoryTezen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record