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dc.creatorStanković, Miroslav
dc.creatorGabrovska, Margarita
dc.creatorKrstić, Jugoslav
dc.creatorTzvetkov, P.
dc.creatorShopska, M.
dc.creatorTsacheva, T.
dc.creatorBanković, Predrag
dc.creatorEdreva-Kardjieva, R.
dc.creatorJovanović, D.
dc.date.accessioned2019-01-30T17:21:32Z
dc.date.available2019-01-30T17:21:32Z
dc.date.issued2009
dc.identifier.issn1381-1169
dc.identifier.urihttp://cer.ihtm.bg.ac.rs/handle/123456789/593
dc.description.abstractSilver modified Mg-Ni/diatomite materials with ratios of SiO2/Ni = 1.07 and Mg/Ni = 0.1, differing in Ag content (Ag/Ni = 0.025 and 0.1) were prepared by the precipitation-deposition method. The effects of silver presence and content on the structure, morphology, texture and H2-adsorption capacity of the obtained precursors were studied by X-ray diffraction, scanning electron microscopy, Hg-porosimetry and H2-chemisorption techniques. The catalytic performance of the corresponding catalysts in the soybean oil hydrogenation was investigated. The increase of the silver loading resulted in the development of macroporosity and increase in the total sample porosity. The decrease of both H2-adsorption capacity and hydrogenation activity are related to the metallic silver covering and blocking effects on the Ni2+ species, thus hampering the access of hydrogen. The decrease of hydrogenation activity and favorable limiting of cis-trans isomerization on the silver modified catalyst are explained by Horiuti-Polanyi mechanism based on the assumption that hydrogenation and isomerization proceed at the same active metallic nickel sites via half-hydrogenated intermediates. It was shown that the adjustment of the catalyst composition by changing the content of silver modifier offers the possibility to control the total amount of solid fat content, stearic acid and detrimental trans fatty acids in the hydrogenated derivatives. The catalyst with higher silver content is proposed as a promising candidate for selective edible oil hydrogenation catalyst.en
dc.publisherElsevier Science Bv, Amsterdam
dc.relationNational Science Fund at the Ministry of Education and Science of Bulgaria for the partial financial support (Project X-1411). The authors (M.St., J.K., P.B. and D.J.) greatly acknowledge the support of the Serbian Ministry of Science through the Project
dc.rightsrestrictedAccess
dc.sourceJournal of Molecular Catalysis A: Chemical
dc.subjectcis-trans isomerizationen
dc.subjectMg-Ni/diatomite catalysten
dc.subjectSilver modifieren
dc.subjectSoybean oil hydrogenation activityen
dc.subjectTextureen
dc.titleEffect of silver modification on structure and catalytic performance of Ni-Mg/diatomite catalysts for edible oil hydrogenationen
dc.typearticle
dc.rights.licenseARR
dcterms.abstractГабровска, М.; Крстић, Југослав; Јовановић, Д.; Банковић, Предраг; Тсацхева, Т.; Схопска, М.; Станковић, Мирослав; Тзветков, П.; Едрева-Кардјиева, Р.;
dc.citation.volume297
dc.citation.issue1-2
dc.citation.spage54
dc.citation.epage62
dc.citation.other297(1-2): 54-62
dc.citation.rankM21
dc.identifier.doi10.1016/j.molcata.2008.09.004
dc.identifier.rcubConv_4173
dc.identifier.scopus2-s2.0-57149124628
dc.identifier.wos000262743800007
dc.type.versionpublishedVersion


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