@article{
author = "Radonjić, Vojkan and Krstić, Jugoslav and Lončarević, Davor and Vukelić, Nikola and Jovanović, Dušan M.",
year = "2019",
abstract = "Use of broken honeycomb-like expanded perlite as support for magnesium modified nickel catalysts in process of partial hydrogenation of sunflower oil was studied. By the use of the precipitation-deposition method, two groups of precursors were synthesized: different Ni/SiO2 mole ratios with constant Mg/Ni mole ratio 0.1, and different Mg/Ni mole ratios with constant Ni/SiO2 mole ratio 0.25. Characterizations of precursors were done (scanning electron microscopy, diffuse reflectance UV–Vis, infrared spectroscopy, N2-physisorption, temperature programmed reduction (TPR) and He-pycnometry) to determine the material differences, considering the change in morphology, structure, texture and reducibility with overall Ni and Mg content. In addition, TPR and hydrogen chemisorption were performed in order to estimate the temperature reduction range of supported precursors and the dispersion degree of nickel in reduced precursors, respectively. The interaction between Ni2+ and perlite support was established. Different reducibility and dispersion were obtained as a function of Ni/SiO2 and Mg/Ni mole ratios. After the precursor’s reduction and paraffin oil impregnation, the obtained catalysts were tested in a sunflower oil hydrogenation reaction. Catalyst activity was monitored through the decrease of the refractive index and hydrogen consumption that gave the insight that the influence on catalyst activity represents the accessibility of triacylglycerols and not always the hydrogen determined dispersion degree, Proučavana je moguća upotreba ekspantiranog perlita, oblika lomljenog pčelinjeg saća,
kao nosača magnezijum modifikovanog niklenog katalizatora u procesu parcijalne hidrogenizacije suncokretovog ulja. Primenom precipitaciono-depozicione metode, sintetisane su dve grupe prekursora: različitog molskog odnosa Ni/SiO2 sa konstantnim Mg/Ni
molskim odnosom 0,1 i različitog Mg/Ni molskog odnosa sa konstantnim Ni/SiO2 molskim odnosom 0,25. Izvršena je karakterizacija prekursora (skenirajuća elektronska
mikroskopija, difuziona refleksiona ULj-Vid, infracrvena spektroskopija, N2-fizisorpcija,
temperaturski programirana redukcija - TPR i He-piknometrija) u cilju utvrđivanja razlika
u materijalu, uzimajući u obzir promene u morfologiji, strukturi, teksturi i reducibilnosti
ukupnog sadržaja Ni i Mg. Dodatno, TPR i hemisorpcija vodonika urađene su u cilju
procene opsega temperature redukcije prekursora i stepena disperzije nikla u redukovanim prekursorima. Utvrđeno je postojanje interakcija između Ni
2+ i perlitnog nosača, a
dokazana je za različite reducibilnosti i disperznosti kao funkcija Ni/SiO2 i Mg/Ni molskog odnosa. Nakon redukcije prekursora i impregnacije parafinskim uljem, dobijeni
katalizatori su testirani u reakciji hidrogenizacije suncokretovog ulja. Katalitička aktivnost je praćena padom indeksa refrakcije i potrošnjom vodonika. Utvrđeno je da na
katalitičku aktivnost dominantan uticaj ima dostupnost aktivnih Ni0 centara molekulima
triacilglicerola, a ne njihov stepen disperzije utvrđen vodonikom.",
publisher = "Belgrade : Association of the Chemical Engineers of Serbia AChE",
journal = "Chemical Industry & Chemical Engineering Quarterly",
title = "Mg-Ni na perlitnom nosaču kao hidrogenizacioni katalizator: uticaj sadržaja Mg i Ni, Mg-Ni supported on perlite as hydrogenation catalyst: Influence of Mg and Ni content",
volume = "25",
number = "2",
pages = "193-206",
doi = "10.2298/CICEQ181001032R"
}
