Liquid-phase hydrogenation of sunflower oil over platinum and nickel catalysts: Effects on activity and stereoselectivity
This study presents the results of comparative hydrogenation of sunflower oil over a platinum catalyst supported on activated diatomite and an industrial nickel catalyst (Pricat-9910). Catalysts are characterized using physical methods, such as transmission electron microscopic, temperature programm...
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Results in Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2590123024002238 |
| _version_ | 1797247692226691072 |
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| author | Kainaubek Toshtay |
| author_facet | Kainaubek Toshtay |
| author_sort | Kainaubek Toshtay |
| collection | DOAJ |
| description | This study presents the results of comparative hydrogenation of sunflower oil over a platinum catalyst supported on activated diatomite and an industrial nickel catalyst (Pricat-9910). Catalysts are characterized using physical methods, such as transmission electron microscopic, temperature programmed hydrogen desorption, Brunauer–Emmett–Teller and inductively coupled plasma atomic emission spectrometry, enabling the determination of the size of catalyst particles, forms of adsorbed hydrogen, and specific surface area. Depending on the process conditions, hydrogenation reaction rates on platinum catalysts have been found to be 2–5 times higher than cis-trans isomerization reaction rates. Using a nickel catalyst, the hydrogenation and isomerization rates at low temperatures (110°C-130 °C) and 0.5 MPa pressure are almost similar, while, the hydrogenation rate is 1.4–1.8 times lower than the isomerization rate at high temperatures and pressures, leading to the formation of a large number of trans isomers. The difference in catalysts selectivity may be attributed the speciation and different adsorption energies of surface hydrogen, leading to the possibility of simultaneous hydrogenation of linoleic and oleic acids on the nickel catalyst. |
| first_indexed | 2024-03-07T14:28:11Z |
| format | Article |
| id | doaj.art-976fafb7371349389a1aac0be2562e0e |
| institution | Directory Open Access Journal |
| issn | 2590-1230 |
| language | English |
| last_indexed | 2024-04-24T20:02:44Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
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| series | Results in Engineering |
| spelling | doaj.art-976fafb7371349389a1aac0be2562e0e2024-03-24T07:01:22ZengElsevierResults in Engineering2590-12302024-03-0121101970Liquid-phase hydrogenation of sunflower oil over platinum and nickel catalysts: Effects on activity and stereoselectivityKainaubek Toshtay0Al-Farabi Kazakh National University, Faculty of Chemistry and Chemical Technology, Almaty, Al-Farabi Avenue 71, 050040, KazakhstanThis study presents the results of comparative hydrogenation of sunflower oil over a platinum catalyst supported on activated diatomite and an industrial nickel catalyst (Pricat-9910). Catalysts are characterized using physical methods, such as transmission electron microscopic, temperature programmed hydrogen desorption, Brunauer–Emmett–Teller and inductively coupled plasma atomic emission spectrometry, enabling the determination of the size of catalyst particles, forms of adsorbed hydrogen, and specific surface area. Depending on the process conditions, hydrogenation reaction rates on platinum catalysts have been found to be 2–5 times higher than cis-trans isomerization reaction rates. Using a nickel catalyst, the hydrogenation and isomerization rates at low temperatures (110°C-130 °C) and 0.5 MPa pressure are almost similar, while, the hydrogenation rate is 1.4–1.8 times lower than the isomerization rate at high temperatures and pressures, leading to the formation of a large number of trans isomers. The difference in catalysts selectivity may be attributed the speciation and different adsorption energies of surface hydrogen, leading to the possibility of simultaneous hydrogenation of linoleic and oleic acids on the nickel catalyst.http://www.sciencedirect.com/science/article/pii/S2590123024002238HydrogenationPt catalystNi catalystSelectivityOleic acidcis-trans isomerization |
| spellingShingle | Kainaubek Toshtay Liquid-phase hydrogenation of sunflower oil over platinum and nickel catalysts: Effects on activity and stereoselectivity Results in Engineering Hydrogenation Pt catalyst Ni catalyst Selectivity Oleic acid cis-trans isomerization |
| title | Liquid-phase hydrogenation of sunflower oil over platinum and nickel catalysts: Effects on activity and stereoselectivity |
| title_full | Liquid-phase hydrogenation of sunflower oil over platinum and nickel catalysts: Effects on activity and stereoselectivity |
| title_fullStr | Liquid-phase hydrogenation of sunflower oil over platinum and nickel catalysts: Effects on activity and stereoselectivity |
| title_full_unstemmed | Liquid-phase hydrogenation of sunflower oil over platinum and nickel catalysts: Effects on activity and stereoselectivity |
| title_short | Liquid-phase hydrogenation of sunflower oil over platinum and nickel catalysts: Effects on activity and stereoselectivity |
| title_sort | liquid phase hydrogenation of sunflower oil over platinum and nickel catalysts effects on activity and stereoselectivity |
| topic | Hydrogenation Pt catalyst Ni catalyst Selectivity Oleic acid cis-trans isomerization |
| url | http://www.sciencedirect.com/science/article/pii/S2590123024002238 |
| work_keys_str_mv | AT kainaubektoshtay liquidphasehydrogenationofsunfloweroiloverplatinumandnickelcatalystseffectsonactivityandstereoselectivity |