Please use this identifier to cite or link to this item:
Title: Epoxidation of soybean oil over titanium or niobium incorporated SBA-15 and sulfated lanthanum titania silicate catalysts
Authors: Kalkandelen, Mustafa
Yılmaz, Selahattin
Keywords: FAME mixture epoxidation
Mesoporous catalysts
Solid acid catalysts
Sulfated lanthanum titania silicate
Soybean oil epoxidation
Publisher: Elsevier
Abstract: Mesoporous heterogeneous catalysts were synthesized to develop environmentally benign catalysts for soybean oil's (Glycine max) epoxidation. The investigated materials were sulfated lanthanum doped titania silica xerogel (SO4/La-TiO2-SiO2), and Ti and Nb incorporated SBA-15 with two different silica/metal molar ratios of 10 and 20. Soybean oil epoxidation reactions were performed in tert-butanol by utilizing H2O2 as oxidant at 75 °C for 6 h. Product analysis was carried out by H NMR, FTIR, and analytical methods. Nb-SBA-15 catalysts yielded better conversion than Ti-SBA-15 catalysts owing to their high acidity. However, epoxide selectivity was found low for both catalyst groups due to water in the medium that promoted side reactions. Tert-butanol and ethyl acetate were studied as solvents, but employing ethyl acetate in the reactions triggered catalysts aggregation and deposition on the reactor surface. Stability tests indicated the robustness of Ti and Nb against leaching, whereas sulfur leaching was noted with SO4/La-TiO2-SiO2 catalyst. The most active Nb-SBA-15 (10) catalyst was also applied in the epoxidation of soybean-derived fatty acid methyl esters (FAME). The results showed that small-sized FAME molecules did not enhance the reaction rate. Reusability tests indicated that Nb-SBA-15 (10) was active in epoxidation for at least three cycles.
Appears in Collections:Chemical Engineering / Kimya Mühendisliği
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File Description SizeFormat 
  Until 2025-01-01
Article (Makale)10.58 MBAdobe PDFView/Open    Request a copy
Show full item record

CORE Recommender


checked on Jun 7, 2024


checked on Mar 23, 2024

Page view(s)

checked on Jun 10, 2024

Google ScholarTM



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