Volumes 108–109, 11 October 2011, Pages 161–167
Niobium-containing MCM-41 silica catalysts for biodiesel production
Cristina García-Sancho, Ramón Moreno-Tost, Josefa M. Mérida-Robles, José Santamaría-González, Antonio Jiménez-López, Pedro Maireles-Torres ,
Departamento de Química Inorgánica, Cristalografía y Mineralogía (Unidad Asociada al ICP-CSIC), Facultad de Ciencias, Universidad de Málaga, Campus de Teatinos s/n, 29071 Málaga, Spain
Received 19 April 2011, Revised 8 August 2011, Accepted 18 August 2011, Available online 25 August 2011
Choose an option to locate/access this article:
Check if you have access through your login credentials or your institution
Check access
Purchase $41.95
DOI: 10.1016/j.apcatb.2011.08.025
Get rights and content
Abstract
This research focuses on the synthesis and characterization of mesoporous niobosilicate molecular sieves and their catalytic activity in biodiesel production by transesterification of sunflower oil with methanol. Catalysts were prepared by two procedures: impregnation of a MCM-41 silica with different amounts of niobium oxalate and subsequent calcination, and structural incorporation of Nb into a MCM-41 silica during the synthesis step. Characterization techniques such as XRD, XPS, TEM, NH3-TPD and N2 sorption have been employed to characterize the synthesized catalysts. The biodiesel yield increases with the catalyst acidity, attaining a value of 95% with a 7.5 wt% of a MCM-41 silica impregnated with a 8% of Nb2O5, at 200 °C, after 4 h of reaction and a methanol/oil molar ratio of 12. The potential of this family of catalysts to treat low-grade oils has been demonstrated by increasing the acidity of the sunflower oil by adding oleic acid (1.1 wt%) and water (0.2 wt%) to the reaction mixture, since the biodiesel yield is maintained close to 80%. Moreover, the catalyst reutilization has been demonstrated during five catalytic runs by employing a low-grade oil, with no leaching of the active phase.
Graphical abstract
Niobium-containing MCM-41silica catalysts are very active in the methanolysis of sunflower oil at 200 °C, even in the presence of an acidity of 1.1 wt% and 0.2 wt% water, without leaching.
Highlights
Nb2O5 containing mesoporous silica is active for the acid-catalyzed biodiesel production. The catalysts can be reutilized, without leaching of the active phase. They catalyze the methanolysis of triglycerides, even in the presence of water and FFA.
KeywordsNiobium oxide; Mesoporous silica; Biodiesel; Transesterification; Acid catalysis
Corresponding author. Tel.: +34 952137534; fax: +34 952131870.
Copyright © 2011 Elsevier B.V. All rights reserved.
http://www.sciencedirect.com/science/article/pii/S0926337311003948
Recent CMC News
- CMC Announces Fourth Quarter Fiscal 2024 Conference Call Webcast Details • PR Newswire (US) • 09/17/2024 08:15:00 PM
- Form 4 - Statement of changes in beneficial ownership of securities • Edgar (US Regulatory) • 09/04/2024 08:04:30 PM
- Form 3 - Initial statement of beneficial ownership of securities • Edgar (US Regulatory) • 09/03/2024 06:21:33 PM
- CMC Awarded on TIME's America's Best Mid-Size Companies 2024 List • PR Newswire (US) • 08/22/2024 08:48:00 PM
- "Decoded": Groundbreaking Chinese Psychological Thriller Film Set for Global Release on August 22 • PR Newswire (Canada) • 08/05/2024 08:07:00 AM
- "Decoded": Groundbreaking Chinese Psychological Thriller Film Set for Global Release on August 22 • PR Newswire (US) • 08/05/2024 08:07:00 AM
- Form 8-K - Current report • Edgar (US Regulatory) • 08/02/2024 12:15:30 PM
- CMC Announces Executive and Board Leadership Changes • PR Newswire (US) • 08/02/2024 11:30:00 AM
- Form 4 - Statement of changes in beneficial ownership of securities • Edgar (US Regulatory) • 07/18/2024 05:32:55 PM
- Form 4 - Statement of changes in beneficial ownership of securities • Edgar (US Regulatory) • 07/12/2024 03:09:10 PM
- Form 4 - Statement of changes in beneficial ownership of securities • Edgar (US Regulatory) • 07/12/2024 03:07:24 PM
- Form 4 - Statement of changes in beneficial ownership of securities • Edgar (US Regulatory) • 07/12/2024 03:04:48 PM
- Form 8-K - Current report • Edgar (US Regulatory) • 06/20/2024 11:49:50 AM
- Form 8-K - Current report • Edgar (US Regulatory) • 06/20/2024 11:22:35 AM
- U.S. Index Futures Surge; Oil Prices Increase • IH Market News • 06/20/2024 10:56:57 AM
- CMC REPORTS THIRD QUARTER FISCAL 2024 RESULTS • PR Newswire (US) • 06/20/2024 10:45:00 AM
- CMC Announces Quarterly Dividend of $0.18 Per Share • PR Newswire (US) • 06/19/2024 12:32:00 PM
- CO-OPERATORS ANNONCE LES LAURÉATS ET LAURÉATES DU PRIX DES JEUNES LEADERS 2024 • PR Newswire (Canada) • 06/11/2024 11:00:00 AM
- CMC Awarded on the USA TODAY America's Best Climate Leaders 2024 List • PR Newswire (US) • 05/30/2024 08:15:00 PM
- Form SD - Specialized disclosure report • Edgar (US Regulatory) • 05/24/2024 12:00:28 PM
- CMC Announces Third Quarter Fiscal 2024 Conference Call Webcast Details • PR Newswire (US) • 05/20/2024 08:15:00 PM
- CMC Reports Second Quarter Fiscal 2024 Results • PR Newswire (US) • 03/21/2024 10:45:00 AM
- CMC Announces a 13% Increase In Quarterly Dividend • PR Newswire (US) • 03/20/2024 12:48:00 PM
- Form 4 - Statement of changes in beneficial ownership of securities • Edgar (US Regulatory) • 02/29/2024 03:27:12 PM
- CMC Announces Second Quarter Fiscal 2024 Conference Call Webcast Details • PR Newswire (US) • 02/21/2024 09:15:00 PM
VHAI - Vocodia Partners with Leading Political Super PACs to Revolutionize Fundraising Efforts • VHAI • Sep 19, 2024 11:48 AM
Dear Cashmere Group Holding Co. AKA Swifty Global Signs Binding Letter of Intent to be Acquired by Signing Day Sports • DRCR • Sep 19, 2024 10:26 AM
HealthLynked Launches Virtual Urgent Care Through Partnership with Lyric Health. • HLYK • Sep 19, 2024 8:00 AM
Element79 Gold Corp. Appoints Kevin Arias as Advisor to the Board of Directors, Strengthening Strategic Leadership • ELMGF • Sep 18, 2024 10:29 AM
Mawson Finland Limited Further Expands the Known Mineralized Zones at Rajapalot: Palokas step-out drills 7 metres @ 9.1 g/t gold & 706 ppm cobalt • MFL • Sep 17, 2024 9:02 AM
PickleJar Announces Integration With OptCulture to Deliver Holistic Fan Experiences at Venue Point of Sale • PKLE • Sep 17, 2024 8:00 AM