Base Catalysts Derived from Hydrocalumite for the Transesterification of Sunflower Oil
| Autor: | José Santamaría-González, Josefa Mérida-Robles, Antonio Jiménez-López, Sebastian Bruque-Gamez, Ramón Moreno-Tost, María José Campos-Molina, Pedro Maireles-Torres, Mônica C. G. Albuquerque, Enrique Rodríguez-Castellón |
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| Rok vydání: | 2009 |
| Předmět: |
chemistry.chemical_classification
food.ingredient Base (chemistry) General Chemical Engineering Sunflower oil Energy Engineering and Power Technology Transesterification Catalysis chemistry.chemical_compound Fuel Technology food chemistry Molar ratio Activation temperature Organic chemistry Hydroxide Methanol Nuclear chemistry |
| Zdroj: | Energy & Fuels. 24:979-984 |
| ISSN: | 1520-5029 0887-0624 |
| Popis: | This work investigates the use of a layered Ca−Al double hydroxide (hydrocalumite) as precursor, after its thermal activation, of base catalysts for the methanolysis of sunflower oil. Above 750 °C, hydrocalumite is transformed into a mixture of CaO and mayenite (Ca12Al14O33). Another Ca−Al material obtained under similar experimental conditions was also studied, but using the Ca/Al molar ratio of the mayenite, 12:14. A sunflower oil conversion of 97% has been reached with a methanol/oil molar ratio of 12:1, a reaction temperature of 60 °C, and 1 wt % of the CaAl-2:1 catalyst. This catalyst needs to be previously activated at 500 °C in helium atmosphere, which is an activation temperature at least 200 °C lower than that required to revert the CO2 poisoning in bulk and supported CaO catalysts. |
| Databáze: | OpenAIRE |
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