Role of the Al source in the synthesis of aluminum magadiite
| Autor: | Dadong Li, Shuangqin Zeng, Hong Nie, Yannick Millot, Yunfei Bi, Jean-François Lambert, Sandra Casale, Juliette Blanchard |
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| Přispěvatelé: | Research Institute of Petroleum processing (RIPP), SINOPEC, Laboratoire de Réactivité de Surface (LRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Cumene
inorganic chemicals Materials science Inorganic chemistry chemistry.chemical_element 02 engineering and technology 010402 general chemistry 01 natural sciences complex mixtures Mordenite law.invention Lamellar silicates chemistry.chemical_compound Geochemistry and Petrology Aluminium law Lamellar structure Brønsted acidity Crystallization Sulfate 27Al NMR Geology [CHIM.CATA]Chemical Sciences/Catalysis 021001 nanoscience & nanotechnology Phyllosilicates Silicate 0104 chemical sciences 29Si NMR chemistry Hydroxide 0210 nano-technology |
| Zdroj: | Applied Clay Science Applied Clay Science, Elsevier, 2012, 57, pp.71-78. ⟨10.1016/j.clay.2012.01.005⟩ Applied Clay Science, 2012, 57, pp.71-78. ⟨10.1016/j.clay.2012.01.005⟩ |
| ISSN: | 0169-1317 |
| Popis: | International audience; The role of the aluminum source on the insertion of Al in the silicate layers during the hydrothermal crystallization of magadiite (NaSi7O13(OH),4H2O), a lamellar silicate, was investigated. Three aluminum sources were compared: aluminum isopropoxide, aluminum sulfate and aluminum hydroxide We observed that aluminum isopropoxide leads to the presence of mordenite impurities, aluminum sulfate to an only partial insertion of aluminum, whereas aluminum hydroxide allows preparing at 150 °C in 3 days, well crystallized Al-magadiite samples with Si/Al ratios of 20 or 40. Characterization by 29Si and 27Al NMR of the Al-magadiite samples obtained with aluminum hydroxide as Al source indicates that the samples retain the main characteristics of magadiite and all the aluminum atoms are in tetrahedral substitution in the silicate framework. The presence of acid sites is evidenced by the activities of these samples in cumene cracking, a model reaction for strong Brønsted acidity. |
| Databáze: | OpenAIRE |
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