On the surface basic properties of sulfated magnesia-silica sol-gel mixed oxides
Por:
López T., Gómez R., Llanos M.E., García-Figueroa E., Navarrete J., López-Salinas E.
Publicada:
1 ene 1999
Resumen:
The morphology and surface base properties of a family of sulfated MgO-SiO2 mixed oxides prepared by the sol-gel method were studied. Morphological features of the sulfated system are found to vary with preparative conditions. Electron dispersive spectroscopy (EDS) analysis of the samples show a very high homogeneous distribution of sulfur and magnesium on the surface. It was found by CO2-Thermal programmed desorption (CO2-TPD) study that the basic site number, strength and density depend on the relative concentration of magnesium and sulfation. Fourier Transform Infrared (FTIR) spectroscopy of CDCl3 yield complementary information on the nature and heterogeneity of surface basic centers. Aldolic condensation of acetone was performed as a test reaction for basicity characterization.
Filiaciones:
López T.:
Department of Chemistry, Univ. Auton. M., Mexico, Mexico
Gómez R.:
Department of Chemistry, Univ. Auton. M., Mexico, Mexico
Llanos M.E.:
Inst. Mexicano del Petróleo, SGTI, P.O. Box 14-805, D.F. 07730, México, Mexico
García-Figueroa E.:
Inst. Mexicano del Petróleo, SGTI, P.O. Box 14-805, D.F. 07730, México, Mexico
Navarrete J.:
Inst. Mexicano del Petróleo, SGTI, P.O. Box 14-805, D.F. 07730, México, Mexico
López-Salinas E.:
Inst. Mexicano del Petróleo, SGTI, P.O. Box 14-805, D.F. 07730, México, Mexico
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