INVESTIGADORES
MORENO Mario Sergio Jesus
artículos
Título:
Prospects of Fe/MCM-41 as a Catalyst for Hydrocarbon Synthesis
Autor/es:
MARÍA V. CAGNOLI , NORMA G. GALLEGOS, JOSÉ F. BENGOA, ANA M. ALVAREZ, M. SERGIO J. MORENO, ANNA ROIG, SERGIO G. MARCHETTI AND ROBERTO C. MERCADER
Revista:
American Institute of Physics Conference Proceedings
Editorial:
American Institue of Physics
Referencias:
Año: 2005 vol. 765 p. 13 - 22
Resumen:
We report the synthesis of cylindrical nanoparticles of metallic Fe entirely included in MCM-41 pores. Their dimensions are approx.3 nm diameter and approx. 3.8 nm length. We show that a coherent analysis of the results yielded by the various techniques is essential to obtain a catalyst supported on an MCM-41 matrix of ≈ 3 nm average pore diameter, which is active and selective toward olefins. The solids were characterized by low-angle x-ray diffraction, high-resolution transmission electron microscopy, high-resolution scanning transmission electron microscopy equipped with a high-angle annular dark-field, CO chemisorption, volumetric oxidation, and Mössbauer spectroscopy (in controlled atmosphere for the reduced catalysts). Catalytic results in the Fischer-Tropsch synthesis, as well as some unexpected results –like the inhomogeneous pore filling and discontinuous Fe particles– are also discussed.≈ 3 nm average pore diameter, which is active and selective toward olefins. The solids were characterized by low-angle x-ray diffraction, high-resolution transmission electron microscopy, high-resolution scanning transmission electron microscopy equipped with a high-angle annular dark-field, CO chemisorption, volumetric oxidation, and Mössbauer spectroscopy (in controlled atmosphere for the reduced catalysts). Catalytic results in the Fischer-Tropsch synthesis, as well as some unexpected results –like the inhomogeneous pore filling and discontinuous Fe particles– are also discussed.