INVESTIGADORES
MARCHETTI Sergio Gustavo
congresos y reuniones científicas
Título:
PROSPECTS OF FE/MCM-41 AS A CATALYST FOR HYDROCARBON SYNTHESIS
Autor/es:
M.V. CAGNOLI; NG. GALLEGOS; J.F. BENGOA; AM. ALVAREZ; S.M. MORENO; A. ROIG; SG. MARCHETTI; RC. MERCADER
Lugar:
Madrid
Reunión:
Simposio; International Symposium on the Industrial Applications of the Mössbauer Effect; 2004
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.