CENTRO DE INVESTIGACION Y DESARROLLO EN CIENCIAS APLICADAS "DR. JORGE J. RONCO"
Unidad Ejecutora - UE
FISCHER-TROPSCH SYNTHESIS. INFLUENCE OF THE CRYSTAL SIZE OF IRON ACTIVE SPECIES ON THE ACTIVITY AND SELECTIVITY.
L.A. CANO; M.V. CAGNOLI; N.A. FELLENZ; J.F. BENGOA; N.G. GALLEGOS; A.M. ALVAREZ; S.G. MARCHETTI
APPLIED CATALYSIS A-GENERAL
ELSEVIER SCIENCE BV
Año: 2010 vol. 379 p. 105 - 105
In order to analyze the influence of the crystal size of the active phase in the Fischer-Tropsch synthesis(FTS), two iron catalysts, supported on MCM-41 and SBA-15, were prepared by incipient wetness impregnationand tested in this reaction. The solids were characterized by atomic absorption spectroscopy, N2adsorption, X-ray diffraction at low angles and Mössbauer spectroscopy. The activated catalysts showedthe same iron species. However, the average crystal size of the active phase is about three times higherin SBA-15 than in MCM-41. Besides, both systems displayed a narrow size distribution. The catalyst withhigher crystal size (Fe/SBA-15) presented higher conversion, higher chain growth and lower CH4 production.These results would indicate that the FTS is a structure sensitive reaction in a sizes range within,approximately, 310 nm.