Resumen

GARCIAª, Gustavo; FALCO B, Marisa; SEDRAN B, Ulises  y  CABRERA A,C, Saúl. ALUMINAS MESOPOROSAS OBTENIDAS POR LA RUTA DE LOS ATRANOS PARA SU APLICACIÓN COMO MATRICES EN  CRAQUEO CATALITICO. Rev. Bol. Quim [online]. 2010, vol.27, n.1, pp.41-49. ISSN 0250-5460.

ABSTRACT The atrane route was used to synthesize aluminas that showed specific surface areas in the 150 - 275 m²/g range and average pore sizes in the 60 - 180 Å range after calcination. Different techniques were used to characterize the aluminas (IR, XRD, 27Al MAS-NMR, N2 adsorption). Crystalline micro domains of AlOOH boehmite type were formed in the uncalcined samples that increased their size as a function of the proportion of water in the synthesis, because water favors the hydrolysis and condensation of the Al[N(CH2-CH2-O)3]2H3 complex. The calcination treatment induced the crystalline restructuration from boehmite-type to γ - alumina-type structures. The activities of the aluminas prepared by the atrane route, as indicated by the TIPB conversion at 500 °C and short reaction times from 12 to 30 s, were somewhat smaller than those observed in conventional aluminas. The apparent kinetic parameters in a simple, first order model were similar, suggesting that accessibility limitations from the pore systems were not present. The properties shown by these aluminas synthesized by the atrane route indicated a preliminary appropriate condition for being used as FCC catalyst matrices. Corresponding author: gustavogarcia@correo.umsa.bo

Palabras clave : Ruta de los atranos; mesoporosos; craqueo catalítico.

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