Gustavo García2026-03-222026-03-222010https://www.redalyc.org/articulo.oa?id=426339673007https://andeanlibrary.org/handle/123456789/57006Citaciones: 1"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 wereformed 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."esBoehmiteCalcinationHydrolysisCatalysisMaterials scienceSpecific surface areaChemical engineeringAdsorptionMineralogyPhysical chemistryarticle