Al/Fe-PILC catalyst: Bench-scale preparation and shaping as extrudates

摘要: Preparation of Al/Fe-pillared clays (Al/Fe-PILC) has been extensively studied along the past few years because their low-cost, microporous structure and high catalytic performance in environmental applications. However, scaling up preparation shaping without significant loss properties use to be a challenging issue [1]. Thus, this work focused intercalation/pillaring starting Colombian bentonite by Al/Fe-polycations at 2.0 Kg scale, followed cylindrical extrudates. The natural clay, mainly its Ca2+ cationic form, was interlayered ethanol-based concentrated suspension (50 % w/v) with polycationic Al/Fe precursor under following set conditions previously improved [2]: atomic metal ratio Fe (AMRFe) = 5.0 %; total concentration metals (TCM) 0.6 mol/L hydrolysis OH-/(Al+Fe) (HR) 1.6, 100 L reactor shaken air injection. aluminosilicate successfully as confirmed shifting d001 signal powder XRD pattern lower 2θ angle (expansion from 1.52 1.75 nm), increased content Al declined exchange capacity. In other hand, mixture for functional material extrudates made using Al/Fe-clay (prior calcination) active phase, raw binder water lubricant. Several mixtures different ratios phase/binder were assessed keeping constant amount required proper extrusion (normalized 38 %). Composition, plasticity, thermal treatment, mechanic resistance chemical stability where recorded key improve material. mechanical optimal calcination 500 °C irrespective phase/binder; besides, calcined exhibited higher capacity adsorption when increased. A mass 43/19/38 phase/binder/water found term both, (against leaching)