The diffusion of molecules inside porous materials with bidisperse pore structures

Measurement of Pore Diffusivity in NiMo/Al2O3 Catalyst Pellets by the Zero-Length Column Method

“…The materials used in this work were alumina-support catalyst pellets with a meso/macroporous structure. To validate the applicability of the ZLC technique for the samples, a ZLC measurement with benzene as the probe molecule had been carried on SiO 2 spheres of 50 nm uniform size, which were synthesized by the method described elsewhere . The scanning electron microscopy of the SiO 2 spheres is shown in the Supporting Information (Figure S2).…”

“…To validate the applicability of the ZLC technique for the samples, a ZLC measurement with benzene as the probe molecule had been carried on SiO 2 spheres of 50 nm uniform size, which were synthesized by the method described elsewhere. 44 The scanning electron microscopy of the SiO 2 spheres is shown in the Supporting Information (Figure S2). The experimental conditions were similar to those performed on aluminasupport catalysts, and the desorption curves were analyzed by the same method described in Section 3.2.…”