Introduction

Froment, Pascale

doi:10.4000/rives.4035

Cited by 1 publication

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“…Some approaches have been published on the development of nanosized zeolites (<100 nm) using microwave heating and ultrananosized zeolites (<20 nm). Yet, these methods often feature the inconvenience of low incorporation of Ti into the zeolite framework and low yields [3,5,6] . The achievement of bidimensional zeolites often requires the use of expensive organosilanes [7] .…”

Section: Introductionmentioning

confidence: 99%

Hierarchical TS‐1 Through Ammonium Fluoride Etching

et al. 2022

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The impact of the NH 4 F etching on the textural and catalytic properties of TS-1 was investigated. Two TS-1 with different crystal sizes, i. e. 200 and 100 nm; were achieved, with different textural properties as inferred from nitrogen physisorption isotherms at 77 K, mercury porosimetry, powder X-ray diffraction patterns and transmission electron microscopy. The generation of larger mesopores within the parent samples was observed together with a reduction of the coherent crystal size (CCS) upon NH 4 F etching. The generation of secondary porosity further did not result in an alteration of the Si/Ti ratio, allowing to compare the catalytic outcomes of the samples as a function of the textural properties. It was found that the methyl-phenyl sulfide (MPS) conversion kinetics importantly depend on the textural properties of the catalysts. The initial velocity was found to increase linearly with the reduction of the CCS until reaching a plateau, indicating that diffusion limitation occur up to a CCS of approximately 100 nm. Likewise, mono-and dioxidation product selectivity was governed by diffusion issues.

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Section: Introductionmentioning

confidence: 99%