Demonstration of improved effectiveness factor of catalysts based on hollow single crystal zeolites

Céline Pagis (1, 2) , Frédéric Meunier (1) , Yves Schuurman (1) , Alain Tuel (1) , Mathias Dodin (2) , Raquel Martinez-Franco (2) , David Farrusseng (1)

1 IRCELYON - Institut de recherches sur la catalyse et l'environnement de Lyon
2 IFPEN - IFP Energies nouvelles

Pt/NaY zeolites with bulk and hollow morphologies have been used as model catalysts in the hydrogenation of cyclohexene as model reaction. In contrast to most hierarchical zeolites, the presence of a single internal cavity modifies only the mean diffusion length, without changing the external surface area and the crystal size. Differences in catalytic activities have been attributed to a shorter diffusion length in hollow crystals. The volume fraction of zeolite used in bulk crystals (ca. 0.63–0.70) matches well with the shell thickness in hollow crystals, leading to an efficiency factor value for the latter close to 1.

Keywords: Effectiveness Factor; Transport; Hollow zeolithes; Heteregenous catalysis; Kinetics

Domains: Chemical Sciences; Catalysis; Environmental Sciences; Environmental and Society

Céline Pagis, Frédéric Meunier, Yves Schuurman, Alain Tuel, Mathias Dodin, et al.. Demonstration of improved effectiveness factor of catalysts based on hollow single crystal zeolites. ChemCatChem, 2018, 10 (20), pp.4525-4529. ⟨10.1002/cctc.201801225⟩. ⟨hal-01980870⟩