Vu, Hue-Tong, Harth, Florian Maximilian, Goepel, Michael, Linares, Noemi, Garcia-Martinez, Javier, Gläser, Roger
Enhanced activity of a bifunctional Pt/zeolite Y catalyst with an intracrystalline hierarchical pore system in the aqueous-phase hydrogenation of levulinic acid
Chemical Engineering Journal. 2022, 430(Part 2): 132763. https://doi.org/10.1016/j.cej.2021.132763
URI: http://hdl.handle.net/10045/118989
DOI: 10.1016/j.cej.2021.132763
ISSN: 1385-8947 (Print)
Abstract: 
Mesopores in the range of 4 to 5 nm were introduced into zeolite Y (nSi/nAl = 16) by surfactant-templating. This method using a mixture of octadecyltrimethylammonium hydroxide and bromide (C18TAOH/C18TABr) yields a mesoporous zeolite (Y–C18TAOH) with a higher specific mesopore volume and only a small loss in crystallinity and specific micropore volume. After loading with Pt, the two bifunctional catalysts (2.7Pt/Y and 2.6Pt/Y–C18TAOH) were applied in the aqueous-phase hydrogenation of levulinic acid (LA) to γ–valerolactone (GVL) (pH2 = 2.5 MPa, 393 K). Intraparticle mass–transfer limitations present for the catalyst 2.7Pt/Y were not observed in the LA hydrogenation over the catalyst with the hierarchical pore system 2.6Pt/Y–C18TAOH. Changes in the acid and de-/hydrogenation functionality are shown not to be responsible for the high catalytic activity of 2.6Pt/Y–C18TAOH. The presence of additional mesopores in a bifunctional catalyst based on zeolite Y is proven to enhance the mass-transfer properties and the resulting catalytic activity in the aqueous-phase hydrogenation of LA for the first time.
Keywords:Zeolite Y, Bifunctional catalyst, Biomass conversion, Surfactant-templating, Aqueous-phase hydrogenation, Levulinic acid
Elsevier
info:eu-repo/semantics/article