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- W4238679074 abstract "<p>In here, we present the low-cost production of NaAlO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> catalysts, which exhibit high activity in the transesterification of methyl acetate with glycerol to obtain acetins. The catalyst preparation procedure is based on the spray drying of a colloidal boehmite suspension, supplemented with a sodium aluminate (NaAlO<sub>2</sub>) solution using a pilot scale spray drier. Upon subsequent calcination, we obtain spherical micro particles presenting a homogeneous dispersion of sodium aluminate and featuring high basicity. The NaAlO<sub>2</sub> loading has a marked impact on the basicity and textural properties of the final materials. These solids are found to be efficient heterogeneous base catalysts for the upgrading of glycerol (which is essentially a waste) to glycerol acetins (which are important bio-based fuel additives). With 100 mg of the catalyst loaded with 20 wt.% of NaAlO<sub>2</sub>, a conversion of 96 % is obtained after 4 h of reaction at 60 °C (10 mmol of glycerol + 100 mmol of methyl acetate). Importantly, the selectivity for triacetin is as high as 20 % (the rest being 50 % of diacetin and 30 % of monoacetin). The catalysts act strictly in a heterogeneous way and are recyclable.</p>" @default.
- W4238679074 created "2022-05-12" @default.
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- W4238679074 date "2020-02-10" @default.
- W4238679074 modified "2023-09-24" @default.
- W4238679074 title "Highly Basic Solid Catalyst Obtained by Spray Drying of a NaAlO2 and Boehmite Suspension for the Upgrading of Glycerol to Acetins" @default.
- W4238679074 doi "https://doi.org/10.26434/chemrxiv.11826771" @default.
- W4238679074 hasPublicationYear "2020" @default.
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