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Pure silica Beta zeolite supported copper species for efficient hydrogenolysis of glycerol to 1,2-propanediol.
- Source :
-
Biomass & Bioenergy . Jul2023, Vol. 174, pN.PAG-N.PAG. 1p. - Publication Year :
- 2023
-
Abstract
- Catalytic conversion of glycerol to 1,2-propanediol is an important issue for sustainable production of fine chemicals and biodiesel. Here it is found that pure silica Beta zeolite supported copper species via hydrothermal treatment (Cu/Si-Beta-HT) are highly efficient for hydrogenolysis of glycerol to 1,2-propanediol, achieving 96.0% conversion and more than 99.9% selectivity after reaction at 240 °C for 3 h. TEM images and N 2 O titration experiments confirm the high dispersion of Cu nanoparticles in the catalyst. In addition, pyridine-adsorption FT-IR spectra and NH 3 -TPD profiles suggest the presence of copper species as Lewis acidic sites in the catalyst. The hydrogenolysis of glycerol to 1,2-propanediol mainly includes the dehydration of glycerol to acetol and hydrogenation of acetol into 1,2-propanediol, which are catalyzed by copper cations and Cu nanoparticles, respectively. In situ FT-IR spectra and kinetic studies suggest that the dehydration rate is slower than the hydrogenation rate, and the dehydration is a key step for the hydrogenolysis of glycerol to 1,2-propanediol. [Display omitted] • Cu nanoparticles with rich copper cation on pure silica Beta zeolite were prepared. • The copper cation sites are resulted from Cu–O–Si–O (cupric silicate) species. • This catalyst is highly active for hydrogenolysis of glycerol to 1,2-propanediol. • Kinetic studies confirm that the glycerol dehydration is a key step. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09619534
- Volume :
- 174
- Database :
- Academic Search Index
- Journal :
- Biomass & Bioenergy
- Publication Type :
- Academic Journal
- Accession number :
- 164256342
- Full Text :
- https://doi.org/10.1016/j.biombioe.2023.106818