Vapor-Phase Hydrogenolysis of Glycerol to 1,2-Propanediol over Cu/Al2O3 Catalyst at Ambient Hydrogen Pressure
In this paper, we report that the hydrogenolysis of glycerol can be carried out at atmospheric pressure and low temperature with high selectivity to 1,2-propanediol (1,2-PDO) over reduced copper catalyst. The vapor-phase reaction was carried out over the copper-based catalysts supported on alumina a...
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2016
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08885885_v55_n9_p2527_Dieuzeide http://hdl.handle.net/20.500.12110/paper_08885885_v55_n9_p2527_Dieuzeide |
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paper:paper_08885885_v55_n9_p2527_Dieuzeide2023-06-08T15:47:00Z Vapor-Phase Hydrogenolysis of Glycerol to 1,2-Propanediol over Cu/Al2O3 Catalyst at Ambient Hydrogen Pressure Amadeo, Norma Elvira Alumina Atmospheric pressure Atmospheric structure Atmospheric temperature Atomic emission spectroscopy Atomic spectroscopy Catalysts Copper Glycerol Hydrogenolysis Hydrolysis Inductively coupled plasma Temperature Vapor phase epitaxy X ray diffraction Copper-based catalysts Effects of temperature Glycerol conversions Powder X-ray diffraction (pXRD) Structural characteristics Structure sensitive reactions Temperature-programmed reduction Vapor phase reactions Catalyst selectivity In this paper, we report that the hydrogenolysis of glycerol can be carried out at atmospheric pressure and low temperature with high selectivity to 1,2-propanediol (1,2-PDO) over reduced copper catalyst. The vapor-phase reaction was carried out over the copper-based catalysts supported on alumina at ambient pressure, and the effects of temperature, space time, and H2 molar fraction in the feed were analyzed. The textural and structural characteristics of the catalysts with increasing copper loading were determined by N2 sorptometry (BET), inductively coupled plasma-atomic spectroscopy (ICP-AES), powder X-ray diffraction (PXRD), temperature-programmed reduction (TPR), and N2O chemisorption (metallic area). On the basis of both characterization and activity results, it was possible to conclude that the hydrogenolysis of glycerol to 1,2-propanediol in vapor phase at atmospheric pressure over copper-based catalysts is a structure sensitive reaction. Activity results suggests that the most probable pathway for the glycerol conversion into 1,2-propanediol under the employed conditions is glycerol is dehydration to hydroxyacetone (acetol), followed by its hydrogenation into 1,2-propanediol. Complete glycerol conversion and a selectivity of 60% to 1,2-propanediol was achieved, using a catalyst with 15 wt % CuO at 200°C, H2 molar fraction of 61%, and atmospheric pressure. © 2016 American Chemical Society. Fil:Amadeo, N. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08885885_v55_n9_p2527_Dieuzeide http://hdl.handle.net/20.500.12110/paper_08885885_v55_n9_p2527_Dieuzeide |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Alumina Atmospheric pressure Atmospheric structure Atmospheric temperature Atomic emission spectroscopy Atomic spectroscopy Catalysts Copper Glycerol Hydrogenolysis Hydrolysis Inductively coupled plasma Temperature Vapor phase epitaxy X ray diffraction Copper-based catalysts Effects of temperature Glycerol conversions Powder X-ray diffraction (pXRD) Structural characteristics Structure sensitive reactions Temperature-programmed reduction Vapor phase reactions Catalyst selectivity |
| spellingShingle |
Alumina Atmospheric pressure Atmospheric structure Atmospheric temperature Atomic emission spectroscopy Atomic spectroscopy Catalysts Copper Glycerol Hydrogenolysis Hydrolysis Inductively coupled plasma Temperature Vapor phase epitaxy X ray diffraction Copper-based catalysts Effects of temperature Glycerol conversions Powder X-ray diffraction (pXRD) Structural characteristics Structure sensitive reactions Temperature-programmed reduction Vapor phase reactions Catalyst selectivity Amadeo, Norma Elvira Vapor-Phase Hydrogenolysis of Glycerol to 1,2-Propanediol over Cu/Al2O3 Catalyst at Ambient Hydrogen Pressure |
| topic_facet |
Alumina Atmospheric pressure Atmospheric structure Atmospheric temperature Atomic emission spectroscopy Atomic spectroscopy Catalysts Copper Glycerol Hydrogenolysis Hydrolysis Inductively coupled plasma Temperature Vapor phase epitaxy X ray diffraction Copper-based catalysts Effects of temperature Glycerol conversions Powder X-ray diffraction (pXRD) Structural characteristics Structure sensitive reactions Temperature-programmed reduction Vapor phase reactions Catalyst selectivity |
| description |
In this paper, we report that the hydrogenolysis of glycerol can be carried out at atmospheric pressure and low temperature with high selectivity to 1,2-propanediol (1,2-PDO) over reduced copper catalyst. The vapor-phase reaction was carried out over the copper-based catalysts supported on alumina at ambient pressure, and the effects of temperature, space time, and H2 molar fraction in the feed were analyzed. The textural and structural characteristics of the catalysts with increasing copper loading were determined by N2 sorptometry (BET), inductively coupled plasma-atomic spectroscopy (ICP-AES), powder X-ray diffraction (PXRD), temperature-programmed reduction (TPR), and N2O chemisorption (metallic area). On the basis of both characterization and activity results, it was possible to conclude that the hydrogenolysis of glycerol to 1,2-propanediol in vapor phase at atmospheric pressure over copper-based catalysts is a structure sensitive reaction. Activity results suggests that the most probable pathway for the glycerol conversion into 1,2-propanediol under the employed conditions is glycerol is dehydration to hydroxyacetone (acetol), followed by its hydrogenation into 1,2-propanediol. Complete glycerol conversion and a selectivity of 60% to 1,2-propanediol was achieved, using a catalyst with 15 wt % CuO at 200°C, H2 molar fraction of 61%, and atmospheric pressure. © 2016 American Chemical Society. |
| author |
Amadeo, Norma Elvira |
| author_facet |
Amadeo, Norma Elvira |
| author_sort |
Amadeo, Norma Elvira |
| title |
Vapor-Phase Hydrogenolysis of Glycerol to 1,2-Propanediol over Cu/Al2O3 Catalyst at Ambient Hydrogen Pressure |
| title_short |
Vapor-Phase Hydrogenolysis of Glycerol to 1,2-Propanediol over Cu/Al2O3 Catalyst at Ambient Hydrogen Pressure |
| title_full |
Vapor-Phase Hydrogenolysis of Glycerol to 1,2-Propanediol over Cu/Al2O3 Catalyst at Ambient Hydrogen Pressure |
| title_fullStr |
Vapor-Phase Hydrogenolysis of Glycerol to 1,2-Propanediol over Cu/Al2O3 Catalyst at Ambient Hydrogen Pressure |
| title_full_unstemmed |
Vapor-Phase Hydrogenolysis of Glycerol to 1,2-Propanediol over Cu/Al2O3 Catalyst at Ambient Hydrogen Pressure |
| title_sort |
vapor-phase hydrogenolysis of glycerol to 1,2-propanediol over cu/al2o3 catalyst at ambient hydrogen pressure |
| publishDate |
2016 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08885885_v55_n9_p2527_Dieuzeide http://hdl.handle.net/20.500.12110/paper_08885885_v55_n9_p2527_Dieuzeide |
| work_keys_str_mv |
AT amadeonormaelvira vaporphasehydrogenolysisofglycerolto12propanediolovercual2o3catalystatambienthydrogenpressure |
| _version_ |
1768546727978074112 |