A highly active dispersed copper oxide phase on calcined MgAlGaO catalysts in glycerol hydrogenolysis
| Autor: | Jyothi Sunkari, Putrakumar Balla, Harisekhar Mitta, Nagaraju Devunuri, Suresh Mutyala, Vijayanand Perupogu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Copper oxide
Materials science chemistry.chemical_element 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Copper Catalysis 0104 chemical sciences chemistry.chemical_compound Adsorption chemistry Chemical engineering Hydrogenolysis Desorption Temperature-programmed reduction 0210 nano-technology Space velocity |
| Zdroj: | Catalysis Today. 375:204-215 |
| ISSN: | 0920-5861 |
| Popis: | Utilization of biomass into liquid fuels and chemicals will be reduce the dependency on fossil-based resources and CO2 emissions. In this work, we report a series of copper (loadings 5−20 wt.%) supported on calcined Mg9Al2.7-Ga2.3O2 (Ga2.3-HT) catalysts were prepared by a wetness impregnation method and their catalytic performance was investigated for the production of 1,2-propanediol from glycerol in a vapor phase. The physicochemical properties of the these catalysts were characterized by X-ray diffraction (XRD), N2 adsorption (BET), Transmission electron microscopy (TEM), Scanning electron microscopy (SEM), Elemental mapping, UV–vis diffused reflectance spectroscopy (UV-DRS), CO2-Temperature programmed desorption (CO2-TPD), N2O chemisorption and temperature programmed reduction (TPR) analysis. These results demonstrated that Ga promotional effects observed to be significant over the Ga2.3-HT support and that influenced the final Cu based catalysts. Moreover, Cu functioning is found to be a vital role for achieved high catalytic activity in glycerol hydrogenolysis. Lower Cu loading is a more active and selective to the 1,2-PrDs production due to highly dispersed particles, and distributed homogeneously along with enough number of basic sites and acido-basic sites. The catalytic activity of calcined 5CuO/Ga2.3-HT was systematically investigated under varying reaction parameters including copper loading, various Mg/Al/Ga ratios, reaction temperature, hydrogen flow rate, glycerol concentration and weight hourly space velocity to derive the optimum conditions for the reaction. The catalyst stability, reusability and structure-activity correlation were also elucidated. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect