Cu nanoparticles supported on a variety of oxide supports, including SiO2, TiO2, ZrO2, Al2O3, MgO and ZnO, were investigated for the hydrogenolysis of biomass‐derived furfuryl alcohol to1,2‐pentanediol and 1,5‐pent...Cu nanoparticles supported on a variety of oxide supports, including SiO2, TiO2, ZrO2, Al2O3, MgO and ZnO, were investigated for the hydrogenolysis of biomass‐derived furfuryl alcohol to1,2‐pentanediol and 1,5‐pentanediol. A Cu‐Al2O3 catalyst with 10 wt% Cu loading prepared by a co‐precipitation method exhibited the best performance in terms of producing pentanediols compared with the other materials. This catalyst generated an 85.8% conversion and a 70.3% combined selectivity for the target pentanediols at 413 K and 8 MPa H2 over an 8‐h reaction. The catalyst could also be recycled over repeated reaction trials without any significant decrease in productivity. Characterizations with X‐ray diffraction, NH3/CO2‐temperature programmed desorption, N2 adsorption,transmission electron microscopy and N2 O chemisorption demonstrated that intimate and effective interactions between Cu particles and the acidic Al2O3 support in this material greatly enhanced its activity and selectivity. The promotion of the hydrogenolysis reaction was found to be especially sensitive to the Cu particle size, and the catalyst with Cu particles 1.9 to 2.4 nm in size showed the highest turnover frequency during the synthesis of pentanediols.展开更多
A kind of sepiolite-supported copper-based catalyst by impregnation method using Cu（NO3）2 aqueous solution is prepared. In this paper, the activity of Cu/Sep for hydrogenation of furfural to furfuryl alcohol at atmo...A kind of sepiolite-supported copper-based catalyst by impregnation method using Cu（NO3）2 aqueous solution is prepared. In this paper, the activity of Cu/Sep for hydrogenation of furfural to furfuryl alcohol at atmospheric pressure has been studied in a pulse type reactor. The effects of Cu content, reaction temperature, inject amount were examined. The catalysts was characterized by TPR. The result revealed that Cu/Sep demonstrated good catalytic performance. Under the experimental conditions （135 ℃, Cu loading 18.1% and normal pressure ）, the conversion of furfural and selectivity of furfuryl alcohol are all 100%. The result of TPR indicated that Cu dispersion decreased with the increase of Cu load.展开更多
基金supported by the National Natural Science Foundation of China(2113301121203221+1 种基金21473224)the Natural Science Foundation of Gansu Province(1308RJZA281)~~
文摘Cu nanoparticles supported on a variety of oxide supports, including SiO2, TiO2, ZrO2, Al2O3, MgO and ZnO, were investigated for the hydrogenolysis of biomass‐derived furfuryl alcohol to1,2‐pentanediol and 1,5‐pentanediol. A Cu‐Al2O3 catalyst with 10 wt% Cu loading prepared by a co‐precipitation method exhibited the best performance in terms of producing pentanediols compared with the other materials. This catalyst generated an 85.8% conversion and a 70.3% combined selectivity for the target pentanediols at 413 K and 8 MPa H2 over an 8‐h reaction. The catalyst could also be recycled over repeated reaction trials without any significant decrease in productivity. Characterizations with X‐ray diffraction, NH3/CO2‐temperature programmed desorption, N2 adsorption,transmission electron microscopy and N2 O chemisorption demonstrated that intimate and effective interactions between Cu particles and the acidic Al2O3 support in this material greatly enhanced its activity and selectivity. The promotion of the hydrogenolysis reaction was found to be especially sensitive to the Cu particle size, and the catalyst with Cu particles 1.9 to 2.4 nm in size showed the highest turnover frequency during the synthesis of pentanediols.
文摘A kind of sepiolite-supported copper-based catalyst by impregnation method using Cu（NO3）2 aqueous solution is prepared. In this paper, the activity of Cu/Sep for hydrogenation of furfural to furfuryl alcohol at atmospheric pressure has been studied in a pulse type reactor. The effects of Cu content, reaction temperature, inject amount were examined. The catalysts was characterized by TPR. The result revealed that Cu/Sep demonstrated good catalytic performance. Under the experimental conditions （135 ℃, Cu loading 18.1% and normal pressure ）, the conversion of furfural and selectivity of furfuryl alcohol are all 100%. The result of TPR indicated that Cu dispersion decreased with the increase of Cu load.
