Selective Catalytic Oxidation of Glycerol to Dihydroxyacetone by CuO-CeO2 Mesoporous Composite Oxide Supported Au Catalyst
KE Yihu1, YU Xiaomei1, WANG Xue1, XU Huanhuan1, CAO Xinyi2, ZHU Yuqing2, WANG Fei2
1. School of Chemistry and Chemical Engineering, State Ethnic Affairs Commission, Ningxia Key Laboratory of Solar Chemical Conversion Technology, North Minzu University, Yinchuan 750021, China；
2. School of Petrochemical Engineering, Jiangsu Province Key Laboratory of Fine Petrochemical Engineering, Changzhou University, Changzhou 213164, China
Abstract：A series of CuO-CeO2 mesoporous composite oxides with different molar ratios of Cu to Ce (Cu/Ce ratio) were prepared using SBA-15 as a hard template. Then supported Au catalysts were prepared by deposition-precipitation. These catalysts were tested for the selective catalytic oxidation of glycerol to 1,3-dihydroxyacetone (DHA) in base-free conditions. Surface characterization using X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), temperature-programmed reduction of H2 (H2-TPR), and temperature-programmed desorption of CO2 (CO2-TPD). The results showed that under different Cu/Ce ratios, the support structure changed significantly, leading to differences in the interaction between the active component Au and the support and between Cu and Ce in the catalyst, so the catalysts showed different catalytic activities. When the Cu/Ce ratio was 5:1, the Au/CuO-CeO2 catalyst showed a better catalytic performance. Under the conditions of reaction temperature of 80 ℃, initial oxygen pressure of 1 MPa, and reaction time of 2 h, the conversion rate of glycerol was 80.3%, and the selectivity of DHA was 89.7%.
KE Yihu1,YU Xiaomei1,WANG Xue1 et al. Selective Catalytic Oxidation of Glycerol to Dihydroxyacetone by CuO-CeO2 Mesoporous Composite Oxide Supported Au Catalyst[J]. Chemical Reaction Engineering and Technology, 2022, 38(6): 491-501.
