Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, P R China.
ChemSusChem. 2010 Dec 17;3(12):1383-9. doi: 10.1002/cssc.201000245.
An embedded catalyst for the oxidative dehydration of glycerol, featuring iron oxide (FeO(x)) domains on the surface of an iron orthovanadate (FeVO₄) phase, is developed. Catalytic reactions are conducted in a fixed-bed reactor at 300 °C with a feed composition N₂/O₂/H₂O/glycerol=66.6:1.7:30.3:1.5. Catalytic results show that the catalyst exhibits a better performance than an FeO(x) catalyst prepared by impregnation and than a mixture of FeVO₄ and Fe₂O₃The best yield for acrylic acid was 14 %. The presence of FeO(x) domains on the surface of FeVO₄ catalyzes the oxidation of acrolein to acrylic acid. The catalysts are characterized by a range of techniques. The interaction between the nanometer-sized FeO(x) domains and the FeVO₄ phase is strong enough to stabilize the FeO(x) and retain its high activity. The proximity of the two phases provides an environment for the dehydration of glycerol and the oxidation of acrolein to acrylic acid.
开发了一种嵌入式催化剂，用于甘油的氧化脱水，其特征在于铁正钒酸盐（FeVO₄）相表面上的氧化铁（FeO(x)）域。在固定床反应器中，在 300°C 下，进料组成为 N₂/O₂/H₂O/甘油=66.6:1.7:30.3:1.5 进行催化反应。催化结果表明，该催化剂的性能优于浸渍法制备的 FeO(x)催化剂和 FeVO₄与 Fe₂O₃的混合物。丙烯酸的最佳收率为 14%。FeVO₄表面上的 FeO(x)域的存在催化丙烯醛氧化为丙烯酸。通过一系列技术对催化剂进行了表征。纳米级 FeO(x)域与 FeVO₄ 相之间的相互作用足以稳定 FeO(x)并保持其高活性。两相的接近为甘油的脱水和丙烯醛氧化为丙烯酸提供了环境。
