【摘要】 用H2-TPR方法研究了过渡金属离子及其含量对杂多酸-HxPAs0.2Mo10VOy的氧化性能的影响,并在固定床反应器上考察了M0.2HxPAs0.2Mo10VOy(M=Fe3+、Co2+、N i2+和Cu2+)催化剂对异丁烷选择性氧化的催化性能.研究结果表明用过渡金属离子取代杂多酸中的质子,可以在较大程度上增强杂多酸的低温氧化能力,其中Fe3+对增强杂多酸的催化活性最为明显,而Cu2+却有利于提高目的产物甲基丙烯酸的选择性.更多还原

【Abstract】 The effects of transition metal cations(M = Fe³⁺、 Co²⁺、 Ni²⁺andCu²⁺)on the ability of catclytic oxidation of the H_xPAs_0.2Mo₁₀VO_y heteropoly acid were studied by H₂-TPR method.The catalytic performance of the M_0.2H_xPAs_0.2Mo₁₀VO_y heteropoly acid for selective oxidation of isobutane were also tested in a continuous flow fixed-bed reactor.The results showed that the replace of H⁺ of heteropoly acid by metal cations can greatly increased the ability of catclytic oxidation of the heteropoly acid.Among these metal cations,Fe³⁺ can markedly improve the activity of the heteropoly acid,but Cu²⁺ increased the selectivity of acrylic acid.更多还原