Mo-V-Nb多组元氧化物催化乳酸氧化脱氢反应制备丙酮酸

Oxidative Dehydrogenation of Lactic Acid to Pyruvic Acid Catalyzed by Mo-V-Nb Multi-component Oxides

丙酮酸是一种重要的有机合成和药物合成中间体,本文采用成本低廉的乳酸为原料,以Mo-V-Nb多组元氧化物为催化剂,在较低的反应温度下催化氧化脱氢合成了具有高附加值的丙酮酸。应用X射线衍射(XRD)和扫描电子显微镜(SEM)表征了Mo-V-Nb多组元氧化物的物相组成和微观结构,采用气相色谱质谱联用(GC-MS)分析了反应产物,研究了乳酸氧化脱氢可能的反应路径,并深入探讨了关键反应参数反应温度、氧气分压和质量空速对催化选择性和乳酸转化率的影响。

Pyruvic acid is an important intermediate used in the synthesis of organic and pharamacal products.In this article,highly valued pyruvic acid was synthesized via the oxidative dehydrogenation of low-cost lactic acid catalyzed by Mo-V-Nb multi-component oxides at a low temperature.The phase composition and morphology were investigated by X-ray diffraction （XRD） and scanning electron microscope （SEM） respectively.The reaction products were analyzed by gas chromatograph mass spectrometer （GC-MS） and plausible reaction pathway was proposed.The influence of reaction temperature,partial pressure of oxygen and space velocity on the conversion of lactic acid and selectivities of major products were investigated.