Synthesis and Catalytic Properties of Vanadium-Phosphorus- Silicon Oxides

钒磷硅氧化物的合成及催化性能

• 批准号: 9100130
• 负责人: Sankaran Sundaresan
• 金额: $ 12.35万
• 依托单位: Princeton University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-01-01 至 1995-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9100130&HistoricalAwards=false
• 关键词: Synthesis; Catalytic; Properties; Vanadium; Phosphorus

This is a study of the effects of catalyst preparation and treatment on the structure and reactivity of VPO (vanadium phosphorus oxide or "vanadium phosphate") catalysts for the partial oxidation of n-butane to maleic anhydride. The core strategy is the incorporation of silicon into the VPO system, influencing the morphology, redox potential, and acidity of the catalyst; silicon should stabilize the vanadyl pyrophosphate phases, considered beneficial for the desired catalytic effect. Catalyst materials prepared are characterized by X-ray diffraction, Fourier-transform photoacoustic spectroscopy, X-ray photoelectron spectroscopy, chemisorption, and kinetic measurements to establish structure, morphology, and activity. Also examined is the effect of water vapor on the acidity, activity, and selectivity of the catalysts. Maleic anhydride is an important industrial product as a chemical intermediate in the production of a number of important monomers, drugs, and pesticides. It is now made by catalytic oxidation of butane; the low cost of the feedstock makes this feasible despite the limited yield. The objective of this work is to identify the cause of the yield limitation; if it can be circumvented, the economic impact would be major.

本文研究了催化剂的制备和 VPO（钒）的结构和反应性的处理 磷氧化物或“磷酸钒”）催化剂 正丁烷部分氧化成马来酸酐。 核心 战略是将硅并入VPO系统， 影响的形态，氧化还原电位，和酸度 催化剂;硅应该稳定氧钒 焦磷酸盐相，被认为有利于所需的 催化作用 制备的催化剂材料为 通过X射线衍射、傅立叶变换 光声光谱，X射线光电子光谱， 化学吸附和动力学测量来建立 结构、形态和活性。 还审查了 水蒸气对酸性、活性和 催化剂的选择性。 马来酸酐是一种重要的工业产品， 在生产一些化学中间体， 重要的单体、药物和杀虫剂。 它现在由 丁烷催化氧化;原料成本低 尽管产量有限，但这是可行的。 客观 这项工作的目的是确定产量限制的原因; 如果能够规避，经济影响将是重大的。