Partial Oxidation of Methane to Methanol and Formaldehyde over Molybdenum-Oxide-Based-Catalysts

氧化钼基催化剂将甲烷部分氧化为甲醇和甲醛

• 批准号: 8912247
• 负责人: Umit Ozkan
• 金额: $ 17.88万
• 依托单位: Ohio State University Research Foundation -DO NOT USE
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-08-01 至 1993-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8912247&HistoricalAwards=false
• 关键词: Partial; Oxidation; Methane; Methanol; Formaldehyde

The relationship between the structural and surface characteristics of catalysts based on molybdenum oxide and the selectivity of these catalysts in the partial oxidation of methane is investigated. Among the issues addressed are the nature of active sites, the effects of promoters, catalyst- support interactions, the role of lattice oxygen, and the participation of the gas-phase oxidant. Supported, unsupported, and promoted catalysts are prepared and characterized using laser Raman spectroscopy, X-ray diffraction, scanning electron microscopy with three- dimensional imaging, energy-dispersive X-ray analysis, X-ray photoelectron spectroscopy, steady-state kinetics, and transient response experiments. The role of lattice oxygen in the oxidation reaction is examined using in situ laser Raman spectroscopy in conjunction with isotopic labelling. Methane is readily available from natural gas or refinery effluents. Its direct partial oxidation to methanol or formaldehyde would offer major savings in both capital and operating costs over traditional methods of making these products. Molybdenum-oxide catalysts show promise for this conversion, but further study is needed to obtain a practical process.

研究了基于氧化钼的催化剂的结构和表面特性与这些催化剂在甲烷部分氧化中的选择性之间的关系。 解决的问题包括活性位点的性质、促进剂的作用、催化剂-载体相互作用、晶格氧的作用以及气相氧化剂的参与。使用激光拉曼光谱、X射线衍射、三维成像扫描电子显微镜、能量色散X射线分析、X射线光电子能谱、稳态动力学和瞬态响应实验来制备和表征负载型、非负载型和促进型催化剂。 使用原位激光拉曼光谱结合同位素标记来检查晶格氧在氧化反应中的作用。 甲烷很容易从天然气或炼油厂废水中获得。 与生产这些产品的传统方法相比，其直接部分氧化为甲醇或甲醛将大大节省资本和运营成本。 氧化钼催化剂显示出这种转化的前景，但需要进一步研究才能获得实用的工艺。