Selectivity of Partial Oxidation Reactions and Reactors

部分氧化反应和反应器的选择性

• 批准号: 9311295
• 负责人: Lanny Schmidt
• 金额: $ 29.22万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-09-15 至 1997-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9311295&HistoricalAwards=false
• 关键词: Selectivity; Partial; Oxidation; Reactions; Reactors

Abstract - Schmidt Oxidation reactions are difficult to manage because in most situations they exhibit a complex interplay between surface reactions, mass transfer, heat transfer, and homogeneous reaction. These factors produce complicated experimental behavior in terms of temperature variations across the reactor, flow patterns, multiple steady states, and reaction selectivity. It has been estimated that one-half of all industrial catalytic processes are oxidation reaction which are difficult to characterize under laboratory conditions. If this is done by lowering pressures and temperatures to obtain rates and selectivities without interference from heat and mass transfer and homogeneous reaction, then the results may have little relevance to an atmospheric pressure industrial reactor. The principal investigators plan an experimental and modeling program to characterize catalytic oxidation reactions and reactors in situations which would be useful in designing new configurations for chemical synthesis by partial oxidation and for pollution abatement by total oxidation. They will consider novel reactor geometries designed to manipulate flow patterns and residence times to adjust heat and mass transfer and contacting in order to attain maximum selectivity to a desired product. Various types of catalytic monoliths and also fluidized beds will be used to achieve very high mass and heat transfer rates and very short residence times in adiabatic reactors so that the yields of intermediates can be maximized. Reactors will be operated adiabatically to allow reaction heat to determine reactor temperature and to si mulate industrial reactors more closely. Staged monoliths will also be examined to determine how systematic variations in reactor with position can be used to control performance. Catalyst geometries, flow conditions, and temperatures will be altered such that wide variations in these properties can be attained. n 7 ÕSPL152FTMP n 7 ÕSPL1671TMP n 7 Abstract - Schmidt Oxidation reactions are difficult to manage because in most situations they exhibit a complex interplay b + + ! ! ! D + + ( Times New Roman Symbol & Arial " h E E E R / Maria K. Burka Maria K. Burka

摘要-施密特 氧化反应难以控制，因为在大多数情况下，它们表现出表面反应、传质、传热和均相反应之间的复杂相互作用。 这些因素在反应器的温度变化、流动模式、多稳态和反应选择性方面产生复杂的实验行为。 据估计，所有工业催化过程中有一半是氧化反应，这在实验室条件下难以表征。 如果这是通过降低压力和温度以获得速率和选择性而不受传热和传质以及均相反应的干扰来完成的，则结果可能与大气压工业反应器几乎没有相关性。 主要研究人员计划一个实验和建模程序，以表征催化氧化反应和反应器的情况下，这将是有用的，在设计新的配置，化学合成部分氧化和总氧化减少污染。 他们将考虑设计用于操纵流动模式和停留时间的新型反应器几何形状，以调节传热和传质以及接触，从而获得对所需产物的最大选择性。 将使用各种类型的催化整料以及流化床来实现非常高的传质和传热速率以及在绝热反应器中非常短的停留时间，使得中间体的产率可以最大化。 反应器将自动操作，以允许反应热确定反应器温度，并更接近地模拟工业反应器。 还将检查分级整料以确定反应器随位置的系统变化如何用于控制性能。 催化剂的几何形状、流动条件和温度将被改变，从而可以获得这些性质的广泛变化。 n 7 公司简介 n 7 电子邮件：[e-mail] n 7 摘要-施密特 氧化反应很难控制，因为在大多数情况下，它们表现出复杂的相互作用B + + ! ! ! D + + ( Times New Roman 符号Arial " H E E E R / 玛丽亚·K布尔卡玛丽亚K。布尔卡