Microwave-Induced Oligomerization of Methane

摘要--SuIB-9413394这项研究涉及在有或没有催化剂的情况下使用微波加热，以通过齐聚反应将甲烷转化为高碳氢化合物。此外，还将利用微波诱导加热前驱体锰氧化物溶胶和凝胶来制备高度分散的微孔锰氧化物，并将其用作齐聚催化剂。将优化反应器类型、操作模式(接触时间、脉冲与连续)和添加介质，以优化转化率和选择性。将开发原位表征方法来监测反应机理。该项目的目标是制备微孔二氧化锰(MnO2)微波诱导齐聚(MIO)催化剂，研究甲烷合成高级烃的MIO，阐明MIO反应的机理细节，并研究反应器结构、添加剂(链增殖剂、电介质)、温度测量、磁场效应和反应条件的基本方面。所有的反应都将在流动系统中进行。表征研究将包括用气相色谱-质谱分析方法进行产品分析，微波诱导声学研究此类体系中的热和能量传递，以及碳氢化合物中间体和产品的傅里叶变换红外研究。长期目标是了解控制微波诱导反应的产品选择性和长期稳定性的因素。

Abstract - Suib - 9413394 This research involves the use of microwave heating in the presence and absence of catalysts for conversion of methane into higher hydrocarbons via oligomerization reactions. In addition, microwave-induced heating of precursors of manganese oxide sols and gels will be used to prepare highly dispersed microporous manganese oxides that will be used as oligomerization catalysts. Optimization of reactor types, modes of operation (contact times, pulse versus continuous), and addition of dielectrics will be done to optimize conversion and selectivity. In situ characterization methods will be developed to monitor the mechanisms of reaction. The goals of the project are to prepare microporous manganese dioxide (MnO2) Microwave-Induced Oligomerization (MIO) catalysts, to study MIO of methane to higher hydrocarbons, to elucidate mechanistic details of MIO reactions, and to study fundamental aspects of reactor configurations, additives (chain propagators, dielectrics), temperature measurements, magnetic field effects, and reaction conditions. All reactions will be done in a flow system. Characterization studies will involve product analyses by gas chromatography mas spectrometry methods, microwave-induced acoustic studies of heat and energy transfer in such systems, and Fourier transform infrared studies of hydrocarbon intermediates and products. The long-term goal is to understand factors which control product selectivity and long-term stability of microwave-induced reactions.