Engineering Research Equipment: Mossbauer Spectrometer withMagnetic Resolution for Catalysis/Coal Mineral Research

现有穆斯堡尔谱仪的一项重大升级是 执行。 电子设备得到更新和控制 原位反应气氛变温电池 能力是制造的;细胞被设计成放置在 在5英寸电磁铁的两极之间， 磁场高达11千高斯。 据认为，这是 美国最多功能的穆斯堡尔实验室S. 该设备将用于催化的几项研究 和煤化学，包括电子，磁性， 和支撑金属簇的晶格性质;活性 钴和铁催化剂在氢化过程中的相 一氧化碳;沸石的表面和体积特性 与铁或钴交换，以及它们与 一氧化氮分解活性; 在煤挥发分，焦炭氧化， 以及矿物质沉积在锅炉表面;及 飞灰中的铁化合物。

A major upgrade of an existing Mossbauer spectrometer is performed. Electronics are updated and a controlled atmosphere, variable-temperature cell with in situ reaction capability is fabricated; the cell is designed to be placed between the poles of a 5-inch electromagnet to provide a magnetic field up to 11 kilogauss. It is thought that this is the most versatile Mossbauer facility in the U. S. The equipment will be used for several studies in catalysis and coal chemistry including studies of electronic, magnetic, and lattice properties of supported metal clusters; active phases of cobalt and iron catalysts during hydrogenation of carbon monoxide; surface and bulk characteristics of zeolites exchanged with iron or cobalt, and their correlation with activity for decomposition of nitric oxide; transformations of iron minerals during coal devolatilization, char oxidation, and the deposition of mineral matter on boiler surfaces; and iron compounds in fly ash.