In-situ spectroscopic investigations of Fischer-Tropsch catalysts

费托催化剂的原位光谱研究

• 批准号: 2485151
• 金额: --
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2485151
• 关键词: situ; spectroscopic; investigations; Fischer; Tropsch

ObjectivesThis project aims to gain new insight into the mechanisms of operation of Manganese-promoted cobalt oxide catalysts for the Fischer-Tropsch (FT) reaction by using Near-Ambient Pressure X-Ray Photoelectron Spectroscopy (NAP-XPS surface sensitive spectroscopic technique) to study the surface chemistry of the catalyst in-situ. In particular, manganese doping has been shown to be benefical to the catalyst's activity and selectivity, but it is not well understood whyThe objectives are:Develop methodology to be able to study real commercial FT catalysts using Near-Ambient Pressure XPSInvestigate the effect of manganese doping on the reduction of the catalystInvestigate the evolution of the surface chemistry of the reduced catalyst in response to water exposurePerform the Fischer-Tropsch reaction in-situ in NAP-XPS to elucidate the nature of the active phaseApproachThe student will employ NAP-XPS to study catalyst samples supplied by BP. To complement our understanding of these materials, the student may also develop simpler model catalysts based on foils and/or evaporated thin films. Other complementary characterization may include but not be limited to: catalytic testing, Infrared Spectroscopy and Raman SpectroscopyNovel science contentTechnique development Mechanistic understanding of heterogeneous catalysts in general lags far behind materials discovery, meaning that most catalysts are discovered by trial-and-error. By studying the surface chemistry of catalysts in-situ, we can gain fundamental understanding of how they work which will allow the rational design of new catalysts. Developing NAP-XPS methodology to study catalysts in-situ is a vital component of this and could be broadly applicable to diverse catalytic systemsUnderstanding the Fischer-Tropsch processThe FT process converts a feedstock of carbon monoxide and hydrogen into synthetic fossil fuels (gasoline, diesel and kerosene). It is an attractive proposition in light of the need to reduce carbon emissions as the feedstock can come from renewable sources such as biomass or municipal solid waste - potentially enabling "green" fossil fuels. Improving the selectivity, stability and activity of FT catalysts via understanding in detail how they work could hold the key to the widespread adoption of FT as a technology.

本项目旨在通过近常压X射线光电子能谱(NAP-XPS表面敏感光谱技术)原位研究催化剂的表面化学，对锰助氧化钴催化剂用于费-托(FT)反应的机理有了新的认识。特别是，锰掺杂已被证明有利于催化剂的活性和选择性，但其目的是：开发能够使用近常压XPS研究真实商业FT催化剂的方法学调查锰掺杂对催化剂还原的影响调查还原催化剂在水暴露时的表面化学演变在NAP-XPS中进行原位费托反应以阐明活性相的性质方法学生将使用NAP-XPS研究由BP提供的催化剂样品。为了补充我们对这些材料的理解，学生还可以开发基于箔和/或蒸发薄膜的更简单的催化剂模型。其他互补的表征可以包括但不限于：催化测试、红外光谱和拉曼光谱新的科学内容技术发展机理对多相催化剂的认识总体上远远落后于材料发现，这意味着大多数催化剂是通过反复试验发现的。通过对催化剂表面化学的现场研究，可以从根本上了解催化剂的工作原理，为合理设计新型催化剂提供依据。开发NAP-XPS方法以现场研究催化剂是其中的重要组成部分，可广泛适用于各种催化体系。在费托过程下，FT过程将一氧化碳和氢的原料转化为合成化石燃料(汽油、柴油和煤油)。考虑到减少碳排放的必要性，这是一个有吸引力的提议，因为原料可以来自生物质或城市固体废物等可再生资源--这可能使“绿色”化石燃料成为可能。通过详细了解FT催化剂的工作原理，提高FT催化剂的选择性、稳定性和活性，这是FT作为一种技术被广泛采用的关键。