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首页> 外文期刊>Physical chemistry chemical physics: PCCP >Bridging the pressure and material gap in heterogeneous catalysis: cobalt Fischer-Tropsch catalysts from surface science to industrial application
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Bridging the pressure and material gap in heterogeneous catalysis: cobalt Fischer-Tropsch catalysts from surface science to industrial application

机译：弥合非均相催化中的压力和材料缺口：从表面科学到工业应用的费托钴催化剂

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摘要

The Fischer - Tropsch ( FT) process is the heart of many natural gas conversion processes as it enables the conversion of a mixture of CO and H-2 into valuable long-chain hydrocarbons. Here we report on the use of state-of-the-art surface science techniques to obtain information on the relationship between the surface atomic structure of model catalysts and their performance in the Fischer - Tropsch reaction. Cobalt single crystals and polycrystals were modified with non-reducible oxides as to resemble industrial catalysts. Reflection absorption infrared spectroscopy was used for examining the CO adsorption behaviour at room temperature as well as at 493 K at CO pressures spanning 10(-7) to 300 mbar on both (modified) Co single/polycrystals and an industrial catalyst. Polarization modulation was applied to cancel the CO gas phase absorption. Subsequently, they were subjected to reaction tests in the same apparatus at 1 bar and 493 K. This allowed us to close the material, pressure and instrument gap in the field of Fischer - Tropsch synthesis on cobalt-based catalysts.
机译：费-托（FT）工艺是许多天然气转化工艺的核心，因为它可以将CO和H-2的混合物转化为有价值的长链烃。在这里，我们报告使用最先进的表面科学技术来获取有关模型催化剂的表面原子结构与其在费托反应中的性能之间关系的信息。用不可还原的氧化物改性钴单晶和多晶，使其类似于工业催化剂。反射吸收红外光谱法用于检查室温下以及在493 K下（改性的）Co单晶/多晶和工业催化剂上的CO压力范围为10（-7）至300 mbar的CO吸附行为。施加极化调制以抵消CO气相吸收。随后，它们在1 bar和493 K的同一设备中进行了反应测试。这使我们能够关闭在钴基催化剂上的费托合成中的材料，压力和仪器间隙。

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