Nano-sized cobalt crystallites may oxidize under realistic Fischer–Tropsch conditions, especially when operating at high conversion where oxygen availability on the surface is large. The extent of deactivation due to oxidation differs for monodispersed catalysts as opposed to a log-normal distribution of cobalt crystallites. The optimum cobalt crystallite size for a Fischer–Tropsch catalyst is dependent on not only the mean particle size, but also the log-normal variance and conversion level.

中文翻译：

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费托合成中微晶尺寸分布对钴氧化和再还原的影响：热力学分析

纳米尺寸的钴微晶可能会在实际的费托条件下氧化，特别是在高转化率下操作时，表面上的氧气可用性很大。与钴微晶的对数正态分布相反，单分散催化剂的氧化失活程度不同。Fischer-Tropsch 催化剂的最佳钴微晶尺寸不仅取决于平均粒径，还取决于对数正态方差和转化水平。