Fischer-Tropsch synthesis has been investigated over a commercial type cobalt-based catalyst (20 %Co/0.5 %Re/γ-Al₂O₃) by varying the H₂/CO ratio (2.55–1.12), CO conversion (15–75 %), reaction temperature (210 °C, 230 °C), and by adding water to the syngas. The experiments were conducted in a fixed bed reactor with the main purpose of obtaining experimental data to be used in the development and fitting of a mechanistic model. A positive effect of water on the catalyst activity was found for experiments with a H₂/CO ratio higher than 1.7. Water was found to always increase the C₅₊ selectivity regardless of the H₂/CO ratio. Increasing conversion led to increased C₅₊ selectivity. The selectivity to CO₂ was significantly enhanced at higher conversions (high water partial pressure), particularly with the lowest H₂/CO = 1.12, interpreted as the emergence of water-gas shift activity. Re-oxidation of cobalt, probably limited to small cobalt particles, is proposed as the main deactivation mechanism caused by water while a steeper deactivation curve was found for higher temperature, indicating that sintering also may play a role.

费-托合成已经被研究过的商业型钴基催化剂（20％的Co / 0.5％的Re /γ-Al系₂ ö ₃）通过改变为H ₂ / CO比（2.55-1.12），CO转化率（15- 75％），反应温度（210°C，230°C），以及向合成气中加水。实验是在固定床反应器中进行的，其主要目的是获得用于建立和拟合机械模型的实验数据。对于H ₂ / CO比高于1.7的实验，发现水对催化剂活性有积极影响。发现水总是增加C _5+的选择性，而与H ₂ / CO的比率无关。转化率增加导致C ₅₊增加选择性。在较高的转化率（高水分压）下，特别是在最低H ₂ / CO = 1.12的情况下，对CO ₂的选择性显着提高，这被认为是水煤气变换活性的出现。提出将钴的再氧化（可能仅限于小钴颗粒）作为由水引起的主要失活机理，而在较高温度下发现更陡的失活曲线，这表明烧结也可能起一定作用。