Fischer–Tropsch cobalt-based catalyst deactivation is one of the major challenges facing gas-to-liquids processes. Changes in catalyst formulation and pre-treatment methods are among the promising routes to address this challenge. In this study, diluted CO was used to pre-treat a 0.5%Pt/25%Co/Al₂O₃ catalyst, in comparison to H₂, and the resulting effects on catalyst stability, activity and product selectivity were evaluated. The investigation was performed using BET, TEM, TPR, XPS and XRD techniques, combined with catalyst evaluation in a 1 L continuously stirred tank reactor. The results reveal that microporous carbon shells encapsulate Co particles during activation by CO at higher temperatures, resulting in lower activity and higher methane selectivity compared to the H₂-reduced catalyst, at early reaction times. However, the CO-activated catalyst displayed superior stability, resulting in better performance at extended time-on-stream compared to a deactivating H₂-activated catalyst, which showed an increase in CH₄ selectivity and a decline in C₅+ hydrocarbon formation rate.

费-托钴基催化剂的失活是气液转化过程面临的主要挑战之一。改变催化剂配方和预处理方法是应对这一挑战的有希望的途径之一。在这项研究中，与H ₂相比，使用稀释的CO预处理0.5％Pt / 25％Co / Al ₂ O ₃催化剂，并评估了其对催化剂稳定性，活性和产物选择性的影响。使用BET，TEM，TPR，XPS和XRD技术进行研究，并在1 L连续搅拌釜反应器中进行催化剂评估。结果表明，与早期H ₂还原的催化剂相比，与H ₂还原的催化剂相比，微孔碳壳在较高温度下被CO活化的过程中包裹了Co颗粒，导致活性降低，甲烷选择性更高。然而，与失活的H ₂活化催化剂相比，CO活化的催化剂显示出优异的稳定性，从而在延长的运行时间上具有更好的性能，后者表现出CH ₄选择性增加而C ₅下降+烃形成速率。