The effects of the harsh conditions achieved when operating the Fischer-Tropsch synthesis at high conversion on the activity and selectivity of Pt-Co/Al₂O₃ were studied in a slurry bed reactor at T = 220 °C, P = 20 bar, with a feed simulating synthesis gas generated by air-blown gasification (H₂: CO: N₂ = 4:2:6). The rate of CO consumption decreased with increasing conversion. Decreasing the space velocity and thus increasing the CO conversion was found to have slight effect on CO₂ selectivity until a conversion of CO of 75%, after which a strong increase was observed. The production of CO₂ raised the H₂/CO ratio within the reactor resulting in a large increase in methane selectivity. An increase in CO conversion resulted in a decrease in chain growth probability and C₅₊ selectivity. The link between the change in the methane selectivity, chain growth probability and C₅₊ selectivity and the presence of carbonaceous species on the surface is explored.

在T = 220°C，P = 20 bar，淤浆床反应器中研究了费托合成高转化率条件下苛刻条件对Pt-Co / Al ₂ O ₃活性和选择性的影响。用模拟风吹气化生成的合成气的进料（H ₂：CO：N ₂  = 4：2：6）。CO消耗率随着转化率的增加而降低。发现降低空速并因此增加CO转化率对CO ₂选择性具有轻微影响，直到CO转化率为75％，之后观察到强烈的增加。CO _2的产生使H ₂升高反应器内的/ CO比导致甲烷选择性大大提高。CO转化率的增加导致链增长概率和C ₅₊选择性降低。探讨了甲烷选择性，链增长概率和C ₅₊选择性的变化与表面碳质物质之间的联系。