Fe₃O₄-FeO基熔铁催化剂费–托合成反应性能

Performances of Fe₃O₄-FeO Based Fused Iron Catalysts for Fischer-Tropsch Synthesis

摘要: 在固定床反应器中进行了反应温度、压力、空速、氢碳比、粒度对Fe₃O₄-FeO基(nFe²⁺/nFe³⁺ = 0.89 - 1.5)熔铁催化剂费–托合成反应性能的影响研究。实验结果表明，该熔铁催化剂低温活性良好，在493 K时，CO转化率51.93%。通过降低氢碳比、温度或空速，或升高反应压力，可以减小甲烷选择性，特别是温度的影响作用结果明显，由5.80%降至2.99%。催化剂粒度小于0.1 mm消除了在固定床中的内扩散影响。反应条件对Fe₃O₄-FeO基熔铁催化剂F-T合成反应性能影响规律和其它铁基催化剂F-T合成类似。

Abstract: The effects of reaction temperature, pressure, space velocity, H2/CO ratio and particle size on per-formances of Fe₃O₄-FeO based fused iron catalysts for Fischer-Tropsch synthesis have been inves-tigated in a fixed-bed reactor. The results show that, the activity of the catalysts was well at low temperature. Conversion of carbon monoxide was 51.93% at 493 K. The selectivity of methane could be decreased by lowering the H₂/CO ratio, temperature or space velocity, or increasing the pressure. Especially, the selectivity of methane was decreased from 5.80% to 2.99% by reducing temperature. The inner diffusion was eliminated when the particle size was less than 0.1 mm in the fixed-bed reactor. The effects of reaction conditions on Fe₃O₄-FeO based fused iron catalysts for Fischer-Tropsch synthesis were found to be similar to the other iron catalysts for Fischer- Tropsch synthesis.