EFFECTS OF OXYGEN ON THE FT SYNTHESIS OVER Fe-Cu-K CATALYST
作者:
Zhao-Tie Liu,
Jing-Lai Zhou,
Bi-Jiang Zhang,
期刊:
Fuel Science and Technology International
(Taylor Available online 1995)
卷期:
Volume 13,
issue 2
页码: 215-223
ISSN:0884-3759
年代: 1995
DOI:10.1080/08843759508947674
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
The poisoning of commercial coprecipilated Fe-Cu-K catalyst by oxygen in the Fischer-Tropsch synthesis was investigated, since synthesis gas obtained by the gasification of coal contains O2. The pretreated catalysts were oxidized in a oxygen-containing syngas.The effects of poisoning methods, reaction temperature, and oxygen fed to catalyst on the catalytic behavior of reduced Fe-Cu-K catalyst in a fixed bed were studied for synthesis tests with the ratio H2/CO of 2.3 containing O25.16×10−3under 2.62 MPa and 524.2 K. The relative activity of catalyst exceeded 1 for the first few hours of poisoning by oxygen both in prepoisoning and poisoning in situ process, then decreased linearly with the increasing of oxygen fed to catalyst, and finally increased to the relative activity of 0.6-0.7. The activity decreased less rapidly poisoning in situ than that of prepoisoning. The gaseous hydrocarbons average molecular weight increased greatly when poisoned by oxygen. The wax weight percentage in products and the ratio of olefin to paraffin decreased as poisoned by oxygen. Oxygen also affects the composition of oils and the contents of oxygenated compounds formed in water phase.
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