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Effect of recycle gas on activity and selectivity of Co-Ru/Al2O3 catalyst in fischer- Tropsch synthesis

Rohani, A. A ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. Publisher: 2009
  3. Abstract:
  4. In industrial scale of Gas to Liquid (GTL) process in Fischer-Tropsch (FT) synthesis, a part of reactor outlet gases such as CO2 and CH4 as side reaction products, is usually recycled. In this study, the influence of CO2 and CH4 on the performance and selectivity of Co-Ru/Al2O3 catalyst is investigated by injection of these gases (0-20 vol. % of feed) to the feed stream. The effect of temperature and feed flow rate, are also inspected. The results show that low amounts of CO2 in the feed stream, doesn't change the catalyst activity significantly but increasing the amount of CO2 (more than 10 vol. %) cause the CO conversion to decrease and the selectivity of heavy components to increase. Methane acts as an inert gas and doesn't affect the catalyst performance. Increasing feed flow rate has negative effect on both CO conversion and heavy component selectivity. By raising the temperature, CO conversion will increase but there are more volatile components in the product. The effect of CO2 on the catalyst deactivation is also investigated carefully and a mechanism is suggested to explain the negative influence of CO2 on catalyst deactivation. © 2009 WASET.ORG
  5. Keywords:
  6. Alumina ; Carbon dioxide ; Selectivity ; Catalyst performance ; CO conversion ; Cobalt catalyst ; Conversion ; Effect of temperature ; Feed flow rate ; Feed streams ; Fischer Tropsch ; Gas-to-liquid process ; Industrial scale ; Negative influence ; Ru/Al2O3 catalyst ; Side reactions ; Volatile components ; Catalyst activity ; Catalyst deactivation ; Catalyst poisoning ; Cobalt ; Fischer-Tropsch synthesis ; Flow rate ; Inert gases ; Methane ; Recycling ; Solutions ; Thermal effects ; Catalyst selectivity
  7. Source: World Academy of Science, Engineering and Technology ; Volume 37 , 2009 , Pages 587-591 ; 2010376X (ISSN)
  8. URL: https://waset.org/publications/14394/effect-of-recycle-gas-on-activity-and-selectivity-of-co-ru-al2o3-catalyst-in-fischer-tropsch-synthesis