3 years ago

Perspectives on the Effect of Water in Cobalt Fischer–Tropsch Synthesis

Perspectives on the Effect of Water in Cobalt Fischer–Tropsch Synthesis
Anders Holmen, Erling Rytter
Water is an inherent component in Fischer–Tropsch synthesis on Co catalysts, and the effect of water is discussed with an emphasis on alumina and aluminates as support materials. Water may affect the selectivity, activity, deactivation, and state of the catalyst, and without exception, water is known to enhance the C5+ selectivity by increasing the chain propagation α value. The effect of water depends on the catalyst. Small-pore γ-Al2O3 is less efficient at high water content than large-pore γ-Al2O3. The effect of water on selectivity is independent of its origin: i.e., adding water to the feed has the same effect as water produced by the reaction. Arguments are provided for the effect of water being partially mechanistic in nature and occasionally due to pore condensation. In particular, we introduce water-assisted CO activation to methylidyne as an option for generation of polymerization monomers. An additional factor that needs to be considered is that high water partial pressure is concurrent with reduction in hydrogen partial pressure. The influence of water strongly depends on the type of reactor employed.

Publisher URL: http://dx.doi.org/10.1021/acscatal.7b01525

DOI: 10.1021/acscatal.7b01525

You might also like
Discover & Discuss Important Research

Keeping up-to-date with research can feel impossible, with papers being published faster than you'll ever be able to read them. That's where Researcher comes in: we're simplifying discovery and making important discussions happen. With over 19,000 sources, including peer-reviewed journals, preprints, blogs, universities, podcasts and Live events across 10 research areas, you'll never miss what's important to you. It's like social media, but better. Oh, and we should mention - it's free.

  • Download from Google Play
  • Download from App Store
  • Download from AppInChina

Researcher displays publicly available abstracts and doesn’t host any full article content. If the content is open access, we will direct clicks from the abstracts to the publisher website and display the PDF copy on our platform. Clicks to view the full text will be directed to the publisher website, where only users with subscriptions or access through their institution are able to view the full article.