How to Determine Reaction Kinetics and Conversion Rates for Ammonia Synthesis?

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Finding kinetic data for ammonia production using iron catalysts is challenging, as the kinetics are specific to the system and influenced by the catalyst's quantity, quality, and state. There is no universal rate constant for catalyzed ammonia synthesis, and the reaction operates under equilibrium conditions, meaning optimizing pressure and temperature may yield better results than focusing solely on the catalyst. The KAAP Kellogg process with Ruthenium catalysts shares similarities with the traditional Kellogg process, but detailed changes are less documented. The provided article may not contain the exact conversion data needed, as such information is often system-specific and may not be readily available in existing literature. Overall, the discussion highlights the complexity of obtaining reliable kinetics and conversion data for ammonia synthesis processes.
Thermo
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I need to design an ammonia production process but I can't find the kinetic info from the articles online. The catalyst will be iron. Can somebody explain how to find kinetics data and conversion rate? I found some articles but there was no conversion info on them.
 
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And how can I find a detailed process information of KAAP Kellogg modern process with Ruthenium catalyst? It's quite similar to the Kellogg process with the iron catalysts one. However I need to know what changes with the modern one.
 
It is complicated because the kinetics will depend on the quantity, quality and state of the catalyst. There won't be a rate constant for "catalysed ammonia synthesis", it will be specific to your system. Moreover, the reaction is an equilibrium, so the best way to increase yield may be via the pressure and temperature, not the catalyst. This might be helpful: http://pubman.mpdl.mpg.de/pubman/item/escidoc:736938/component/escidoc:932945/Ammonia+Synthesis.pdf. I don't think it gives you the numbers you want, but I don't think those numbers exist as such; see e.g. the turnover rates in Table 1, dependent on particle size.
 
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mjc123 said:
It is complicated because the kinetics will depend on the quantity, quality and state of the catalyst. There won't be a rate constant for "catalysed ammonia synthesis", it will be specific to your system. Moreover, the reaction is an equilibrium, so the best way to increase yield may be via the pressure and temperature, not the catalyst. This might be helpful: http://pubman.mpdl.mpg.de/pubman/item/escidoc:736938/component/escidoc:932945/Ammonia+Synthesis.pdf. I don't think it gives you the numbers you want, but I don't think those numbers exist as such; see e.g. the turnover rates in Table 1, dependent on particle size.
I see but our professors want us to find an article that explains the reaction kinetics and conversion. We can't start doing mass balance because of the lack of information about the conversion (we do not need the kinetics right now). But thanks for the the source. It seems like a useful article.
 
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