On the influence of oxygen on iron catalysts during ammonia synthesis and catalyst characterization
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Once again attention is brought to the sensitivity of iron catalysts to poisoning by sub ppm levels of oxygen and a procedure is suggested to evaluate the purity of the gas supply to a steady state flow reactor setup. It is demonstrated that extremely high gas purities are essential, in particular for studies of alkali promoted samples.
KeywordsIron catalysts ammonia synthesis oxygen poisoning potassium promoter
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