Catalyst heavy metal contamination?
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What phenomena occur when heavy metals such as iron and sodium contaminate catalytic catalysts? Thank you!
Catalytic activity decreases, and the product distribution worsens
A red color of the catalyst indicates iron poisoning; once the catalyst is poisoned, its activity **decreases**, the quality of the product worsens, and there is an increase in gas and coke.
The main manifestation is an increase in the hydrogen to methane ratio