What is the effect of ammonia in raw gas on shift catalysts?
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What is the effect of ammonia in raw gas on shift catalysts? When switching to a cobalt-molybdenum catalyst, if the catalyst becomes deactivated, I want to know why that happens.
I’m not entirely sure about the impact of ammonia on catalysts, but it causes significant damage to the heat exchangers that follow; it reacts with carbon dioxide to form ammonium salts that clog the heat exchangers
The most severe form of deactivation is likely the presence of water in the raw gas; this leads to the loss of active components, catalyst fragmentation, and rapid deactivation.