CO conversion furnace
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Question: In CO conversion furnaces, what impact do impurities such as dust, oil, and water in the raw gas have on the conversion efficiency and the catalyst?
It can be said that these impurities are all poisons for conversion catalysts. The operating conditions in the first conversion furnace are the most severe; therefore, a pre-conversion furnace is usually installed before it to filter out these impurities and protect the catalysts that follow.
Oil and water can cause catalyst poisoning and surface caking, affecting the conversion efficiency.
Dust will cover the surface of the catalyst, reducing its pores and increasing the bed resistance, thereby limiting the production capacity； Oil is a poison to catalysts and can cause chronic poisoning of the catalysts ； Water can cause the catalyst to become pulverized, agglomerated, and lose its activity
I agree with what was said on the third floor. Therefore, the presence of dust, oil, and water reduces the catalyst’s activity, leading to a decrease in the reaction conversion rate. In normal production processes, a gas separator is installed before the reaction furnace to remove any liquid water that may be present in the gas, and a raw material gas filter is used as well; this filter contains protective agents that help remove impurities that could harm the catalyst
I would like to ask everyone what methods are available for removing oils and tar-like impurities from raw gas, preferably with practical engineering examples.
If these things are present, just add a filter in front of them; when the resistance increases, replace it
All of these can poison the catalyst, and they must be removed before entering the shift converter; otherwise, the catalyst will be poisoned, affecting the conversion efficiency.
Oil will decompose into carbon, and impurities will cause blockages, leading to an increase in resistance within the converter bed layer and a reduction in its activity. Liquid water can cause the loss of active components in the catalyst or lead to its pulverization, increasing resistance. The aforementioned impurities are generally harmful
Generally, washing water is used during the gasification process to remove most of the impurities such as ash and oil. In the shift unit, we install a gas-liquid separator to remove most of the moisture; by then overheating the mixture ensures that no liquid water enters the shift reactor under normal conditions ； We have also installed spray water in the water separator; this water not only cools the gas to facilitate better water separation, but it also helps to remove the ash and oil carried in by the gas.
A cyclone separator should work