Iron precipitation phenomenon when a solubilizer in the form of iron powder is added to coal for gasification
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What is the iron precipitation phenomenon that occurs when a solubilizer in the form of iron powder is added to coal used for gasification? Where does this phenomenon manifest itself, and what are its impacts on the system?
The cosolvent should be iron oxide; the gasification furnace operates in a reducing atmosphere, which reduces iron oxide to elemental iron. This reduces the amount of iron oxide in the coal, and as a result the ash melting point increases, which is not favorable for the flow within the gasification furnace. The iron content is mainly determined in the slag – that’s just my personal opinion. I’m not sure if you use Shell gasifiers?
The slag temperature is high, resulting in reduced viscosity; no eutectic mixture forms between iron and slag.
Iron oxide reduces elemental iron; in the case of refractory brick furnaces, this accelerates the erosion of the furnace bricks