About heating up of reformer
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Reformer furnaces generally use steam instead of coke oven gas to heat up. Why? ?
Why is the catalyst in the medium-temperature iron oxide tank for fine desulfurization changed to medium-temperature zinc oxide?/
Under what circumstances will carbon precipitation occur in catalysts, and what are the dangers?
Advantages of steam heating: 1. The steam is pure, with few impurities and no coking. 2. The steam heat capacity is large and can buffer furnace temperature fluctuations. 3. At a certain temperature, steam reacts with coke to remove coke scale.
What kind of reactor is the catalyst mentioned on the third floor? Please explain.
Zinc oxide has a better desulfurization effect than iron oxide catalysts and has a larger sulfur capacity, which reduces the number of catalyst replacements.
The conversion catalyst will produce carbon under operating conditions such as the water-to-carbon ratio is too low, the catalyst is poisoned, and the operating conditions change greatly. When the carbon precipitation is severe, it will affect the catalytic performance of the catalyst, cause the reformer to overheat, and then burn out the conversion tube.
The catalyst was switched to medium-temperature zinc oxide because this catalyst has a large sulfur capacity, requires a smaller amount of catalyst for the same scale, and has a small reactor, which can reduce investment.
Can you elaborate and what are the reasons?
Carbon formation usually occurs when the temperature is too high.