What is the effect of air velocity on methanol synthesis?
Thread Content
What is the effect of air velocity on methanol synthesis?
Space velocity is an important means for controlling catalyst fouling and yield in methanol synthesis. As space velocity increases, the reaction time decreases; the methanol conversion rate drops, but the total amount of gas passing through the catalyst per unit time increases, so the methanol yield still rises.
At the beginning of the reaction, low temperature and high space velocity should be used, as this helps to protect the catalyst and prevents the reaction from becoming too intense, which is beneficial for extending the catalyst’s service life.
The air velocity for reciprocating compressors is generally between 5,000 and 8,000, while for centrifugal compressors it is between 8,000 and 15,000. Above 15,000, the catalyst usually can no longer handle it
Air velocity – the flow rate of gas passing through a unit volume of catalyst per unit time, measured in h-1. Increasing the space velocity reduces the one-way conversion rate and slows down the catalytic reaction, which helps to protect the catalyst and increase yield. However, increasing the space velocity raises the energy consumption of the cycle machine; if the space velocity is too high, the reaction temperature drops significantly, making it difficult to maintain the temperature and resulting in a decrease in yield ； It is generally kept between 8,000 and 10,000