Synthesis system pressure
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There was a question on today’s exam; I would appreciate it if you could provide me with a comprehensive answer. Thank you in advance: What are the hazards of high pressure in a methanol synthesis system? How to proceed to resolve it?
Come in and help solve it, please? ·······················
High synthesis pressure occurs: 1. The amount of feed gas is too large； 2. The amount of gas released is too small ； 3. Decline in catalyst activity. Solutions: 1. Reduce the amount of feed gas ； 2. Increase the amount of vented gas ； 3. Replace the catalyst.
High pressure in the synthesis system first increases the power consumption of the turbine, making it difficult for the turbine to operate; excessive pressure also poses a risk of explosion. It can also damage the catalyst, causing it to break apart. The solution is to reduce the amount of air pumped in by the compressor and increase the flow rate of the vent gas.
High synthesis pressure leads to increased system load, raising the likelihood of side reactions, as well as increasing the load on the circulation pumps; consequently, the system pressure difference increases. Solution: One is to reduce the compressor outlet pressure ； Second, appropriately increase the temperature of the synthesis reaction ； Third is the temperature after precipitation cools down.