I have two questions regarding methanol
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1. What is the most critical control parameter in the methanol purification system? 2. What should be done if the methanol product does not meet the standards?
I wonder what your methanol is used for? We are participating in a reaction, so the water content is the most important indicator.
The most critical parameter in the purification system is that the total sulfur content should be less than 0.1 ppm; this requirement applies whether it is low-temperature methanol washing, dry desulfurization, or other purification methods, and its purpose is to protect the synthesis catalyst. If the methanol does not meet the standards, it is necessary to specify which parameter is not up to spec; however, the usual solution is to carry out re-distillation and adjust the parameters as appropriate.
1. The most critical control parameter in the methanol purification system is hydrogen sulfide. Methanol production requires a high level of purity in the feed gas; even trace amounts of hydrogen sulfide can cause catalyst poisoning and prevent the plant from operating properly. To keep the total sulfur content at ≤0.1 ppm, in addition to using semi-water gas desulfurization, further precise desulfurization of the shift gas is also required. 2. If the methanol product does not meet the standards, it must be sent back to the system to be processed again. If the moisture content is slightly above the acceptable level, it can still be mixed into the finished product, but careful calculation is required to ensure that the overall quality remains satisfactory after mixing.
The reply on the 4th floor was detailed and accurate; thank you. I guess my level is too low to give a rating, sorry! This post was last edited by Dopoda on 2009-3-21 08:43]
Methanol is generally produced through three routes: coal, natural gas, and syngas. The composition of the conversion gas varies among these three routes, as do the requirements regarding elements such as sulfur, nitrogen, and heavy metals； Methanol products are generally divided into two categories: GB grade and AA grade per American standards. If the water content is too high, it is usually due to poor distillation efficiency; appropriate adjustments can resolve this issue.