Net value of methanol to alcohol synthesis
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What is the typical net alcohol content at the inlet and outlet of a methanol synthesis catalyst? Is the methanol content at the inlet of the synthesis tower equal to the saturated methanol vapor concentration corresponding to the temperature after the water cooler? So, what is the methanol vapor content at a temperature of around 30 degrees? Our plant uses a C307 catalyst from Nanhua Institute; it has been in operation for 2 years. Recently, wax was boiled there, and the temperature after water cooling was 27 degrees. I conducted analyses, and the methanol content in the fresh gas was around 100 PPM. At the inlet of the synthesis tower, it was about 3%, while at the outlet (before water cooling) it was around 9%
The saturated vapor pressure of methanol at 30 degrees is 21.75674 KPa; theoretical calculations cannot be applied in practice. Water washing is carried out to improve the efficiency of methanol separation. After washing, the methanol content in the gas is generally 0.5%
Isn’t a 3% alcohol content at the inlet of the synthesis tower, as mentioned by the poster, too high? Such a high alcohol content poses a serious threat to both the compressor and the synthesis catalyst! The ethanol content in our feed gas entering the tower is generally below 0.2%. The temperature after water cooling is 27 degrees, which indicates that there is no issue with the water cooling system. Could it be that the poor separation performance of the separator is causing a high methanol content in the circulating gas?
Depending on the tower type and catalyst, it can reach up to around 12–15%, while the conventional value is around 6–8%
Is there a manual analysis method?
OP, that’s way too high. . . You dare to set three points for the input to the synthesis tower? ? Zero point three, right? ? ? Next time I go to your place, I’ll bring you a few tubes for you to test carefully. . .