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Since June of this year, after the newly upgraded isothermal shift unit in our company came online, the methane output at the system outlet has been high, the content of inert gases in the methanol synthesis process is high, and there is a large amount of vent gas. Recently, this has led to a high water content in the methanol washing process, poor regeneration efficiency in the methanol regeneration system, and oil contamination in the system condensate. We would appreciate it if experts could provide some guidance
Methanation side reactions, thiol side reactions – primarily occur at low temperature ranges, which are suitable for the formation of thiols
Which technology is used for isothermal transformation? How much should the temperature of the bed layer be controlled? What is the outlet temperature?
What is the methane content during normal operation? What is the methane level now that there’s an anomaly? Generally, when the methane content in the feed gas does not exceed 1%, it has little impact on low-temperature methanol washing. With an increase in methanol content in the system, has operational issues been ruled out first? Sometimes, when the methanol content is high, operators make many adjustments; some of these improper actions can lead to a deterioration in operating conditions. Poor methanol regeneration: I’m not quite sure what you mean by ‘poor’ Has the sulfur content increased in lean methanol? The appearance of oil stains may be due to reactions similar to Fischer-Tropsch synthesis. Are your high-temperature equipment components made of carbon steel?