What is the significance of controlling the temperature of the walls in a methanol synthesis tower?

The tower wall temperature is too high； The synthesis tower is prone to damage

Generally, the material for the outer cylinder of a synthesis tower is made of low-alloy high-strength steel. Under high temperature and pressure, hydrogen molecules in the feed gas easily diffuse into the metal of the cylinder body, where they react with the carbon contained in the steel to form methane, which then escapes in gaseous form. This phenomenon is called decarburization. The structure of steel is damaged after decarburization, resulting in a **decrease in its mechanical properties**. The decarburization of steel increases with rising temperature and pressure as well as extended usage time; at high pressures, carbon steel begins to decarburize at 200 degrees, and the decarburization becomes severe above 350 degrees. Therefore, keeping the tower wall temperature within the specified limits is of great significance for protecting the synthesis tower body from hydrogen corrosion.