Synthetic temperature rise

This is not necessarily the case; the optimal activity temperature for synthetic catalysts lies between 240 and 260 degrees Celsius, and it is not proportional to temperature. Generally, one looks at the overall conversion rate, but it also depends on the profit situation. When business is good, it can be increased if the conversion rate drops. If market conditions are poor, keep operating but produce less.

This is not necessarily the case; the optimal activity temperature for synthetic catalysts lies between 240 and 260 degrees Celsius, and it is not proportional to temperature. Generally, one looks at the overall conversion rate, but it also depends on the profit situation. When business is good, it can be increased if the conversion rate drops. If market conditions are poor, keep operating but produce less.

Using system pressure and output as measurement criteria, there is no fixed time frame for this; if the catalyst performs well and the gas composition is satisfactory, the temperature can be increased over a longer period of time. Generally, the temperature is raised every 5 months by about 2–3 degrees, depending on the specific circumstances. As long as there is output and the system pressure remains low, there is no need to increase the temperature, as higher temperatures result in more by-products

Basis for raising the temperature: The carbon dioxide content in the circulating gas is continuously increasing； The production of crude methanol has declined significantly ； The amount of gas released continues to increase ； The inert gas content in the circulating gas decreases················

This post was last edited by 406351927 on 2010-11-15 at 12:00. We use a shell-and-tube type three-tower double-effect methanol synthesis unit; our temperature increase range is between 200 and 270 degrees, with an increase of no more than 15 degrees per hour. The process is divided into two stages, and the amount of water produced is used as a criterion to determine when the temperature should be increased – distinguishing between physically produced water and chemically produced water. After a certain period of time during which physically produced water is generated, the rate of physical water production remains stable at a very low level, for example 1 KG every 2 hours, and this stability can last for 8 to 12 hours. Once this period ends, it indicates that the physical water production stage has been completed, and at this point the catalyst’s temperature curve shows a significant increase. Then the temperature of the chemically treated water is reached, followed by a relatively stable phase until the chemically treated water is ready, at which point the heating and reduction of the catalyst are essentially complete. The vent gas flow rate is normally maintained at 45,000 Nm3/h

If it can operate at low temperatures, try not to raise the temperature. Generally, when the amount of vented gas is high, the temperature can be increased appropriately to consider economic efficiency. The temperature increase should preferably not exceed 1 degree. (Each time)

Luchi synthesis tower, catalysts from the Southwest Research Institute; the temperature increase is limited to no more than 1 degree per adjustment, primarily based on production volume

It is generally determined based on factors such as the crude methanol production volume, system pressure (the amount of vent gas), and the quality of the reaction process. If it is methanol produced from natural gas, then the content of CH4 in imports and exports also needs to be considered.

It is generally determined based on factors such as the crude methanol production volume, system pressure (the amount of vent gas), and the quality of the reaction process. If it is methanol produced from natural gas, then the content of CH4 in imports and exports also needs to be considered.