Criteria for catalyst replacement in methanol synthesis towers
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What are the criteria for determining when it is necessary to replace the catalyst in a methanol synthesis tower? Please share your experiences.
It mainly depends on production volume and tower temperature, taking into account the gas composition as well
Hot spot temperature, equilibrium temperature difference, product quality, and conversion rate. . .
What is the typical maximum operating temperature for domestic catalysts before they stop working?
Even after the hotspot temperature is increased, the conversion rate still does not rise.
Looking at the conversion rate, the methanol production cannot increase; the amount of off-gas rises, and the circulation volume within the synthesis tower increases
The increase in methanol production after raising temperature and pressure is not significant； The conversion rate decreases, the off-gas volume increases, and the pressure drop across the catalyst bed increases
It is mainly the conversion rate; before reaching the optimal temperature, a decrease in conversion rate means that raising the temperature will definitely have an effect. There are also factors such as product quality, and there are many ways to assess them.
It is mainly the conversion rate; before reaching the optimal temperature, a decrease in conversion rate means that raising the temperature will definitely have an effect. There are also factors such as product quality, and there are many ways to assess them.
Conversion rate and product quality: at high tower temperatures toward the end of the process, the heavier components remain as inert gases, resulting in a low conversion rate; meanwhile, by-products such as ethanol increase.
1. The hotspot temperature decreases. 2. Low conversion rate