Synthesis problem
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I’ve posted similar threads before; please don’t consider this a duplicate post, as I really don’t understand it. If the synthetic catalyst ages and the synthesis rate decreases, then with the feed gas remaining unchanged, the pressure in the synthesis system will definitely increase, and the circulation volume will rise as well. So, does the pressure difference in the synthesis tower increase or decrease?
The catalyst has aged; at the same pressure and temperature, the conversion rate decreases. If the pressure is increased, the conversion rate rises, with the feed gas remaining unchanged. I believe the air velocity will increase, the circulation volume will rise, and the pressure difference in the synthesis tower will increase.
As the air velocity increases and the circulation volume rises, the pressure difference in the synthesis tower increases as well.
The catalyst has aged; if the pressure is increased, the conversion rate will rise while keeping the fresh gas unchanged. ———————————————————————————— I don’t think it necessarily needs to be increased. Is it about comparing the degree of catalyst aging with the increase in pressure!
Generally speaking, if the synthesis reaction proceeds well, the pressure difference will increase; if the reaction does not proceed well, the pressure difference should decrease accordingly
After the synthesis catalyst ages, its activity declines; when the same amount of fresh gas enters the synthesis tower, the amount of reaction gas decreases, resulting in a lower methanol yield. Therefore, a large amount of gas circulates within the synthesis system; the volume of gas entering the tower increases, and the pressure difference in the synthesis tower rises as well. In the later stages of catalyst use, it is necessary to control the pressure and temperature of the steam drum in order to increase the operating temperature of the catalyst, thereby boosting methanol production and making more efficient use of the catalyst.
As the catalyst ages, the conversion rate decreases and the pressure rises; however, increasing the pressure is beneficial for the conversion reaction, so the pressure difference should increase! Personal opinion
I personally think it should be increased! 1. As the air velocity increases, the pressure drop increases. 2. In the later stages of catalyst use, powdering leads to an increase in gas resistance, which in turn results in an increase in the pressure difference across the tower. 3. As the catalyst ages, the synthesis reaction slows down, and the pressure difference across the tower also increases.