Changes that occur when urea H2O/CO2 levels increase
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A low H2O/CO2 ratio is the key parameter for controlling the complete circulation of urea in aqueous solutions, and it is also one of the important factors in improving the conversion rate of urea. What changes will occur in the system as the H2O/CO2 ratio increases? This post was last edited by yunanshu on 2008-4-24 at 16:25.]
(1) The conversion rate in the synthesis tower decreases, and the cycle load in the first stage increases. (2) The temperature difference between the top and bottom of the synthesis tower decreases; when this ratio reaches around 0.85, the temperature difference is 0. (3) After the second-stage decomposition, the urea concentration drops. The concentration of the urea solution after this decomposition is 66.9%, and maintaining an appropriate water balance throughout the system is one of the indicators that the H2O/CO2 ratio is at 0.65
1. In the urea synthesis reaction, water is a product of the reaction; increasing the amount of water raises the concentration of this product, which is unfavorable for the equilibrium of the urea synthesis reaction and leads to a decrease in the conversion rate. It is generally believed that for every 0.1% increase in the water-to-carbon ratio (H2O/CO2 molecular ratio) in the feed to the urea synthesis tower, the conversion rate of urea synthesis decreases by about 1%. Urea production always strives to minimize the water-to-carbon ratio. For the full-circulation aqueous solution method, the water-to-carbon ratio should be controlled at
Thank you to the original poster for the information, I’m learning*!!!!!!!!!!!