One question per week (1)
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Dear forum members, in accordance with the forum’s requirements and with the approval of the moderators, a weekly question-based activity will be launched starting this week in the Synthetic Ammonia Production Discussion Area. The questions for these discussions are taken from the book \"Fertilizer Production Operators\". We hope all marine enthusiasts will participate actively. 1. What are the disadvantages of an excessive gas-to-vapor ratio for conversion reactions? Answer: 1. High consumption of water vapor, increasing production costs ； 2. Excessive water vapor dilutes the concentration of CO, thereby reducing the reaction rate ； 3. The residence time of the reaction gas in the catalyst bed is short, resulting in a reduced conversion rate ； 4. For low-temperature reactions, an excessive amount of water vapor can cause the operating temperature to approach the dew point, which is not conducive to catalyst protection.
1. Increase production costs； 2. Increase system resistance ； 3. Increase the load on subsequent heat recovery processes. 4. Sulfur-resistant CAT may become deactivated
1. Increase system resistance, resulting in higher power consumption of the product； 2. Increase the load on subsequent heat recovery processes; 3. It may lead to the desulfidation of the low-temperature catalyst, causing it to lose its activity
1. High steam consumption increases production costs. 2. Excessive steam dilutes the concentration of CO, thereby reducing the reaction rate. 3. The residence time of the reaction gases in the catalyst bed is shortened, resulting in a lower conversion rate. 4. In cases of low-conversion reactions, too much steam can cause the operating temperature to approach the dew point, which is not conducive to catalyst protection
An excessively high gas-to-vapor ratio can cause catalyst resulfidation!
Production costs are rising, and the heat load is increasing! ! 1
This post was last edited by waiwailuo on 2010-10-31 at 16:39. Increased system pressure leads to reverse sulfidation of the low-temperature catalyst, raising costs; increased space velocity further strains the temperature of the shift converter
1 Increased consumption 2 Desulfurization 3 Increased resistance
Increasing the system resistance leads to higher power consumption of the product； It increases the load on subsequent heat recovery processes; this can lead to desulfidation of the low-temperature catalyst, resulting in a loss of its activity
1. Increase production costs； 2. Increase system resistance ； 3. Increased load on subsequent heat recovery processes 4. Sulfur-resistant CAT may become inactive 5. Increased system resistance, leading to higher power consumption for the product ； 7. Increase the load on subsequent heat recovery processes; 8. It can lead to the desulfidation of the low-temperature catalyst, causing it to lose its activity.
1. Increased production costs； 2. System resistance increases ； 3. Increased load on subsequent heat recovery processes 4. Sulfur-resistant CAT may become inactive 5. Increased system resistance, leading to higher power consumption for the product ； 7. Increase the load on subsequent heat recovery processes; 8. It may lead to the desulfidation of the low-temperature catalyst, causing it to lose its activity