[Knowledge of Ammonia Synthesis] Daily Question (11) 12/31/2009
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When replying to a post, please hide the answers; responses without hiding them will not be graded in principle. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 True or False question: 1. When reducing the ammonia synthesis catalyst, increasing the pressure increases the likelihood of water vapor poisoning of the catalyst. （） 2. During the reduction phase of the ammonia synthesis catalyst, the heating rate depends on the ammonia content at the outlet of the synthesis tower. （） 3. The higher the temperature, the lower the vaporization heat of ammonia. （） 4. Throttling expansion causes the temperature of liquid ammonia to drop. （） 5. Generally, the purpose of heating up equipment in synthetic circuits that operates under high temperature and pressure before increasing the pressure is to prevent hydrogen corrosion. （）
This post was last edited by Tianya Langji on 2009-12-30 21:56. 1. During the reduction of ammonia synthesis catalysts, an increase in pressure increases the likelihood of water vapor poisoning of the catalyst. (Y) 2. During the main reduction phase of the ammonia synthesis catalyst, the heating rate depends on the ammonia content at the outlet of the synthesis tower. (N) 3. The higher the temperature, the lower the vaporization heat of ammonia. (N) 4. Throttling expansion causes the temperature of liquid ammonia to drop. (Y) 5. Generally, the purpose of heating up equipment in synthetic circuits that operates under high temperature and pressure before increasing the pressure is to prevent hydrogen corrosion. (N)
Right, wrong, wrong, right, right 1# chen3jun
1. During the reduction of ammonia synthesis catalysts, an increase in pressure increases the likelihood of water vapor poisoning of the catalyst. (Yes) 2. During the reduction phase of the ammonia synthesis catalyst, the heating rate depends on the ammonia content at the outlet of the synthesis tower. (Incorrect) 3. The higher the temperature, the lower the vaporization heat of ammonia. (Yes) 4. Throttling expansion causes the temperature of liquid ammonia to drop. (Yes) 5. Generally, the purpose of heating up equipment in synthetic circuits that operates under high temperature and pressure before increasing the pressure is to prevent hydrogen corrosion. (Mistake)