Basic Knowledge of Ammonia Synthesis – One Question per Day 63

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Single-choice question 1: The effect of changes in the hydrogen-to-nitrogen ratio on the equilibrium ammonia concentration at the outlet of the synthesis tower is (). A. As the hydrogen-to-nitrogen ratio increases, the equilibrium ammonia concentration rises. B. As the hydrogen-to-nitrogen ratio increases, the equilibrium ammonia concentration decreases. C. There is an optimal hydrogen-to-nitrogen ratio. D. There is no effect. 2. The effect of changes in the hydrogen-to-nitrogen ratio on the reaction rate of ammonia synthesis is (). A. As the hydrogen-to-nitrogen ratio increases, the reaction rate increases. B. As the hydrogen-to-nitrogen ratio increases, the reaction rate decreases. C. There is an optimal hydrogen-to-nitrogen ratio. D. There is no effect. 3. When the chiller is operating normally, if the inlet pressure is high, then it is necessary to (). A、Increase speed, B、Decrease speed, C、Close the anti-surge valve, D、Close the outlet valve. 4. When the chiller is operating normally, if the inlet pressure is low, then it is necessary to (). A、Increase speed, B、Decrease speed, C、Close the anti-surge valve, D、Close the outlet valve. 5. The inter-stage seal of the syngas compressor is (). A、Labyrinth type, B、Dry gas seal, C、Mechanical seal, D、All of the above. Correct answers: 1. (C), 2. (C), 3. (A), 4. (B), 5. (A).