Question 1 of the afternoon session on specialized knowledge in chemical engineering, 2014
Thread Content
For a batch-operated reactor, which of the following statements is incorrect? A. The reaction time required to achieve a certain conversion rate depends only on the reaction rate and is independent of the size of the reactor ； B. The size of the reactor is determined by the amount of material to be processed and the loading factor ； C. For the same conversion rate, the reaction time is related to the initial concentration; increasing the reaction rate constant will result in a corresponding reduction in the reaction time ； D. Intermittent reactors are flexible and simple to use, and they are suitable for production processes that require long reaction times, small batch sizes, and multiple product varieties. Am I correct in choosing A?
I also think what the two of you said is correct; I wonder what those downstairs think.
Choose C. The conversion equation for a first-order reaction is independent of the initial concentration.
A. The reaction time required to achieve a certain conversion rate depends only on the reaction rate and is independent of the size of the reactor；
I feel like D should be the answer. For option A, one can refer to the middle part of page P488 in the association’s document; for option B, it’s point 5 on page P489 of the same document; for option C, it’s the formula on page P488. As for option D, the reaction time isn’t mentioned on page P487. So I choose D
Leave a name to follow :):):):):):):):)
The reaction time is intermittently long. Multiple reactors can enable continuity in subsequent processes.
I’m here to join in the fun; I support choosing C. The reaction time isn’t necessarily related to the initial concentration – for example, in a first-order reaction, t=1/k*ln. For the same degree of conversion, it depends only on the rate constant
C is probably a mistake; C should be related to the reaction time and the reaction rate constant.
The size of plug-flow and completely mixed-flow reactors is also related to the reaction time; at a constant flow rate, the longer the reaction time, the longer the plug-flow reactor and the larger its volume