[問題] 想問一題反應工程考古題

[chetsai (Ivan)]

A rapid,first-order liquid reaction is carried out in a
fixed-volume,well-mixed flow reactor under isothermal condition.Let τ and Ts
be the space time and the time necessary to reach 99% ofthe steady-state
concentration,
respectively.Please derive the following relation: Ts=4.6/k,where k is the
specific reaction rate.

我有疑問的是這題到底是steady state 還是 unsteady state 呢???

而且到底是batch 還是flow system呢?

因為我的想法是: flow 系統他得體積是固定的 ,且濃度是隨space time變
                 batch 系統濃度是隨時間變的

所以有點被搞混!!  想請問我觀念哪裡錯了??



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推 allen770:CSTR
推 bbdd203:關鍵字 well-mixed  根據長期寫考古題的直覺~"~
→ bbdd203:所以是CSTR
→ thius413:批次的不是也有假設?
推 thius413:應該是說flow + well-mixing
→ kenhalu:我是用unsteady state(batch)算出答案的ㄝ = = 囧了!
推 ken415202:想問這題到底是批次還是連續 怎麼都一起出現在同一題中?