[問題] 想問一題反應工程考古題

看板ChemEng作者 (Ivan)時間15年前 (2011/03/20 15:24), 編輯推噓4(403)
留言7則, 5人參與, 最新討論串1/3 (看更多)
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?? -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 61.225.114.220

03/21 22:46, , 1F
CSTR
03/21 22:46, 1F

03/22 13:24, , 2F
關鍵字 well-mixed 根據長期寫考古題的直覺~"~
03/22 13:24, 2F

03/22 13:24, , 3F
所以是CSTR
03/22 13:24, 3F

03/22 19:35, , 4F
批次的不是也有假設?
03/22 19:35, 4F

03/22 19:37, , 5F
應該是說flow + well-mixing
03/22 19:37, 5F

03/23 19:48, , 6F
我是用unsteady state(batch)算出答案的ㄝ = = 囧了!
03/23 19:48, 6F

03/24 17:17, , 7F
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?
03/24 17:17, 7F
文章代碼(AID): #1DXQkHyY (ChemEng)
文章代碼(AID): #1DXQkHyY (ChemEng)