{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Separation Process Principles- 2n - Seader &amp; Henley - Solutions Manual

# 1 v j 1 wj 1 yi j 1 j v j wj yi j j 1 l j 1

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 50), respectively: Variable φAE φSE φΑX φSX EB PX MX 0.160 0.103 0.102 0.0000 0.0000 0.0000 0.102 0.0449 0.0466 0.0001 0.0030 0.00274 OX 0.00175 0.0307 0.0003 0.0823 Now apply Eq. (3) above to obtain the component distribution: Variable f, kmol/h b/d d, kmol/h b, kmol/h EB 100 0.0001 99.99 0.01 PX 100 0.0102 98.99 1.01 MX 200 0.0091 198.20 1.80 OX 100 68.2 0.68 99.32 Comparing these Edmister method results with the FUG method, we see that the Edmister method predicts a somewhat better split of the two key components than does the FUG method for this problem. Exercise 10.1 Subject: Independency of MESH equations Given: Equations (10-1), (10-3), (10-4), and (10-6). Prove: Equation (10-6) is not independent of the other 3 equations Analysis: Eq. (10-6) can be derived from the other 3 equations as follows, as outlined in the text between Eqs. (10-5) and (10-6).. Summing Eq. (10-1) over all C components: L j −1 C i =1 xi , j −1 + V j +1 C i =1 yi , j +1 + Fj C i =1 zi , Fj − L j + U j C i =1 xi , j − V j + Wj C i =1 yi , j = 0 (1) From Eqs. (10-3) and (10-4), all 5 sums in Eq. (1) are equal to 1. Therefore, Eq. (1) becomes: L j −1 + V j +1 + F j − L j + U j − V j + W j = 0 (2) Writing Eq. (2) for each stage from Stage 1 to Stage j: L0 + V2 + F1 − L1 − U 1 − V1 − W1 = 0 L1 + V3 + F2 − L2 − U 2 − V2 − W2 = 0 L2 + V4 + F3 − L3 − U 3 − V3 − W3 = 0 ....... L j − 2 + V j + Fj −1 − L j −1 − U j −1 − V j −1 − Wj −1 = 0 (3) L j −1 + V j +1 + F j − L j − U j − V j − W j = 0 Summing Eqs. (2), noting that L0 = 0 and that many variables cancel, we obtain: V j +1 + j m =1 o r L j = V j +1 + Fm − U m − Wm − L j − V1 = 0 j m =1 Fm − U m − Wm − V1 But this is Eq. (10-6). Therefore, it is not independent of Eqs. (10-1), (10-3), and (10-4). Exercise 10.2 Subject: Revision of MESH equations to account for entrainment, occlusion, and chemical reaction (in the liquid phase). Given: MESH Eqs. (10-1) to (10-5). Find: Revised set of MESH equations. Analysis: Entrainment: Let φj = ratio of entrained liquid (in the exiting vapor) that leaves Stage j to the liquid (Lj + Uj) leaving Stage j. Then, the entrained component liquid flow rate leaving Stage j = φjxi,j (Lj + Uj). Correspondingly, the entrained component liquid flow rate entering Stage j = φj+1xi,j+1 (Lj+1+ Uj+1). Occlusion: Let θj = ratio of occluded vapor (in the exiting liquid) that leaves Stage j to the vapor (Vj + Wj) leaving Stage j. Then the occluded component liquid flow rate leaving Stage j = θj yi,j (Vj + Wj). Correspondingly, the occluded component liquid flow rate entering Stage j = θj-1 yi,j-1(Vj-1 + Wj-1 ). Chemical Reaction: Let: Mj = molar liquid volume holdup on Stage j M = number of independent chemical reactions νi,m = stoichiometric coefficient of component i in chemical reaction m rk,m,j = chemical reaction rate, dck,m,j/dt, of the mth chemical reaction for the reference reactant component, k, on Stage j Then, the forma...
View Full Document

{[ snackBarMessage ]}

### What students are saying

• As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

Kiran Temple University Fox School of Business ‘17, Course Hero Intern

• I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

Dana University of Pennsylvania ‘17, Course Hero Intern

• The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

Jill Tulane University ‘16, Course Hero Intern