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QUIZZES

304S17Collection

QDI

QUIZ 1: Calculate flow quantities

• (1)… For a PFR, given v0= 10 liter/min, CA0= 0.8 mol/liter

• Find (a) FA0 = ? (mol/min)• (b) if t = 5 min, how much A has entered the

reactor ? (in moles)• (c) If CAf (final) = 0.08 mol/liter, what is XA?

Q1: ANS

• (1).. 8 mol/min

• (2).. 40 mol

• (3).. X = 0.9

QUIZ 2: Calculate flow quantities

• (1)… For a CSTR, given FA0= 0.4 mol/s, XAf= 0.80

• Find (a) if v0 = 0.3 m^3/s, what is CA0? (mol/m^3)

• (b) if t = 13 s, what is NA0 = ? (mol)

• (c) What is CAf (final) = at XA= 0.80? (Note that v(t)=v0 is constant!)

Pas fait!

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QUIZ 3:For the same reaction as Example 1.1 above ODIPDG

• If CAf= 0.03 CA0, find the final volume of the PFR reactor.

Homework #2.8 due April 14th (Thursday)! (Postponement!!!)

Pas fait!

QUIZ 4:For the same reaction above

ODI• If CAf= 0.03 CA0, find the final volume of

the PFR reactor.

Ans: 152 L

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QUIZ 5:If the reaction is second order

• -rA = kCA2

• at same k (=0.23 (mol*dm3*min)-1, and v0(=10 dm3/min)

• Find the volume Vf of the PRF when • CA0=1.0 mol/L• and CAf= 0.03 mol/L.• FA0= CA0 *v0. Ans: 1405.65 L

Quiz 6: Find parameters ε, δ, Θ

• For the ammonia reaction in PFR• A B C• N2 + 3 H2 �� 2 NH3

• FA0=3, FB0= 12, FC0 =0 (in mol/min)

• At T0=750K, = 100 Liters/min. • (Units CA0, CB0 = moles/liter. CA0= yA0* P0/(RT0))• Final Tf= 850K. Xf = 0.25, Pf = 100 atm.• Find CAf, CBf, FAf, FBf and ε, δ, Θ.

• (R= 0.08205 atm-Liter/(K.mol) )

0v&

QDT

Pas fait!

QUIZ 7: find δ for each reaction

Ans: δ = 11

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QUIZ 8: For Example 4.2QDY

Ans. 131.55 ft3

Example 4.2p.163

QUIZ 9: For the same problem (EG. 4.3) at T= 1150 K and X = 0.7, find the PFR volume V!

QDa

Ans. 13.3 ft3

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EG.4.3 <171>

Quiz 9:T=1150K, Xf =0.7

Hints:Now: X = 0.7

Find k2:Now: T2 = 1150 K

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QUIZ 10: Use example 8.3 data to calculate the Levenspiel plot “FA0/(-rA)” value at X= 0.4

FA0 = (0.9)(163 kmol/h)

CA0 = 9.3 mol/liter

QEK

Numerical integration: Simpon’s 3/8 rule + Simpson 1/3 rule

(3/8)h(1 3 3 1) (h/3)(1 4 1)

QUIZ 11:The liquid-phase irreversible reaction

• A � B+ C• is carried out in a CSTR. To learn the rate law the

volumetric flow rate, v0 (hence τ = V l v0 ) is varied and the effluent concentrations of species A recorded as a function of the space time τ .

• Pure A enters the reactor at a concentration of 2 mol/dm3. Steady-state condition exists when the measurements are recorded.

• Determine the reaction order and specific reaction rate .

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Hints:QUIZ:

P = 162 kPaT= 1035 KMW = 58

12:

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QUIZ 13:The liquid-phase irreversible reaction

• A � B+ C• is carried out in a CSTR. To learn the rate law the

volumetric flow rate, v0 (hence τ = V l v0 ) is varied and the effluent concentrations of species A recorded as a function of the space time τ .

• Pure A enters the reactor at a concentration of 2 mol/dm3. Steady-state condition exists when the measurements are recorded.

• Determine the reaction order and specific reaction rate .

Hints:QUIZ 14:The liquid-phase irreversible reaction

• A � B+ C• is carried out in a CSTR. To learn the rate law the

volumetric flow rate, v0 (hence τ = V l v0 ) is varied and the effluent concentrations of species A recorded as a function of the space time τ .

• Pure A enters the reactor at a concentration of 2 mol/dm3. Steady-state condition exists when the measurements are recorded.

• Determine the reaction order and specific reaction rate .

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Hints: QUIZ 15: Find Xe & Tadia

• For the same problem (EG.8.6, p.513), except the entry feed temperature is now: T0 = 310 K.

• Find the new Xe and Tadia (K).

• Hints: Make a new table and plot on the graph (at right) to estimate Tadia.

QEY

Old table !!!

QUIZ 15: Find Xe & Tadia QEY

Old table !!!

Express Xe

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From Energy-Bal. Excel: Use Goal seek

QEe QUIZ 15Answer340S17 5-25KQ

T0(K)= 310T(K) Ke Xe XEB DeltaX

410 9.8278 0.9076 0.25 0.6576420 5.4775 0.8456 0.275 0.5706430 3.137 0.7583 0.3 0.4583440 1.8426 0.6482 0.325 0.3232450 1.1083 0.5257 0.35 0.1757460 0.6815 0.4053 0.375 0.0303470 0.4278 0.2996 0.4 -0.1004480 0.2738 0.215 0.425 -0.21490 0.1785 0.1514 0.45 -0.2986500 0.1183 0.1058 0.475 -0.3692510 0.0797 0.0739 0.5 -0.4261520 0.0546 0.0517 0.525 -0.4733530 0.0379 0.0365 0.55 -0.5135540 0.0266 0.0259 0.575 -0.5491550 0.019 0.0186 0.6 -0.5814560 0.0137 0.0135 0.625 -0.6115570 0.01 0.0099 0.65 -0.6401

GoalSeek 462.2 0.613 0.38 0.381 -7E-04

QEe