Kinetics and Reactor Design

QUIZZES

CHE 304Spring 2016

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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 ? (mol)

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

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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!)

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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!!!)

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QUIZ :Levenspiel Plot (Example 2.2)

• Use the kinetics data from example 2.2 to construct a Levelspiel plot.

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Kinetics Data:The following is the measured kinetics data for the reaction

A ���� B (from a chemistry lab).

QUIZ 2: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.

Quiz: 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= P0/(RT0))• Final Tf= 850K. X = 0.35.• Find Pf (bar), CAf, CBf, FAf, FBf and ε, δ, Θ.

• (R= 0.08314 bar-Liter/(K.mol) )

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QUIZ: find δ for each reaction

4: EG 4.2,PEC

For Example 4.2 <163>: CSTR producing Eth-Glycol

Example 4.2p.163

QUIZ• PEP

QUIZ: <484>PEQ

• Example 8-2 Heat of Reaction• Calculate the heat of reaction for the

synthesis of ammonia from hydrogen + nitrogen at 250oC in kcal/mol of N2 reacted and also in kJ/mol of H2 reacted.

• Calculate the heat of reaction at the reference temperature TR using the heats of formation of the reacting species obtained from Perry's Handbook or the Handbook of Chemistry and Physics.

Q: If the heat capacities are constant:

Q:

• ∆HRX(T=250oC) = ∆HRX(TR)+ ∆Cp*(T-TR)

QUIZ• PEP

QUIZ: <484>PEQ

• Example 8-2 Heat of Reaction• Calculate the heat of reaction for the

synthesis of ammonia from hydrogen + nitrogen at 250oC in kcal/mol of N2 reacted and also in kJ/mol of H2 reacted.

• Calculate the heat of reaction at the reference temperature TR using the heats of formation of the reacting species obtained from Perry's Handbook or the Handbook of Chemistry and Physics.

Q: If the heat capacities are constant:

Q:

• ∆HRX(T=250oC) = ∆HRX(TR)+ ∆Cp*(T-TR)

QUIZ• PEQ

QUIZ: 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

QUIZ• PEQ

QUIZ: 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

Answers to Homework

4

Homework 4.6

Answer to Homework 4.6

Homework 4.7

Use Polymath: PFR

CSTR

Polymath:4.7 (a) Report

Polymath: 4.7 (a) ODE