ELEMENTS OF CHEM. REACTION ENGR
5th Edition
ISBN: 9780135486498
Author: Fogler
Publisher: INTER PEAR
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 2, Problem 2.7P
The adiabatic exothermic irreversible gas-phase reaction
is to be carried out in a flow reactor for an equimolar feed of A and B. A Levenspiel plot for this reaction is shown in Figure P2-7B.
Figure P2-7B Levenspiel plot.
- (a) What PFR volume is necessary to achieve 50% conversion?
- (b) What CSTR volume is necessary to achieve 50% conversion?
- (c) What is the volume of a second CSTR added in series to the first CSTR (Part b) necessary to achieve an overall conversion of 80%?
- (d) What PFR volume must be added to the first CSTR (Part b) to raise the conversion to 80%?
- (e) What conversion can be achieved in a 6 × 104 m3 CSTR? In a 6 × 104 m3 PFR?
- (f) Think critically (cf. Preface, Section I, page xxviii) to critique the answers (numbers) to this problem.
Expert Solution & Answer
Learn your wayIncludes step-by-step video
schedule06:22
Students have asked these similar questions
Problem 1
Marks: 60
Section: 1a): 30 marks, Section 1b):30 marks
A laboratory scale fluidized bed is considered for studying a catalytic ozone decomposition.
a) It is requested to derive model equations under the following assumptions:
■ Operation of the catalytic reactor under steady state conditions,
There is no influence of thermal ozone decomposition reactions.
The fluidized bed includes bubbles and dense phase.
□ The dense phase can be simulated using a CSTR
The fluidized bed bubbles contain catalyst particles and can be simulated as a DSTR (batch).
□ The jets contain particles and can be simulated with a PFR.
The influence of the freeboard has to be considered using a PFR model.
The available catalytic reaction rate model is r (moles/gcat.s)= -k CA
b) Same than on a) under unsteady state conditions, using an absorbable and reactive tracer.
Note: A step-by step derivation of the model equations is required here. A quick answer will not do.
Problem 2 Marks: 40
Section 2a: 30 marks,…
Penicillin process
Penicillium chrysogenum is used to produce penicillin in a 90,000-litre fermenter. The volumetric rate of oxygen uptake by the cells ranges from 0.45 to 0.85 mmol l^−1 min^−1 depending on time during the culture. Power input by stirring is 2.9 W l^−1. Estimate the cooling requirements.
Production of bakers’ yeast
Bakers’ yeast is produced in a 50,000-litre fermenter under aerobic conditions. The carbon substrate is sucrose; ammonia is provided as the nitrogen source. The average biomass composition is CH_1.83O_0.55N_0.17 with 5% ash. Under conditions supporting efficient growth, biomass is the only major product and the biomass yield from sucrose is 0.5 g g^−1. If the specific growth rate is 0.45 h^−1, estimate the rate of heat removal required to maintain constant temperature in the fermenter when the yeast concentration is 10 g l^−1.
Chapter 2 Solutions
ELEMENTS OF CHEM. REACTION ENGR
Additional Engineering Textbook Solutions
Find more solutions based on key concepts
Give an example of a data constraint.
Database Concepts (8th Edition)
2-1 List the five types of measurements that form the
basis of traditional ptane surveying-
Elementary Surveying: An Introduction To Geomatics (15th Edition)
For the circuit shown, find (a) the voltage υ, (b) the power delivered to the circuit by the current source, an...
Electric Circuits. (11th Edition)
(Guess the Number) Write an application that plays guess the number as follows: Your program chooses the number...
Java How to Program, Early Objects (11th Edition) (Deitel: How to Program)
Course Grades In a course, a teacher gives the following tests and assignments: A lab activity that is observed...
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
Write a loop that counts the number of space characters that appear in the String object str.
Starting Out with Java: From Control Structures through Data Structures (4th Edition) (What's New in Computer Science)
Knowledge Booster
Similar questions
- Sensible energy change Calculate the enthalpy change associated with the following processes:(a) m-Cresol is heated from 25°C to 100°C(b) Ethylene glycol is cooled from 20°C to 10°C(c) Succinic acid is heated from 15°C to 120°C(d) Air is cooled from 150°C to 65°Carrow_forward▼ Enzyme conversion An immobilised enzyme process is used in an ice-cream factory to hydrolyse lactose (C12H22O11) to glucose (C6H12O6) and galactose (C6H1206): C12H22O11 + H2O →→ C6H12O + C6H12O6 Gel beads containing ß-galactosidase are packed into a column reactor; 2500 kg of lactose enters the reactor per day as a 10% solution in water at 25°C. The reactor operates at steady state and 32°C; all of the lactose is converted. Because the heat of reaction for enzyme conversions is not as great as for cell culture, sensible heat changes and heats of mixing cannot be ignored. Lactose Water Ah (kJ gmol¹) C, (cal g¹ ºC-¹) Ahm (kcal gmol¹) 3.7 -5652.5 0.30 1.0 Glucose -2805.0 0.30 5.6 Galactose -2805.7 0.30 5.6 (a) What is the standard heat of reaction for this enzyme conversion? (b) Estimate the heating or cooling requirements for this process. State explicitly whether heating or cooling is needed.arrow_forwardBacterial production of alginate Azotobacter vinelandii is investigated for production of alginate from sucrose. In a continuous fermenter at 28°C with ammonia as nitrogen source, the yield of alginate was found to be 4 g g^−1 oxygen consumed. It is planned to produce alginate at a rate of 5 kg h^−1. Since the viscosity of alginate in aqueous solution is considerable, energy input due to mixing the broth cannot be neglected. The fermenter is equipped with a flat-blade disc turbine; at a satisfactory mixing speed and air flow rate, the power requirements are estimated at 1.5 kW. Calculate the cooling requirements.arrow_forward
- Preheating nutrient medium Steam is used to heat nutrient medium in a continuous-flow process. Saturated steam at 150°C enters a coil on the outside of the heating vessel and is completely condensed. Liquid medium enters the vessel at 15°C and leaves at 44°C. Heat losses from the jacket to the surroundings are estimated as 0.22 kW. If the flow rate of medium is 3250 kg h^−1 and its heat capacity is 0.9 cal g^−1 °C^−1, how much steam is required?arrow_forwardQ3] Determine the optimal operating conditions (XA, t, and CR) in a mixed flow reactor to maximize the concentration of R (CR) in the effluent, where an aqueous feed A with an initial concentration of CA0-40 mol/m³ enters the reactor, undergoes decomposition, and exits as a mixture containing A, R, and S. K₁ AR, FR = k₁C, k₁ = 0.4 m³/(mol min) SA AS, rs = k₂CA, k₂ = 2(min), CA0 = 40 mol/m³arrow_forwardConsider the parallel decomposition of A of different orders with FR = 1, rs = 2CA and IT = C. Determine the maximum concentration of desired product obtainable in mixed flow reactor and plug flow reactor. (1) R is desired product and CA0 = 2. (2) S is desired product and CA0 = 4. R S Tarrow_forward
- 1. Copper is known to be toxic to fish, and in particular, the free ion Cu²+ species typically shows greatest toxicity. a. Calculate the speciation of Cu(II) for freshwater at a pH value of 8.3 as the hardness increases from 20 (soft) to 100 (moderately hard) to 200 (very hard) mg/L as CaCO3. Assume that the total divalent Cu(II) concentration is 10 µg/L. b. Based on your findings in part (a), do you think it is appropriate to set a single regulatory limit or should it depend on variables such as pH and hardness? Explain your answer.arrow_forwardMaterial Sciencearrow_forwardElectronic devices found in integrated circuits are composed of very high purity silicon to which has been added small and very controlled concentrations of elements found in Groups IIIA and VA of the periodic table. For Si that has had added 9.1 × 1021 atoms per cubic meter of antimony compute (a) the weight percent and (b) the atom percent of Sb present. (Hint: use Equation 100 C₁ = 1 + NAP2 N1A₁ P2 P1 (a) 0.00636 %wt (b) i 0.0182 %atarrow_forward
- Use the binary diagram, 45 line above and material balance to solve the One thousand kg/h of a (50-50 wt%) acetone-in-water solution is to be extracted at 25C in a continuous, countercurrent system with pure 1,1,2-trichloroethane to obtain a raffinate containing 10 wt% acetone. Using the following equilibrium data, determine with an equilateral-triangle diagram: a the minimum flow rate of solvent; b. the number of stages required for a solvent rate equal to 1.5 times minimum, and composition of each streamleaving each stage. Repeat the calculation of (a) and (b) if the solvent used has purity 93wt% (4wr% acetone, 3wt% water impurities) acetone 0.6 water 0.13 1,1,2-trichloroethane 0.27 Raffinate. Weight Fraction Acetone Extract. Weight Fraction Acetone 0.5 0.04 0.46 0.44 0.56 0.4 0.03 0.57 0.29 0.40 0.3 0.02 0.681 0.12 0.18 0.2 0.015 0.785 0.0 0.0 0.1 0.01 0.89 0.55 0.35 0.1 0.5 0.43 0.07 0.4 0.57 0.03 0.3 0.68 0.02 0.2 0.79 0.01 0.1 0.895 0.005arrow_forwardMaterial Sciencearrow_forwardMaterial Sciencearrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Introduction to Chemical Engineering Thermodynami...Chemical EngineeringISBN:9781259696527Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark SwihartPublisher:McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind...Chemical EngineeringISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY
Elements of Chemical Reaction Engineering (5th Ed...Chemical EngineeringISBN:9780133887518Author:H. Scott FoglerPublisher:Prentice Hall
Industrial Plastics: Theory and ApplicationsChemical EngineeringISBN:9781285061238Author:Lokensgard, ErikPublisher:Delmar Cengage Learning
Unit Operations of Chemical EngineeringChemical EngineeringISBN:9780072848236Author:Warren McCabe, Julian C. Smith, Peter HarriottPublisher:McGraw-Hill Companies, The
Introduction to Chemical Engineering Thermodynami...
Chemical Engineering
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:McGraw-Hill Education
Elementary Principles of Chemical Processes, Bind...
Chemical Engineering
ISBN:9781118431221
Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:WILEY
Elements of Chemical Reaction Engineering (5th Ed...
Chemical Engineering
ISBN:9780133887518
Author:H. Scott Fogler
Publisher:Prentice Hall
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:9781285061238
Author:Lokensgard, Erik
Publisher:Delmar Cengage Learning
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:9780072848236
Author:Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:McGraw-Hill Companies, The