EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
EBK ELEMENTARY PRINCIPLES OF CHEMICAL P
4th Edition
ISBN: 9781119192107
Author: BULLARD
Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT
Question
Book Icon
Chapter 9, Problem 9.19P
Interpretation Introduction

(a)

Interpretation:

To interpret the average power usage (kW) per household and also estimate the number of apartment units that could be powered with the 13kW fuel cell.

Concept introduction:

The fuel cell operates at voltage of 26volts and current of 500amps and has maximum power of 13kW. A single cell operates at 0.7volts. A fuel cell is an electrochemical device which produces direct current (DC) electricity by reacting Hydrogen (H2) with available Oxygen (O2) in the air.

EBK ELEMENTARY PRINCIPLES OF CHEMICAL P, Chapter 9, Problem 9.19P , additional homework tip  1

Here,

n˙x= Molar Flowrate of Chemical Species x,n˙1= Molar Flowrate of Hydrogen that exits the anode,n˙2= Molar Flowrate of Oxygen that exits the cathode,n˙3= Molar Flowrate of Water that exits the cathode.

Interpretation Introduction

(b)

Interpretation:

To interpret the flowrates of Hydrogen and Air required in molsandSLPM(StdLmin)

Concept introduction:

The fuel cell operates at voltage of 26volts and current of 500amps and has maximum power of 13kW. A single cell operates at 0.7volts. Stoichiometric amount of moles of Hydrogen required

(nH2)stoich=IN2Fhere,I=CurrentinAmpN=NumberofCellsF=Faraday'sConstant=96485Coulombsmolofelectrons

The constant 2molelectronspermoloffuel which follows from the reaction at anode. The Hydrogen fed is 15% excess of this amount and the air is fed in 200% excess of amount required to consume all the Hydrogen.A fuel cell is an electrochemical device which produces direct current (DC) electricity by reacting Hydrogen (H2) with available Oxygen (O2) in the air.

EBK ELEMENTARY PRINCIPLES OF CHEMICAL P, Chapter 9, Problem 9.19P , additional homework tip  2

Here,

n˙x= Molar Flowrate of Chemical Species x,n˙1= Molar Flowrate of Hydrogen that exits the anode,n˙2= Molar Flowrate of Oxygen that exits the cathode,n˙3= Molar Flowrate of Water that exits the cathode.

Interpretation Introduction

(c)

Interpretation:

Determine the molar flowrate of Hydrogen exiting from the anode and the molar composition of the cathode exit gas.

Concept introduction:

The fuel cell operates at voltage of 26volts and current of 500amps and has maximum power of 13kW. A single cell operates at 0.7volts. The Mole Flowrate of Hydrogen is (n˙H2)=0.113molH2s. The Volumetric Flowrate of Hydrogen in Standard Liters per Minute is 152SLPM. The Mole Flowrate of air is (n˙Air)=0.707mols. The Volumetric Flowrate of air in Standard Liters per Minute is 951SLPM.

The constant 2molelectronspermoloffuel which follows from the reaction at anode. The Hydrogen fed is 15% excess of this amount and the air is fed in 200% excess of amount required to consume all the Hydrogen .A fuel cell is an electrochemical device which produces direct current (DC) electricity by reacting Hydrogen (H2) with available Oxygen (O2) in the air.

EBK ELEMENTARY PRINCIPLES OF CHEMICAL P, Chapter 9, Problem 9.19P , additional homework tip  3

Here,

n˙x= Molar Flowrate of Chemical Species x,n˙1= Molar Flowrate of Hydrogen that exits the anode,n˙2= Molar Flowrate of Oxygen that exits the cathode,n˙3= Molar Flowrate of Water that exits the cathode.

Interpretation Introduction

(d)

Interpretation:

To interpret the number of apartments could be safely powered with a 13kW fuel cell.

Concept introduction:

The fuel cell operates at voltage of 26volts and current of 500amps and has maximum power of 13kW. A single cell operates at 0.7volts. The Mole Flowrate of Hydrogen is (n˙H2)=0.113molH2s. The Volumetric Flowrate of Hydrogen in Standard Liters per Minute is 152SLPM. The Mole Flowrate of air is (n˙Air)=0.707mols. The Volumetric Flowrate of air in Standard Liters per Minute is 951SLPM .The molar flowrate of Hydrogen exit from the anode is 0.015molH2s. The molar composition of cathode exit gas are Oxygen=0.099molO2s&Nitrogen=0.558molN2s

The constant 2molelectronspermoloffuel which follows from the reaction at anode. The Hydrogen fed is 15% excess of this amount and the air is fed in 200% excess of amount required to consume all the Hydrogen .A fuel cell is an electrochemical device which produces direct current (DC) electricity by reacting Hydrogen (H2) with available Oxygen (O2) in the air.

EBK ELEMENTARY PRINCIPLES OF CHEMICAL P, Chapter 9, Problem 9.19P , additional homework tip  4

Here,

n˙x= Molar Flowrate of Chemical Species x,n˙1= Molar Flowrate of Hydrogen that exits the anode,n˙2= Molar Flowrate of Oxygen that exits the cathode,n˙3= Molar Flowrate of Water that exits the cathode.

Interpretation Introduction

(e)

Interpretation:

To interpret the times when battery is being charged and the minimum total energy capacity of the battery in kWhr.

Concept introduction:

The fuel cell operates at voltage of 26volts and current of 500amps and has maximum power of 13kW. A single cell operates at 0.7volts .The constant 2molelectronspermoloffuel which follows from the reaction at anode. The Hydrogen fed is 15% excess of this amount and the air is fed in 200% excess of amount required to consume all the Hydrogen .A fuel cell is an electrochemical device which produces direct current (DC) electricity by reacting Hydrogen (H2) with available Oxygen (O2) in the air.

EBK ELEMENTARY PRINCIPLES OF CHEMICAL P, Chapter 9, Problem 9.19P , additional homework tip  5

Here,

n˙x= Molar Flowrate of Chemical Species x,n˙1= Molar Flowrate of Hydrogen that exits the anode,n˙2= Molar Flowrate of Oxygen that exits the cathode,n˙3= Molar Flowrate of Water that exits the cathode.

Blurred answer
Students have asked these similar questions
please, provide me with right results
Ex. HW. A vertical glass tube, 2cm ID & 5m long in heated uniformly over its length. The water enter at (200-204 C) & 68.9 bar calculated the pressure drop if the flowrate 0.15 Kg/s & the power applied as a heat to the fluid is 100KW using the homogeneous model. Given that enthalpy at inlet temp.=0.87MJ/Kg, enthalpy saturation temp (285C)=1.26 MJ/Kg and μl=0.972*10-4 Ns/m2, μG=2.89*10-5 Ns/m2, UG=2.515*10-2m3/Kg and the change in UG over range of pressure=-4.45*10-4m3/Kg/bar.
4. An experimental test rig is used to examine two-phase flow regimes in horizontal pipelines. A particular experiment involved uses air and water at a temperature of 25°C, which flow through a horizontal glass tube with an internal diameter of 25.4 mm and a length of 40 m. Water is admitted at a controlled rate of 0.026 kgs at one end and air at a rate of 5 x 104 kgs in the same direction. The density of water is 1000 kgm³, and the density of air is 1.2 kgm. Determine the mass flow rate, the mean density, gas void fraction, and the superficial velocities of the air and water. Answer: 0.02605 kgs 1, 61.1 kgm³, 0.94, 0.822 ms-1, 0.051 ms-1

Chapter 9 Solutions

EBK ELEMENTARY PRINCIPLES OF CHEMICAL P

Ch. 9 - Prob. 9.11PCh. 9 - Prob. 9.12PCh. 9 - In the production of many microelectronic devices,...Ch. 9 - Prob. 9.14PCh. 9 - Prob. 9.15PCh. 9 - Prob. 9.16PCh. 9 - Prob. 9.17PCh. 9 - Carbon monoxide at 25°C and steam at 150°C are fed...Ch. 9 - Prob. 9.19PCh. 9 - Prob. 9.20PCh. 9 - Ethyl alcohol (ethanol) can be produced by the...Ch. 9 - Prob. 9.22PCh. 9 - Prob. 9.23PCh. 9 - Prob. 9.24PCh. 9 - Formaldehyde is produced commercially by the...Ch. 9 - Prob. 9.26PCh. 9 - Prob. 9.27PCh. 9 - Prob. 9.28PCh. 9 - Prob. 9.29PCh. 9 - A gas mixture containing 85 mole% methane and the...Ch. 9 - Ethylene oxide is produced by the catalytic...Ch. 9 - Cumene (C6H5C3H7) is produced by reacting benzene...Ch. 9 - Ethylbenzene is converted to styrene in the...Ch. 9 - Prob. 9.34PCh. 9 - Prob. 9.35PCh. 9 - Prob. 9.36PCh. 9 - Prob. 9.37PCh. 9 - Coke can be converted into CO—a fuel gas—in the...Ch. 9 - Prob. 9.39PCh. 9 - Prob. 9.40PCh. 9 - Prob. 9.41PCh. 9 - The equilibrium constant for the ethane...Ch. 9 - You are checking the performance of a reactor in...Ch. 9 - Hydrogen is produced in the steam reforming of...Ch. 9 - Prob. 9.45PCh. 9 - Five cubic meters of a 1.00-molar aqueous sulfuric...Ch. 9 - Prob. 9.47PCh. 9 - Prob. 9.48PCh. 9 - Prob. 9.49PCh. 9 - Calcium chloride is a salt used in a number of...Ch. 9 - A dilute aqueous solution of sulfuric acid at 25°C...Ch. 9 - A 2.00 mole% sulfuric acid solution is neutralized...Ch. 9 - A 12.0-molar solution of sodium hydroxide (SG =...Ch. 9 - Citric acid (C6H8O7) is used in the preparation of...Ch. 9 - Ammonia scrubbing is one of many processes for...Ch. 9 - Various uses for nitric acid are given in Problem...Ch. 9 - A natural gas is analyzed and found to consist of...Ch. 9 - Prob. 9.58PCh. 9 - A fuel gas is known to contain methane, ethane,...Ch. 9 - A fuel gas containing 85.0 mole% methane and the...Ch. 9 - A mixture of air and a fine spray of gasoline at...Ch. 9 - The heating value of a fuel oil is to be measured...Ch. 9 - Methanol vapor is burned with excess air in a...Ch. 9 - Methane at 25°C is burned in a boiler furnace with...Ch. 9 - Methane is burned completely with 40% excess air....Ch. 9 - A gaseous fuel containing methane and ethane is...Ch. 9 - A coal contains 73.0 wt% C, 4.7% H (not including...Ch. 9 - A mixture of methane, ethane, and argon at 25°C is...Ch. 9 - Prob. 9.69PCh. 9 - Prob. 9.70PCh. 9 - Prob. 9.71PCh. 9 - A bituminous coal is burned with air in a boiler...Ch. 9 - Prob. 9.73PCh. 9 - A natural gas containing 82.0 mole% CH4and the...Ch. 9 - Prob. 9.75PCh. 9 - Liquid n-pentane at 25°C is burned with 30% excess...Ch. 9 - Methane is burned with 25% excess air in a...Ch. 9 - Methane and 30% excess air are to be fed to a...Ch. 9 - Prob. 9.79PCh. 9 - In Problem 9.79, the synthesis of methanol from...Ch. 9 - Natural gas that contains methane, ethane, and...Ch. 9 - Prob. 9.82PCh. 9 - The wastewater treatment plant at the Ossabaw...
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
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
Text book image
Elementary Principles of Chemical Processes, Bind...
Chemical Engineering
ISBN:9781118431221
Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:WILEY
Text book image
Elements of Chemical Reaction Engineering (5th Ed...
Chemical Engineering
ISBN:9780133887518
Author:H. Scott Fogler
Publisher:Prentice Hall
Text book image
Process Dynamics and Control, 4e
Chemical Engineering
ISBN:9781119285915
Author:Seborg
Publisher:WILEY
Text book image
Industrial Plastics: Theory and Applications
Chemical Engineering
ISBN:9781285061238
Author:Lokensgard, Erik
Publisher:Delmar Cengage Learning
Text book image
Unit Operations of Chemical Engineering
Chemical Engineering
ISBN:9780072848236
Author:Warren McCabe, Julian C. Smith, Peter Harriott
Publisher:McGraw-Hill Companies, The