Elementary Principles Of Chemical Processes
Elementary Principles Of Chemical Processes
4th Edition
ISBN: 9781119254003
Author: Richard M. Felder And Ronald W. Rousseau
Publisher: WILEY
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Chapter 9, Problem 9.28P
Interpretation Introduction

(a)

Interpretation:

The inlet-outlet enthalpy table for the given process is to be prepared and filled using elemental species as reference. Also, the required heat transfer to the reactor is proven to be 2.7×106 kJ.

Concept introduction:

Specific heat capacity (Cp) of a substance is the amount of heat needed for a unit mass of substance to raise its temperature by 1C. It is temperature dependent and varies with temperature of the substance.

Specific enthalpy (H^) of any substance at temperature TC is given by:

H^=TrefTCpdT   .......(1)

Here, Tref is the reference temperature taken for the calculations. And the formula to calculate Cp is:

Cp=(a×103)+(b×105)T+(c×108)T2+(d×1012)T3   .......(2)

The equation for energy balance is:

ΔH+ΔEk+ΔEp=QWs   .......(3)

Here, ΔH is the change in the enthalpy of the system, ΔEk is the kinetic energy change of the system, ΔEp is the potential energy change of the system, Q is the amount of the energy which is transferred to a system and Ws is the amount of energy which is transferred as shaft work.

Interpretation Introduction

(b)

Interpretation:

The inlet-outlet enthalpy table for the given process is to be prepared and filled using elemental species as reference. Also, the required heat transfer to the reactor is to be calculated.

Concept introduction:

Specific heat capacity (Cp) of a substance is the amount of heat needed for a unit mass of substance to raise its temperature by 1C. It is temperature dependent and varies with temperature of the substance.

Specific enthalpy (H^) of any substance at temperature TC is given by:

H^=TrefTCpdT   .......(1)

Here, Tref is the reference temperature taken for the calculations. And the formula to calculate Cp is:

Cp=(a×103)+(b×105)T+(c×108)T2+(d×1012)T3   .......(2)

The equation for energy balance is:

ΔH+ΔEk+ΔEp=QWs   .......(3)

Here, ΔH is the change in the enthalpy of the system, ΔEk is the kinetic energy change of the system, ΔEp is the potential energy change of the system, Q is the amount of the energy which is transferred to a system and Ws is the amount of energy which is transferred as shaft work.

Interpretation Introduction

(c)

Interpretation:

The percentage by which the heat requirement is reduced for the modified process in part (b) is to be calculated. Also, two reasons are to be stated for this reduction along with the benefits of feeding the combustion gas to the calcination reactor.

Concept introduction:

The formula to calculate the percentage reduction is:

% reduction=Initial valuereduced valueInitial value×100%   .......(4)

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Chapter 9 Solutions

Elementary Principles Of Chemical Processes

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...
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