Chapter 9, Problem 9.12P

Interpretation Introduction

(a)

Interpretation:

Taking a basis of 1 mol of feed gas, the moles of each component of the feed product mixture and extent of reaction should be calculated.

Concept Introduction

The flow chart for the given situation would be helpful to solve the problem.

Interpretation Introduction

(b)

Interpretation:

First, the calculation of the standard heat of the isomerization reaction (kJ) should be found. Then, taking the feed and product species at 25? as references, an inlet-outlet enthalpy table should be prepared and component amounts (mol) and specific enthalpies (kJ/mol) should be calculated and filled in.

Concept introduction:

The standard heat of formation will be helpful to solve the problem as:

$\Delta H_r^0=\Delta H_f^0{}_{(i-butane)}-\Delta H_f^0{}_{(n-butane)}$

Interpretation Introduction

(c)

Interpretation:

The amount of heat transferred should be calculated in kJ and the required heat transfer for a reactor feed of 325 kJ/h should be determined in kW.

Concept introduction:

The heat transferred is calculated using formula:

$Q=\Delta H=\xi [\Delta H_r^0+\sum {}_{out}{n}_i{H}_i-\sum {}_{in}{n}_i{H}_i]$

Interpretation Introduction

(d)

Interpretation:

The calculated results should be used to estimate the heat of the isomerization reaction at 149? and the assumptions built into the estimation should be listed.