Chapter 9, Problem 9.14P

Interpretation Introduction

(a)

Interpretation:

A labeled flow chart should be drawn and all the material balance calculations needed to determine the amounts (lb-mole) of each feed and product stream component should be performed.

Concept Introduction

The flow chart will be drawn on the basis of given information of reaction:

$\begin{array}{c}F{e}_2{O}_3\left(s\right)+3C\left(s\right)\to 2Fe\left(s\right)+3CO\left(g\right)\\ \Delta H_r\left(77℉\right)=2.111\times {10}^5\frac{Btu}{lb}-mol\end{array}$

Interpretation Introduction

(b)

Interpretation:

Taking the reactant and product species at 77^o F as references, an inlet-outlet enthalpy table should be prepared and component amounts (mol) and specific enthalpies (Btu/lb-mol) should be calculated and filled in.

Concept introduction:

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

$\Delta H_r^0=\Delta H_f^0{}_{(product)}-\Delta H_f^0{}_{(reac\tan t)}$

Interpretation Introduction

(c)

Interpretation:

The furnace heat requirement should be estimated in Btu/ton Fe produced.

Concept introduction:

Furnace heat requirement is determined by the formula:

$Q=\frac{n_{Fe}\Delta H_r}{v_{Fe}}+\sum {}_{out}{n}_i{H}_i-\sum {}_{in}{n}_i{H}_i]$

Interpretation Introduction

(d)

Interpretation:

The assumptions should be listed who made the value calculated in part(c) in which one of the assumption has something to do with the reactor pressure.