Chapter 9, Problem 9.58P

Interpretation Introduction

(a)

Interpretation:

To derive an expression for Higher Heating Value $\left(\text{HVV}\right)\text{in}\frac{\text{kJ}}{\text{kg}}$ of coal in terms of $\left(\text{C}\right)\text{,}\left(\text{H}\right)\text{,}\left(\text{O}\right)\text{and}\left(\text{S}\right)$ and compare it with Dulong Formula.

Concept introduction:

The heat of combustion for Carbon on a mass basis can be calculated as follows. The reaction involved is:

$\text{C}\left(\text{s}\right){\text{+O}}_{\text{2}}\left(\text{g}\right)\to {\text{CO}}_{\text{2}}\left(\text{g}\right)$.

Interpretation Introduction

(b)

Interpretation:

To estimate the value of ratio $\left(\varphi \right)$ of $\text{kg}{\text{SO}}_{\text{2}}\text{in the stack gases}$ to the $\text{kJ heating value of the fuel}$ using Dulong formula.

Concept introduction:

The ratio $\left(\varphi \right)$ of $\text{kg}{\text{SO}}_{\text{2}}\text{in the stack gases}$ to the $\text{kJ heating value of the fuel}$ using Dulong formula is as follows:

$\varphi =\frac{{\text{m}}_{{\text{SO}}_{\text{2}}}}{{\text{HHV}}_{\text{Dulong}}}$

The value of HHV for the Coal using the Dulong Formula is as follows:

${\text{HHV}}_{\text{Dulong}}\left(\frac{\text{kJ}}{\text{kg}}\right)\text{=33,801}\left(\text{C}\right)\text{+144,158}\left[\left(\text{H}\right)\text{-0}\text{.125}\left(\text{O}\right)\right]\text{+9413}\left(\text{S}\right)$

Interpretation Introduction

(c)

Interpretation:

To explain the reason behind stopping using the old practice when a new regulation was introduced.