Coal Heating Values

Reference data and engineering information about coal heating values for material properties applications.

coalheatingvalues

Overview

Engineering reference data for Coal Heating Values in material science and properties.

Key Formulas

Stress

$\sigma = \frac{F}{A}$

Force per unit area.

Strain

$\varepsilon = \frac{\Delta L}{L_0}$

Change in length per original length.

Hooke's Law

$\sigma = E \varepsilon$

Stress proportional to strain in elastic region.

Thermal Expansion

$\Delta L = \alpha L_0 \Delta T$

Length change due to temperature.

Variables

Symbol	Description	Unit
$\sigma$	Stress	Pa
$\varepsilon$	Strain	—
$E$	Young's modulus	Pa
$\alpha$	Thermal expansion coefficient	1/°C
$\Delta T$	Temperature change	°C

Coal Heating Values by Grade

10 rows

Approximate lower heating values (LHV) of standard coal grades.
Coal Grade	Heating Value(Btu/lb)	Heating Value(kJ/kg)
Anthracite	12910	30080
Semi-Anthracite	13770	32084
Low-volatile bituminous	14340	33412
Medium-volatile bituminous	13840	32247
High-volatile bituminous A	13090	30499
High-volatile bituminous B	12130	28262
High-volatile bituminous C	10750	25047
Sub-bituminous B	9150	21319
Sub-bituminous C	8940	20830
Lignite	6900	16077

Source: engineeringtoolbox.com

Coal Grade Descriptions

Anthracite: Very shiny, hard black coal with high carbon content and energy density. Repels moisture. Used for domestic and industrial applications, including as smokeless fuel.
Bituminous: Softer and shiny, with a moisture content of 8-20%. Can be coking coals. Volatile matter ranges from 16% to 40%. Used for thermal or metallurgical applications.
Sub-bituminous: Soft and black, with lower energy density than bituminous coal. Most common type for electricity generation.
Lignite: Light brown with high moisture content and low energy density. Used mainly for electricity generation.

Interactive Charts

Coal - Classification

References

Original Source

Source: engineeringtoolbox.com