This slide covers several topic srelated to fuel chemisty.

1. Associate Engineer

3. CONTENTS
 Carbonization
 COKE
 Types of coal
 Low Temperature
Carbonization
 High Temperature
Carbonization
 Non Coking Coal
 Coking Coal

4. Carbonization is a process in which a fuel is heated
without air to leave solid porous carbon.
Carbonization is the term used to denote the heating
of coal in the absence of air. The process of
converting coal into coke is called as carbonization
of coal.

5. A coking coal is heated in the absence of air,
the porous , hard and strong residue left is
called coke.

6. Depending upon the extent of carbonization , coal
can be classified into four types as follows:
• Peat 11%
• Lignite 38% (soft coal/ brown coal)
• Bituminous 65% (household coal)
• Anthracite 90% (hard coal)

8.  Low temperature carbonization (500-700 °C) In low
temperature carbonization quantity of gaseous
product is less while liquid products are large.
 During the process, the smoke-producing compounds
are driven off as tars and oils and collected as
valuable byproducts
 Low temperature carbonization : It is done at a
temperature off about 500-700 °C. It produces semi
coke due to incomplete carbonization of coal. The
coke oven gases produced have a lower calorific
value. The tar produced is aliphatic in nature

9.  Low temperature carbonization : It is done at a
temperature off about 500-700 °C. It produces
semi coke due to incomplete carbonization of
coal. The coke oven gases produced have a lower
calorific value. The tar produced is aliphatic in
nature.
 Low temperature carbonization is used to produce
liquid fuels.

10.  High temperature carbonization (above 900°
C).
 In high temperature carbonization, the yield
of gaseous product is more than liquid
products with production of tar relatively low.
 The coke gases have a higher calorific value.
The tar produced contains more of the
aromatics and the coke obtained is denser
and less reactive

11.  A non – caking coal is that coal which when
heated in the absence of air leaves a powdery
residue.
 The non-coking coals are those coals which may
form a solid-residue but may not be suitable for
manufacture of coke.

12.  Coking coal which gives porous , hard and
strong residue after heating in the absence of
air. The residue is used for metallurgical
purposes and is known as coke.

13. REFERECES…..
 https://brainly.in/question/10648179
 https://www.mindat.org/glossary/low-
temperature_carbonization
 https://www.quora.com/What-is-the-
difference-between-coking-coal-and-non-
coking-coal
 https://www.researchgate.net/post