The traditional fossil fuels in particular petroleum, natural gas,
and coal have been continuously used globally for the past few
hundred years. The demand towards energy continues to increase
year by year. As a result, biodiesel has drawn special attention from
researchers as a potential alternate fuel for current petroleumbased
fossil fuel due to the depletion of the oil reserves. Biodiesel
is one kind of renewable fuel consists of fatty acid methyl esters
(FAME). It is produced through transesterification of edible and
non-edible vegetable oils, animal fat as well as waste cooking oil
from the food industry. Apart from sustainability, biodiesel also
presents some superior properties over fossil fuels: non-toxic,
biodegradable, good combustion efficiency and environmentally
friendly [1,2]. In the following paragraphs, a brief overview on
the biodiesel production via various type of catalysts used is first
mentioned leading to the use of heterogeneous catalyst including
egg shells for biodiesel production.