Vargheese, Vibin
(2016)
Catalytic depolymerzation of lignin over HZSM5.
Masters thesis, Indian Institute of Technology Hyderabad.
Abstract
The situation around the globe is changing dramatically. There are many factors
political and climate change that are affecting the rate of consumption of fossil
fuel, Nowadays the consumption of the fossil fuels have reached a critical
level
which challenges there existence for the consumption of future generation
simultaneously having an adverse effect towards the society and our
environment. So here we are focusing our interest towards the economical use of
Lignin, which is one of the
primary by product from bio refinery and paper,
and
pulp industry, it is composed of complex aromatic
compounds
. Thus If we are able
to break it to monomeric units then
these
compounds can be utilized as a source
of industrial chemical from an bio refinery
, reducing our dependence towards the
fossil fuel. Here we have studied the
catalytic depolymerisation of lignin using
HZSM 5 as our catalyst, under different
parameters
of temperature,
pressure
and
with different solvent like methanol, ethanol, butanol, i
so propanol.
A detailed
analysis of the products was
conducted.
We have achieved to produce benzene,
xylene, catechol, cresol, phenol and guaiacol via our reaction. Simultaneously
maintaining more than 95% conversion in most of the reaction, with minimal
amount of char formation.
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