Abstract:
Efficient CO2 mitigation techniques will become
increasingly demanding due to environmental issues.
There are many sources which release CO2 and
combustion of fossil fuel plays the major role. Coal
fired power plants are the most prominent CO2
emitting source today. The main purpose of this
study is to understand the solvent’s effect on CO2
removal efficiency for power plant flue gas treating.
Four different types of solvents are taken into
consideration. MEA, Diethanolamine (DEA),
Diglycolamine (DGA) and Methyldiethanolamine
(MDEA) are applied as solvent for capturing
processes. A coal fired flue gas removal process is
implemented in to Aspen Plus. The solvent strength
and lean loading are considered as most relevant
factors for analyzing. With the variation of these
factors, efficiency of CO2 removal from power plant
flue gas is examined for different solvents. The four
different solvents have unique optimum conditions
such as; concentration, lean loading and solvent
temperature, for highest removal efficiency. The
suitable concentrations for MEA, DEA and MDEA
are normally around 20-30wt%, however, DGA can
be used as higher concentration solvent for CO2
removal. MDEA has low heat of regeneration and
maximum loading capacity as well as less corrosive
effect than MEA.
