Abstract:
Flue gas containing carbon dioxide is released into the atmosphere at Attock
Refinery Limited from the heater which is used to heat process fluids. All of the
flue gases are released without any treatment which further aggravates
environmental concerns. Our project focuses on capturing and storage of
carbon dioxide which is a greenhouse gas and a major proponent of global
warming. In order to capture carbon dioxide, we have used two technologies:
membrane separation and amine absorption.
Membrane separation offers an alternative technology for gas separation
because of its simplicity, high energy efficiency, cost competitiveness, small
footprint and environmental compatibility compared to pressure swing
adsorption and cryogenic distillation. In our case we have discussed some
properties and results of CO2 capturing using a basic polyethersulfone
membrane.
Amine absorption technology uses Monoethanolamine (MEA) which has affinity
towards carbon dioxide. This section consists of two main sections; the
absorption column and the stripping column. The absorption column allows the
carbon dioxide to bind with MEA and the stripping sections facilitates in
breaking of the MEA-CO2 bond. The CO2 exiting the stripper from the top can
then be captured and stored
