Carbon dioxide capture by ionic liquid in a membrane contactor

Abstract

he emission of CO2 due to burning of fossil fuel results in increasing the concentration of CO2 in the
atmosphere leading towards global warming. The ionic liquid was impregnated in the lords of membrane and contacted with
flue gas containing CO2 in counter flow at different temperature, flowrates and pressure. It has been predicted that by the
end of 2030 the emission of CO2 can reached up to 40.2 Gt. Membrane technology is an emerging technology used to
capture CO2 from flue gases. The current work is focused to analyze ionic liquid for capturing for post-combustion CO2
through hydrophobic non-selective membrane in membrane contactor under low or atmospheric pressure. Slight pressure is
applied only to maintain the interface stable between feed and ionic liquid phases. The ionic liquid was impregnated in the
lords of membrane and contacted with flue gas containing CO2 in counter flow at different temperature, flowrates and
pressure. The feed gas in ratio of CO2:N2 was fed on one side of membrane while ionic liquid mixed with water in, was fed on
the other side of the membrane. It has been observed that 1-butyl-3-methyl imidazolium ρ-toluenesulfonate ([BSmim][TOS])
shows better selectivity. Moreover, as increase in flowrate and temperature showed the decrease in CO2 capture efficiency.