THE 3
rd
INTERNATIONAL SCIENTIFIC CONFERENCES OF STUDENTS AND YOUNG RESEARCHERS
dedicated to the 99
th
anniversary of the National Leader of Azerbaijan Heydar Aliyev
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placed in the absorption chamber and heated to a predetermined
temperature. To eliminate the air from the experimental instrument, the entire
system was evacuated to a vacuum. We cleaned again, waited 5-10 minutes,
and repeated the process 3-5 times until the instrument display data no
longer changed. After reaching the preset pressure, the valve was closed,
and the original pressure was recorded while the pressure on the monitor
remained steady. Then, with the magnetic stirrer turned on, the combination
solution began to absorb the gas. When the pressure reading remained
stable and unchanging for 40 minutes, the system was said to have attained
equilibrium absorption, and the equilibrium pressure was measured. The
solution was put in the vacuum chamber for 120 minutes following the
absorption experiment.
An efficient environmental CO2 absorbent, TWEEN 80–[emim] [OTf]–
water combination solution, was obtained after tests and careful
comparisons. The absorption capacity of the absorbent reached 0.798 mol/l
at an indoor temperature under low pressure, which was equivalent to the
effect of alkanol amine solution. The absorption data of the combined
solution was in accordance with Henry’s law and Langmuir equation. The
standard error was in the range of 3.7–5.1% for Henry’s law with an R-square
of 97%. The standard error was between 1.9% and 8.9%, and the R-square
was 99% for the Langmuir equation. Both results showed the accuracy of the
absorption data. The TWEEN 80–[emim] [OTf]–water combination solution
with the advantages of good reproducibility, low cost, low viscosity, and low
consumption compared with ionic liquids. It could be used again after
decomposition and regeneration and was expected to become a new kind of
absorbent for CO2.
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