Steady state experiments were conducted in a continuous well stirred reactor to understand the absorp-
tion
rate of SO2/CO2 into a total concentration of 0.28 M of mixtures of NaHSO3 and NaHCO3 simulating
liquids
formed
by
scrubbers
using
NaOH
as
the
reagent
at
solution
pH
values
from
4
to
7
with
the
exiting
gas concentrations of
SO2 from 19 ppm to 1500 ppm and a constant CO2 concentration of 70%. Online
measurement included gas phase SO2 and liquid pH, and offline measurement included CO2 (aq), HCO3
−,
S (IV), SO3
2− and S (VI) after each experiment. Three aspects investigated were the impacts of pH on
the solution chemistry, the significance of solution pH and the concentration of gas phase SO2 on the
absorption rate of SO2.