The SO2 solubility at various temperatures and pressures was evaluated to determine the SO2 content in a 50 wt % H2SO4 acid solution adding new experimental solubility data for the SO2 H2SO4 binary system currently available in literature. A setup was designed and commissioned to measure the SO2 solubility at temperatures ranging from 30 deg C to 80 deg C and pressures up to 1000 kPa in 50 wt % H2SO4. SO2 solubility measurements in water were used to benchmark the accuracy of the setup. According to the results, the solubility of SO2 in 50 wt % H2SO4 decreased with increasing temperature despite the increase in the system pressure found at higher temperatures. The highest amount of SO2 soluble in 50 wt % H2SO4 was attained at 30 deg C and 3.658 kPa with 13.11 g of SO2 per 100 g of H2SO4 solution. A heat of solution of -36 kJ*mol 1 (uncertainty u(?H) = 5 kJ*mol 1) was determined.
Compounds
#
Formula
Name
1
O2S
sulfur dioxide
2
H2O
water
3
H2O4S
sulfuric acid
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.