Irreversible reaction

Reduction of the blown-out iodine by sulfur dioxide (T-202)

I2+SO2+2H2O2HI+H2SO4

Direction
Irreversible
Processes
1
Stated as
Fixed conversion
Heat of reaction
ΔH = -213,600 kJ/kmol (one process)
Element balance
Checked: balances
As the processes state itStoichiometry, conversions, heats of reaction and catalyst windows are taken from each process's files with their provenance. The build checks only that each process's equation balances in every element, from the process's own component formulas; it does not check the numbers. A process's design maturity applies to them.

Species

SpeciesNameCASRoleCoefficient
I2Iodine7553-56-2reactant-1
SO2Sulfur dioxide7446-09-5reactant-1
H2OWater7732-18-5reactant-2
HIHydrogen iodide10034-85-2product2
H2SO4Sulfuric acid7664-93-9product1

In the processes

  • Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a)Concept · not reviewed

    ABS · Reduction of the blown-out iodine by sulfur dioxide (T-202)I2(g) + SO2(g) + 2 H2O(l) → 2 HI(aq) + H2SO4(aq)

    Stated as
    Fixed conversion
    Phase
    mixed
    Element balance
    Balances in every element
    Conversion
    99.5 % of I2 (assumed: D-005: absorption of 99.5 % of the iodine entering the HI/H2SO4 absorber (absorber and SO2 reduction: US 2013/0243684 A1 and US 4,282,324 backgrounds; the fraction is ASSUMED))
    Heat of reaction
    ΔH = -213,600 kJ/kmol at 298.15 K, as written (assumed: I2(g) 62.4, SO2(g) -296.8, H2O(l) -285.8, I-(aq) -55.2, SO4(2-)(aq) -909.3 kJ/mol (NBS tables, D-007))

Sources

What the processes cite for this reaction, each source once: for the reaction itself, its conversion, its heat of reaction or its catalyst. As the processes write them; DOIs, US patent numbers and web addresses are linked.

  1. D-005: absorption of 99.5 % of the iodine entering the HI/H2SO4 absorber (absorber and SO2 reduction: US 2013/0243684 A1 and US 4,282,324 backgrounds; the fraction is ASSUMED)

    For the conversion · cited by Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a)

  2. I2(g) 62.4, SO2(g) -296.8, H2O(l) -285.8, I-(aq) -55.2, SO4(2-)(aq) -909.3 kJ/mol (NBS tables, D-007)

    For the heat of reaction · cited by Iodine from natural iodide brine by chlorine oxidation, air blowing-out and SO2 absorption (1000 t/a)