CO2 solubility in physical IL Estimate the amount of CO2 in kg that can be absorbed into 1,000 kg of IL at 2 MPa and 300 K using the Carvalho and Coutinho [12] model.

Question

[latex]CO_{2}[/latex] solubility in physical IL
Estimate the amount of [latex]CO_{2}[/latex] in kg that can be absorbed into 1,000 kg of IL at 2 MPa and 300 K using the Carvalho and Coutinho [12] model.

Accepted Answer

From Eq. (12.60) we can get
[latex]P=m^{0}_{i} imes \exp \left(6.8591 - \frac{2004.3}{T} ight)[/latex] (12.60)
[latex]m^{0}_{i}=\frac{P}{\exp \left(6.8591 - \frac{2004.3}{T} ight)}=\frac{2}{\exp \left(6.8591 - \frac{2004.3}{300} ight)}[/latex]
[latex]= 1.6742(mole CO_{2}/kg IL)[/latex]

The molar weight of [latex]CO_{2}[/latex] is 44 g/mole, and that gives the solubility as
[latex]c_{CO_{2}} = 1.6742 × 0.044(kg CO_{2}/kg IL) = 0.07357 (kg CO_{2}/kg IL)[/latex]

As seen in the result of this example, [latex]CO_{2}[/latex] solubility is low in ILs, which means extremely high cost is needed to use ILs to absorb [latex]CO_{2}[/latex] from industrial sources.

Question 12.4: CO2 solubility in physical IL Estimate the amount of CO2 in ...

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