Answer to Question #288376 in General Chemistry for Ali

Question

In chemical engineering it is often necessary to make estimates

using incomplete data. Estimate the relative effective capacity of

the following two liquids for absorbing carbon dioxide: (a)

monoethanolamine solution (20 per cent by weight), and (b)

water at various pressures. The MEA absorptive capacity is in

practice limited to 0.35 moles of carbon dioxide per mole of

amine. The solubility of carbon dioxide in water at 20°C is about

0.039 mollitre- 1 bar.

Answer 1

Monoethanolamine minimizes the energy consumption and improve the absorption efficiency of CO2.

CO2 absorbing capacity of MEA is concentration dependent, logarithmically approaching the nominal absorbing capacity of 720gCO2/kg MEA at low concentrations.