[Sreeni]

Kindly say as to which among the following is apt for scrubbing carbon dioxide considering all the below mentioned parameters...

       * cost
       * availability
       * dissociation constant
       * effectiveness in removal  - solubility
       * molecular mass - so that mass of a system may be minimised having optimum values for all other parameters

Chemicals : Lithium hydroxide, Sodium hydroxide or Calcium hydroxide

 

[Borek]

You have to show your attempts at solving the question to receive help. This is a forum policy.

[Sreeni]

Yes.

Calcium hydroxide is the cheapest, but low solubility and lithium hydroxide is costly, has low solubility compared to sodium hydroxide but low molecular mass and is used for scrubbing in spacecrafts.

I am a Chemical Engineering student. I am giving a prosposal and would like to know which can be used for optimisation.

[mbeychok]

Sreenivasan:

Have you considered the use of an aqueous amine solution? For example, monoethanol amine (MEA) or diethanol amine (DEA) which are commonly used in industry for removal of CO2 from gases??

See this article in the Citizendium online encyclopedia: click here ==> Amine gas treating