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[pritishkamat]

Hi, I'm in my Final Year of Bachelors in Chemical Engineering. I have a project assignment that requires me to design a plant manufacturing 100TPD of sodium metabisulfite (Na2S2O5).

In my process, the main reaction occurs in the absorption system where SO2 from SO2-containing gases is absorbed with reaction in an aqueous stream containing sodium sulfite and bisulfite.
The sulfur dioxide reacts with sulfite to yield sodium bisulfite in saturated concentration. The reaction is exothermic, irreversible, and mass transfer-controlled.

In view of this, i surmise that there's no requirement of a staged contactor (no equilibrium requirements). So ive decided to use venturi scrubbers to give me the desired kLa value.

I have the following questions:
1. what should i choose my motive (driving, primary) fluid? and what is the choice based upon?
2. how must the system be designed (gas and liquid inlets, outlets, nozzle, etc)?

Thanks in anticipation

pritish