High Purity CO2 Gas

[mggkg]

Flow Rate : 500~ 1000kg/hr (total Gas Flow)

Composition
CO2 :99.993 vol.%
O2 : 25ppm
N2 : 35ppm
H2O : 1.5ppm
others : 8.5ppm (as unknown)

Question:
We will intend to increase CO2 Contents up to 99.999%

First We want to remove N2 and O2 from CO2 Gas

comment Device or method ? please

 

[georgeverghese]

At this purity level, and given that CO2 is polar while O2/N2 are non polar, would suggest mole sieves - talk to UOP or Rhone Poulenc or Linde. They will also want to know pressures and temps for feed and exit streams.

 

[mggkg]

thank you georgeverghese for your reply.

I discussed this with UOP. But they answered Mole sieves is not the solution.

I am thinking How about Membrane...anyway thank you again..

 

[georgeverghese]

What were the reasons UOP said this isnt possible? Also talk to either one of the other vendors and see if they can give you a second opinion. Also chat with the people at BASF.

Membranes cannot help at these purity levels - they work okay for coarser separations.

Low temp extractive distillation (say with chilled propane or chilled butane) may be possible, but operating expenses will go through the roof.