Electromagnetic Flow Metering of CO2 1

[OpticControl]

Hello,

Currently working on the selection of a flow meter to measure a flow mix of water+amine+CO2.

I am currently considering Coriolis as the first option yet I have some lines larger than 16" and it's not economically attractive to use Coriolis for this applications.
I have done some research on using Ultrasonic but CO2 is challenging since it absorbs the ultrasonic wave and induces errors in the measurement.

This leads me to electromagnetic flow metering. The stream is a liquid, of course, yet I have not seen much lessons learned on the usage of electromagnetic flow meters for CO2.

Any thoughts?

Regards.

 

[danw2]

Electromagnetic flow metering is for conductive liquids only. CO2 gas does not qualify.

Thermal dispersion is the ideal inferred mass flow sensor for clean, dry gases. Thermal dispersion does not work well with wet gases. Thermal dispersion has a low pressure drop. It excels at lower velocity, lower flow rate measurements; in fact the real challenge is high flow rates that can exceed the ability of the instrument to source sufficient heat. For large diameter pipes there's an insertion style to keep the cost down, rather than a spool piece.

Look at vendors like Sierra Instruments, FCI (Flow Control Intl), Kurz, Magnetrol or Thermal Instrument.

 

[danw2]

My mistake, somehow I read the original post as flow measurement of CO2 gas flow, not a biphase mix of liquid water and non-soluble amine with some CO2. I don't know how I missed the real statement, but I did.

Whether the CO2 gas is dissolved in water or suspended as bubbles the challenge is the bi-phase flow measurement.

Thermal dispersion is not likely a solution unless the water/amine thermal conductivity can be determined, but it won't be on the normal tables.

Maybe a major player like MicroMotion can advise on the suitability of coriolis for bi-phase flow measurement.