8 replies to this topic

[alokjaiswal]

Has any process engineer implemented the idea of recovering CO2 from the flue gas of any furnace, the flue gas being operated at 170 deg C?

[ankur2061]

Alok,

Please find attached an article on CO₂ recovery. Section 5.2 of the attached article gives details about CO₂ recovery from flue gases.

Regards,
Ankur.

[alokjaiswal]

Dear Ankur,

I dint find any article attached by you. if you have any, then you can mail me also.

[ankur2061]

Alok,

I have tried to attach it but the upload is failing repeatedly. I have informed the administrator.

Regards,
Ankur.

[Zauberberg]

Is there any particular reason why do you want to employ membranes, or it is just a screening study? There is one interesting paper attached below.

Also, if you look at previous threads on the same topic, I believe there are two or three very interesting discussions about the use of membranes for acid gas removal.

If you are interested in other flue gas treatment technologies, browse for the "CanSolv" process.

Attached Files

•  Membranes for CO2 Removal.pdf   1.1MB   54 downloads

[ankur2061]

Alok,

I am uploading another article on CO2 capture. Let us hope this upload works.

Regards,
Ankur.

Attached Files

•  co2_capture_strawman_feb2004.pdf   1.17MB   48 downloads

[alokjaiswal]

Basically, I am looking for feasibility of membrane wrt cost and space availability. Suppose, if there is 200 KNM3/hr flue gas flow at 170 deg C, then what will be the cost of membrane tech as compared to solvent tech.

[Zauberberg]

For detailed evaluation, you will need to obtain basic design information and preliminary estimate from the membrane vendor(s). One thing which doesn't support using membrane systems in CO2 removal applications, is their low selectivity. As described in the article, you might be forced to use a recycle Permeate compressor in order to make the process more efficient. Increasing the feed gas pressure has the same effect.

Make sure to compare both processes on the same basis, i.e. for the same inlet conditions and the same product (outlet streams) specifications.

[riven]

Basically, I am looking for feasibility of membrane wrt cost and space availability. Suppose, if there is 200 KNM3/hr flue gas flow at 170 deg C, then what will be the cost of membrane tech as compared to solvent tech.

There are a number of issues. first I would ask what is the volume or mass concentration of C)2 in the flue gas?

The main issue for he information you have provided the 170C; many membrane operations will not tolerate such temperatures. Membrane solutions for this application are typically in the research phase; try science direct.com for more references.

The reason why membrane are being considered is the alternatives are not easily viable or cheap especially as CO2 concentrations get high. For CCS this is the trend.