14 replies to this topic

[chemtan]

Hi All,

I have a study in hand to identify how can we utilize 50MMCFD of CO2 from a gas field instead of sending it into atmosphere?

Have you seen\designed or have info on any process where CO2 is being used?

FYI some methods of disposing CO2 from gas field are to inject it into dry well or deposit deep in ocean bed. I'm looking for a more practical solution where it can be utilized into something useful.

Anyone having seen utilization of CO2 is requested to please respond.

Edited by chemtan, 16 November 2009 - 12:28 AM.

[David Sugiman]

Hi All,

I have a study in hand to identify how can we utilize 50MMCFD of CO2 from a gas field instead of sending it into atmosphere?

Have you seen\designed or have info on any process where CO2 is being used?

FYI some methods of disposing CO2 from gas field are to inject it into dry well or deposit deep in ocean bed. I'm looking for a more practical solution where it can be utilized into something useful.

Anyone having seen utilization of CO2 is requested to please respond.

It is still in development stage, but recently, there are researches focusing on conversion of CO2 to methanol.
For example:
http://newenergyandf...o2-to-methanol/

[Zauberberg]

If there is a market for it - refrigerate and liquefy CO2, and sell it! That's very popular in many parts of the world.

[chemtan]

If there is a market for it - refrigerate and liquefy CO2, and sell it! That's very popular in many parts of the world.

Actually, we are aiming to obtain carbon credits as per Kyoto Protocol. Kyoto Protocol requires CO2 sequestering while refrigerating and selling -as I know- is considered as "displacing" CO2, not "Sequestering". That's where problem comes in marketing it.

We have to make sure that CO2 that we isolate from process do not end up in atmosphere.

[acjoven]

We have to make sure that CO2 that we isolate from process do not end up in atmosphere.

Some simple bioremediation process would easily convert CO₂ into larger compounds. An easy step would be feeding the CO₂ to algae beds, from which you could harvest H₂ gas or bio-oils (can be converted to biodiesel) for energy production.

[chemtan]

We have to make sure that CO2 that we isolate from process do not end up in atmosphere.

Some simple bioremediation process would easily convert CO₂ into larger compounds. An easy step would be feeding the CO₂ to algae beds, from which you could harvest H₂ gas or bio-oils (can be converted to biodiesel) for energy production.

Good idea, I went through some literature and it did mention this remedial process...I will work on it to see if 50MMCFD CO2 gas can be handled by this method or not, at the moment I think such a huge quantity of gas would be hard to handle (just my view, not supported by any calculation\basis).

Edited by chemtan, 16 November 2009 - 10:46 PM.

[chemtan]

[quote name='chemtan' date='16 November 2009 - 10:45 PM' timestamp='1258430140' post='34252']
[quote name='acjoven' date='16 November 2009 - 06:47 PM' timestamp='1258415854' post='34248']
[quote name='chemtan' date='16 November 2009 - 03:51 AM' timestamp='1258369279' post='34232']
We have to make sure that CO2 that we isolate from process do not end up in atmosphere.
[/quote]

Some simple bioremediation process would easily convert CO₂ into larger compounds. An easy step would be feeding the CO₂ to algae beds, from which you could harvest H₂ gas or bio-oils (can be converted to biodiesel) for energy production.
[/quote]

Just found that Algae reactors are used at pilot scale in research. The one that I found being used for research handles 0.2MMSCFD of flue gases. Assuming 100% CO2 means 0.2MMSCFD of CO2 while my system produces 50MMSCFD of CO2

[Satyajit]

Hi Chemtan,
I have few questions before I give some possible answers.
1. What is the purity of CO2?
2. Is it onshore?

I assume CO2 available is 100% pure when separated from other gases and it is onshore.
50 MMSCFD CO2 is equivalent to 115 MT/HR CO2 .
Today there is a huge demand for agricultural food in the world; almost billion people are without food.
The solution is to promote agriculture and you need Urea for that as fertilizer to increase agricultural output e.g food grains .
You can make 157 MT/Hr Urea from 115 MT/hr CO2 plus balance ammonia.
This is equivalent to 3768 MT/day Urea Production.

There is a proven market in asia, Europe and Africa,South America for Urea Fertlizer.
The market price for this Urea is about USD1,13 Million daily or 412 Million USD annually.
The investment cost for such a plant will be less than a Biliion USD.

There are many companies who will be interested for buyback of Urea if you sell at a reasonable cost and supply ammonia for this plant.

Hope you like this idea.
Kind regards,
Satyajit

[chemtan]

Dear Satyajit,

The stream is mainly CO2 from exhaust of onshore Gas sweetening plant, it also contains H2S though.

However, I think this could be one option worth exploring. I'm not sure if there is a fertilizer plant near the gas facility but this is worth exploring.


Tanveer

[chemtan]

After some exhaustive study, the options available at the moment are:

1. Use CO2 for Urea manufacturing.
2. Use CO2 to feed algae, which, in turn can be used to generate bio-diesel.

I thought to write these things here so anyone else doing such a work/study can have some thing to begin with.

Earnest Regards

[Technocrat]

Dear chemtan,

Generally ammonia and uera plants are in the same premises. Urea plant utilizes CO2 generated in the ammonia plant.

If we use CO2 recovered from other sources then the CO2 generated in ammonia plant has to be vented. No doubt we can use recovered CO2 in urea plants which are away from ammonia plant but the question of utilization of generated CO2 in ammonia plant remains unanswered.

But we can use recovered CO2 to make chemicals other than urea.

Regards.

[chemtan]

Dear Technocrat,

Can we produce less CO2 in furnaces of fertilizer production? Not sure because the reformers produce CO, CO2 and H2. Having less methane burned would mean less CO2 but also less H2 (H2 is required for haber-Bosch process of Ammonia conversion) - So not too sure how valid is this idea.

Overall, this would need to be looked into in detail... What I meant in my last post was a "starting point" for brain storming the 2 options.

Edited by chemtan, 11 December 2009 - 02:18 AM.

[djack77494]

CO2 injected at supercritical pressures (around 74 bar) is very effective in liberating "trapped" oil from within a formation. So it can be used in large quantities for enhanced oil recovery.

[chemtan]

CO2 injected at supercritical pressures (around 74 bar) is very effective in liberating "trapped" oil from within a formation. So it can be used in large quantities for enhanced oil recovery.

Use of CO2 for enhanced oil recovery and for enhanced coal bed methane recovery is already done - although only at few places. Reason for this is that the environmental consequences of such a usage of CO2 are unknown over period of long intervals of time (say, 100 years from now).

As the purpose of my study is to gain carbon credits as per Kyoto Protocol by disposing/utilizing CO2, I think this method of usage might not be applicable for carbon Credits (not sure as Kyoto Protocol does not exclude/specify any method).

BTW, mine case is of a gas reservoir where CO2 is already 69% by molar composition in raw gas.

[djack77494]

OK, the injection of CO2 would not work in your case. But I think it is accepted as an adequate disposal method. To view some interesting thoughts on "greenhouse warming" you might enjoy checking the Global Warming Forum.

Edited by djack77494, 18 December 2009 - 05:12 PM.