[Terrapreta] BASF's CO2 Scrubbing ZIF

[Sean K. Barry]

Hi Mark,

I saw this story on ZIF compounds in SCIENCE sometime these past fews months.  How much is it to make ZIF per lb vs how many lbs of CO2 stored, I wondered?  Did your reference answer this?  I was wondering this to try and put a price on other carbon (CO2) sequestration?  If ZIF can be made cheap, then CO2 producers will buy it or make it and raise the price of petroleum and coal to pay for the ZIF.

There is tons of photosynthetic "CO2 fixing" growing around the world that we don't take advantage of and it is cheap.  I think ZIF pound for pound might not compete for cost of CO2 sequestration with Terra Preta style charcoal-in-soil (or urine and nightsoil-in-charcoal ... in fired pottery chamber pots, broken in gardens ... as some might have it).

Nonetheless, zeolite-like compounds are interesting stuff.

The story I heard or read on CO2 at the bottom of the oceans (not sure where) is that the liquid CO2 still dissolves into the surrounding water.  If there were large enough reservoirs of liquid CO2 in the bottoms of the ocean, then the dissolution of the CO2 into the water could eventually a decrease in pH of the ocean water (carbonated oceans have higher acidity?).  This is a problem for most living systems in the oceans, I think.

Then, recharging CO2 filled ZIF by purging tons of CO2 into deep ocean reservoirs for long term storage seemed kind of labored, too.  Why not just stored CO2 straight from the source into ocean bottom reservoirs?  Why even use the ZIF?  The liquid CO2 at the bottom of the ocean is denser storage anyway.  Ah, ... if you are not near an ocean, store it in a ZIF?

What if NET CO2 producers had to buy and maintain large enough plantations of high Carbon ha-1 biomass crops and they had to pyrolyze it to make enough "fixed Carbon" in charcoal to offset the amount of carbon they released in their CO2 emissions per year?  They could do that cheaper than by enough rechargeable ZIF.

Regards,

SKB



Regards,

SKB
  ----- Original Message ----- 
  From: Mark Ludlow<mailto:mark at ludlow.com> 
  To: Shengar at aol.com<mailto:Shengar at aol.com> ; terrapreta at bioenergylists.org<mailto:terrapreta at bioenergylists.org> 
  Sent: Wednesday, April 02, 2008 9:23 PM
  Subject: Re: [Terrapreta] BASF's CO2 Scrubbing ZIF


  Hi Erich,

   

  This is an interesting development. Unfortunately, it depends on zeolite-like structures to "trap" CO2 in a lattice "cage".

   

  This is only one part of the sequestration issue. Next is: "What do you do with it?" If you don't regenerate the zeolite there's little practical utility; Given the 1:8 volumetric absorption ratio claimed,  this seems only useful for specialized applications. In reasonable quantities, ordinary zeolites useful for  capturing H2O (or NH3) are $2/kg. This would make the cost of this method-if used for sequestration-prohibitively costly.

   

  Perhaps if the trapped CO2 could be released at the bottom of the ocean or something. There's not much that reacts with CO2, without catalytic intervention. Photosynthesis is looking better all the time!

   

  Best regards,

  Mark

   

   

  From: terrapreta-bounces at bioenergylists.org [mailto:terrapreta-bounces at bioenergylists.org] On Behalf Of Shengar at aol.com
  Sent: Wednesday, April 02, 2008 6:24 PM
  To: terrapreta at bioenergylists.org
  Subject: [Terrapreta] BASF's CO2 Scrubbing ZIF

   

  BASF's CO2 Scrubbing ZIF........also can be modified for other gases. This may facilitate Biofuel gas separation, I haven't seen any cost estimates yet.

   

   Selectively removing carbon dioxide from waste streams

  A breakthrough by a team of scientists in the US has overcome the challenge of selectively removing carbon dioxide from waste gases. It all relies on a new class of porous materials called ZIFs

  http://www.engineerlive.com/features/20086/selectively-removing-carbon-dioxide-from-waste-streams.thtml<http://www.engineerlive.com/features/20086/selectively-removing-carbon-dioxide-from-waste-streams.thtml>

   

   

  Cheers,

  Erich






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