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New Material for CO2 Absorption
6 July 2009
Researchers at Universidad Nacional Autónoma de México have found that the lithium aluminate Li5AlO4 absorbs CO2 over a wide temperature range, and may be an alternative to capturing agents based on heavier elements.
A paper on their work was published in the ACS Journal of Physical Chemistry A.
Li5AlO4 absorbed CO2 in a wide temperature range from 200 to 700 °C, but it sintered as a function of temperature. At low temperatures, the CO2 absorption decreased because of the sintering effect, which implies a reduction of the surface area. However at high temperatures, this phenomenon was not observed because lithium diffusion was activated.
Last but not least, it has to be mentioned that aluminum is a lighter element in comparison with the other elements used as structural ceramics for this application, for example silicates (Li4SiO4 and Li2SiO3), cuprates (Li2CuO2), zirconates (Li2ZrO3 and Li6Zr2O7), or titanates (Li4TiO4). Therefore, because Li5AlO4 has the best theoretical CO2 chemisorption capacity per gram of ceramic among the lithium ceramics and because of the results obtained, Li5AlO4 may become an important case of study as a CO2 captor.
—Ávalos-Rendón et al.
Resources
Tatiana Ávalos-Rendón, Julio Casa-Madrid and Heriberto Pfeiffer (2009) Thermochemical Capture of Carbon Dioxide on Lithium Aluminates (LiAlO2 and Li5AlO4): A New Option for the CO2 Absorption. J. Phys. Chem. A, 113 (25), pp 6919–6923 doi: 10.1021/jp902501v
July 6, 2009 in Brief | Permalink | Comments (6) | TrackBack (0)
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With Lithium already used in batteries, if it is now also used as a CO2 absorber, the global efforts to go green could stumble into a Lithium price problem...
Posted by: Simodul | July 06, 2009 at 05:24 AM
.
Trees, and plant life in general, work incredibly well. As CO2 increases plant life flourishes, increasing CO2 absorption. Oh yeah, I forgot... Plants don't require massive government funded "research" projects, big university salaries/pensions, and jetting around the world (HUGE CO2 emitter) to conferences where you can tell your friends how smart you are (even though your models NEVER come to fruition).
How about those RECORD cold temperatures that we've been having lately due to Global Warming!?!?
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Posted by: The Goracle | July 06, 2009 at 08:48 AM
There was an article on a CO2 absorption tower that collected and sequestered CO2 without expensive materials nor lots of energy. The best way is not to let the CO2 into the environment in the first place.
Posted by: SJC | July 06, 2009 at 09:29 AM
Maybe if they could make soda cans out of this ceramic material, we could cut down on the CO2 emissions from Coca Cola, Pepsi, Mountain Dew, beer and the billions of carbonated beverages consumed daily.
Or we could let plant life do it.
Posted by: Reel$$ | July 06, 2009 at 12:25 PM
Hey Goracle,
If plants are so good a sequestering CO2, why aren't they doing their job? CO2 is now at almost 390 ppmv and still rising. Those plants better hurry up!
Posted by: Anne | July 07, 2009 at 05:33 AM
@Anne:
Seriously. Have you ever tried to make a plant hurry up?
Posted by: sulleny | July 08, 2009 at 09:34 AM