Where does the Ca2+ or Mg2+ (or other cations) come from that you would need to make the carbonate minerals.
The challenge is to find bases that can be extracted without causing substantial environmental damage. Usually things that sound too good to be true are too good to be true. Ken Caldeira [email protected] +1 650 704 7212 http://dge.stanford.edu/labs/caldeiralab Typed on an all-thumbs keyboard On Feb 7, 2013, at 8:17, David Lewis <[email protected]> wrote: > BBC News quotes co-author Lidija Siller: "You bubble CO2 through the water in > which you have nickel nanoparticles and you are trapping much more carbon > than you would normally - and then you can easily turn it into calcium > carbonate. It seems too good to be true, but it works," > > The Newcastle University press release quotes Siller "the result was the > complete removal of CO2". NU PR states the group has patented the process > and are looking for investors. PhD student lead author Gaurav Bhaduri is > quoted: "[the nickel catalyst] is very cheap, a thousand times cheaper than > carbon anhydrase" > > Chemistry World, i.e.: "Sea urchin inspires carbon capture catalyst" quotes > Siller: "'The current challenge that we are addressing is to quantify the > process. We would like to determine the reaction kinetics and exact yields. > Once we have this information we plan to do a small continuous process in a > lab-scale pilot plant". And they've dug up a skeptic: 'This work > represents an incremental addition to CO2 capture where the catalytic > dimension is relevant,' comments Mark Keane, who investigates catalysis > engineering at Heriot-Watt University in Edinburgh, UK. 'True innovation, > however, should harness catalytic action in the conversion of CO2 to high > value products, such as carbamates". > > > > On Tuesday, February 5, 2013 11:03:52 AM UTC-8, andrewjlockley wrote: >> >> http://pubs.rsc.org/en/content/articlelanding/2013/cy/c3cy20791a >> >> Nickel nanoparticles catalyse reversible hydration of carbon dioxide for >> mineralization carbon capture and storage >> >> Gaurav A. Bhaduri and Lidija ŠillerCatal. Sci. Technol., 2013, Advance >> Article DOI: 10.1039/C3CY20791A >> >> Abstract >> The separation and storage of CO2 in geological form as mineral carbonates >> has been seen as a viable method to reduce the concentration of CO2 from the >> atmosphere. Mineralization of CO2 to mineral salts like calcium carbonate >> provides a stable storage of CO2. Reversible hydration of CO2 to carbonic >> acid is the rate limiting step in the mineralization process. We report >> catalysis of the reversible hydration of CO2 using nickel nanoparticles >> (NiNPs) at room temperature and atmospheric pressure. The catalytic activity >> of the NiNPs is pH independent and as they are water insoluble and magnetic >> they can be magnetically separated for reuse. The reaction steps were >> characterized using X-ray photoemission spectroscopy and a possible reaction >> mechanism is described. >> > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/geoengineering?hl=en. > For more options, visit https://groups.google.com/groups/opt_out. > > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/geoengineering?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
