Thanks for responding. I really don't follow this. If I have a beaker of water fully equilibrated with air (CO2) and add your Ni particles, you are saying that more HCO3- and ultimately CO3s will spontaneously be produced. This won't happen unless thermodynamically favored, and if that water if fully equilibrated with air CO2 there is no thermodynamic condition that will force a change in the C chemistry. If your Ni particles are somehow consuming H+ or producing OH- then you've got a driving force, but you still need a source cations to make CaCO3s (am very interested to learn how you cheaply extract cations from silicates.) Otherwise, adding a catalyst to a system at thermodynamic equilibrium does nothing. On the other hand, adding something to seawater that overcomes the natural, chemical inhibition of abiotic CaCO3s precipitation could really cause some serious precipitation and CO2 injection into the atmosphere. No? -Greg
From: "lidijasil...@gmail.com<mailto:lidijasil...@gmail.com>" <lidijasil...@gmail.com<mailto:lidijasil...@gmail.com>> Reply-To: "lidijasil...@gmail.com<mailto:lidijasil...@gmail.com>" <lidijasil...@gmail.com<mailto:lidijasil...@gmail.com>> Date: Thursday, February 7, 2013 8:32 AM To: geoengineering <geoengineering@googlegroups.com<mailto:geoengineering@googlegroups.com>> Subject: [geo] Re: Nickel nanoparticles catalyse reversible hydration of carbon dioxide for mineralization carbon capture and storage - Catalysis Science & Technology (RSC Publishing) With presence of Ni we have increases at the same time trapping of CO2 and increased the rates of conversion to carbonic acid on room temperature and on the atmospheric pressure. We still working to find the best mineralisation pathway - we will use silicates (magnesium calcium silicates) as a source of Ca2+ or Mg2+. While nickel nanoparticles are toxic as already mentioned in the paper we do not propose to spread this around in the enviroment but to have local disposal next to power plant or industrial plant. We made brief cost - 8$ per ton of CO2 if we can recover Ni 99% yield based on current price of nickel. -- 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 geoengineering+unsubscr...@googlegroups.com<mailto:geoengineering+unsubscr...@googlegroups.com>. To post to this group, send email to geoengineering@googlegroups.com<mailto:geoengineering@googlegroups.com>. 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 geoengineering+unsubscr...@googlegroups.com. To post to this group, send email to geoengineering@googlegroups.com. Visit this group at http://groups.google.com/group/geoengineering?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
