Improving Costs and Benefits of Carbon Capture and Storage by Reversible Hydration of Carbon Dioxide Catalyzed by Nickel Nanoparticles

摘要

Storing CO2 in geologic strata, over a long period of time, includes three mechanisms of capillaryrntrapping, dissolution trapping, and mineralization. Due to its low density and viscosity mobile CO2 willrnrise in the geological strata and also the current estimations suggest that it will take more than 1000 yearsrnfor CO2 to permanently trap in the formation as a result of solubilization or mineral trapping. It is a keyrnconcern for CO2 storage, since sequestered CO2 will potentially rise through the geologic strata and bernemitted back into the atmosphere.rnHere we propose a new strategy for carbon storage where CO2 is injected and bubbled through waterrnin an ongoing operating reaction vessel after emplacement of Nickel nanoparticles which converts gaseousrnCO2 into carbonates. What nickel nanoparticles do is accelerate the natural conversion of CO2 to carbonicrnacid.rnThe catalytic activity of the Nickel is pH independent and as they are water insoluble and magnetic sornthey can be magnetically separated for reuse. And the most important advantage of this technique is that,rnCO2 does not require to be monitored because it is present in the solid carbonate form whereas in thernconventional method the concentrated CO2 is compressed into liquid and piped underground which hasrnto be looked after for leakage. Turning CO2 gas into a solid that is stable over geological time will berneconomical. Buildings can be constructed using the carbonate, it can be dumped into the large holes,rnwhatever, but after that it can be ignored. The CO2 will not be able to escape and no one has to payrnattention to it.