Clean Technology 2011

Carbon Capture and Recycling by photocatalysts supported on Silica Nanosprings

T. Prakash, O.G. Marin-Flores, T. Cantrell, M. Grant Norton, D.N. McIlroy, G. Corti
GoNano Technologies, Inc., US

Keywords: nanosprings, CO2, recycling, photocatalyst


Greenhouse Gas mitigation is seen as a necessity by both the USA and the international community. GoNano Technologies Inc. is currently developing Carbon Capture and Recycling(CCR) technology as an alternative and/or a complement to the Carbon capture and sequestration technology. CCR involves the conversion of captured or emitted CO2 into useful products such as formic acid, formaldehyde or formic acid by anatase TiO2 nanoparticles immobilized on Silica NanospringsTM. The reduction is catalysed by the incident solar light or high energy efficiency UV LED lights that provide for lower energy penalties. The CCR system utilizes a solar panel like reactor that has the photocatalyst mat inside and a quartz window to allow for solar light and UV light irradiation. The assessment of the CO2 conversion is done by two types of reactions: A) CO2 conversion into methanol at 3-5% efficiencies from aqueous solutions of CO2 and B) CO2 reduction into formaldehyde and formic acid in the presence of 1% methanol at 12-15% efficiencies. These results indicate that the CCR technology is capable of selectively reducing CO2 into products. Enhancing the conversion efficiencies with interface engineering of the photocatalyst is now being pursued.

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