Carbon dioxide (CO2) emissions from fossil fuel consumption are believed to contribute to the global climate change. Capture and storage (CCS) technology is an effective way to curb CO2 emissions but it is energy intensive and thus costly. CO2 conversion and utilization (CCU) is more a more attractive route as it not only reduce CO2 emissions but also produce value-added products. Photocataltyic reduction of CO2 to fuels is one of the promising routes in CCU but the low conversion efficiency is a great obstacle. In this work, we have developed a novel concept to integrate CO2 capture and photocatalytic conversion (CCPC) by using a hybrid multifunctional material, with CO2 adsorption, desorption and conversion temperatures operated near power plant flue gas conditions (1 atm. and 100–200 oC). Little extra energy is demanded other than waste heat from flue gas plus solar radiation to power the CCPC process. Experiments show greater than 90% sorbent regeneration capacity and greater than 10% photocatalytic CO2 conversion to carbon monoxide (CO) during three adsorption/conversion/regeneration cycles. This novel CCPC process using the developed advanced hybrid materials, may provide a promising alternative to the power plant carbon emissions control.

Designing a hybrid multifunctional material for CO2 capture and photocatalytic conversion

249th National Meeting (2015)

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