Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities, especially generated from burning fossil fuel. CO2 capture and sequestration is a critical short term solution to mitigate climate change while longer term solutions involving nonrenewable and sustainable energy solutions are developed. Unlike some of the commercial CO2 absorption methods using solvents, such as monoethanolamine (MEA), polyethylenimine (PEI) coated nano-porous materials such as titanate are very promising for post-combustion CO2 capture. In our ongoing research, PEI polymers impregnated on protonated titanate nanotubes (PEI-PTNTs) are being investigated as a possible means of carbon capture from the flue gas after coal combustion.
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