New Materials Remove Carbon Dioxide Directly From the Source

In recent years, concerns over global climate change caused by excess levels of carbon dioxide in the atmosphere has led to a number of technologies developed by experts to capture the CO2 produced by humans at the source. These have included the use of things such as edible sponges, molten salts and bacteria, to name just a few. Now, a group of scientists is claiming success with a process that has achieved "some of the highest carbon dioxide removal rates ever reported for humid air" ... and it uses a common and inexpensive polymer.

A commonly-available, inexpensive polymer has been shown to be very effective at capturing carbon dioxide from sources such as smokestacks. (Picture from: http://www.gizmag.com/)

According to Alain Goeppert, G. K. Surya Prakash, chemistry Nobel Laureate George A. Olah and their colleagues on the report  was recently published in the Journal of the American Chemical Society, explain that controlling emissions of carbon dioxide (CO2) is one of the biggest challenges facing humanity in the 21st century. They point out that existing methods for removing carbon dioxide from smokestacks and other sources, including the atmosphere, are energy intensive, don't work well and have other drawbacks. In an effort to overcome such obstacles, the group turned to solid materials based on polyethylenimine, a readily available and inexpensive polymeric material.

Process they created utilizes the filter containing the polymer polyethylenimine. Under conditions that reportedly thwarted other, related materials, it was able to effectively remove CO2 from sources such as smokestack effluent, tailpipe emissions, or even directly out of the open atmosphere.

The polyethylenimine easily released the trapped carbon dioxide on demand, so that it could be used in industry, or more permanently stored. Once it has released its CO2 load, the polymer can apparently be recycled and reused many times, without losing efficiency.

Besides its use in the reduction of greenhouse gases, the scientists suggest that it could also be used in air purification systems, such as those found on submarines. *** [EKA | GIZMAG | SCIENCEDAILY]

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