8 research outputs found
Swellable, water- and acid-tolerant polymer sponges for chemoselective carbon dioxide capture
To impact carbon emissions, new materials for carbon capture must be inexpensive, robust, and able to adsorb CO2 specifically from a mixture of other gases. In particular, materials must be tolerant to the water vapor and to the acidic impurities that are present in gas streams produced by using fossil fuels to generate electricity. We show that a porous organic polymer has excellent CO2 capacity and high CO2 selectivity under conditions relevant to precombustion CO2 capture. Unlike polar adsorbents, such as zeolite 13x and the metalâorganic framework, HKUST-1, the CO2 adsorption capacity for the hydrophobic polymer is hardly affected by the adsorption of water vapor. The polymer is even stable to boiling in concentrated acid for extended periods, a property that is matched by few microporous adsorbents. The polymer adsorbs CO2 in a different way from rigid materials by physical swelling, much as a sponge adsorbs water. This gives rise to a higher CO2 capacities and much better CO2 selectivity than for other water-tolerant, nonswellable frameworks, such as activated carbon and ZIF-8. The polymer has superior function as a selective gas adsorbent, even though its constituent monomers are very simple organic feedstocks, as would be required for materials preparation on the large industrial scales required for carbon capture
Porous Organic Frameworks-derived Porous Carbons with Outstanding Gas Adsorption Performance
Swellable, Water- and Acid-Tolerant Polymer Sponges for Chemoselective Carbon Dioxide Capture
To
impact carbon emissions, new materials for carbon capture must
be inexpensive, robust, and able to adsorb CO<sub>2</sub> specifically
from a mixture of other gases. In particular, materials must be tolerant
to the water vapor and to the acidic impurities that are present in
gas streams produced by using fossil fuels to generate electricity.
We show that a porous organic polymer has excellent CO<sub>2</sub> capacity and high CO<sub>2</sub> selectivity under conditions relevant
to precombustion CO<sub>2</sub> capture. Unlike polar adsorbents,
such as zeolite 13x and the metalâorganic framework, HKUST-1,
the CO<sub>2</sub> adsorption capacity for the hydrophobic polymer
is hardly affected by the adsorption of water vapor. The polymer is
even stable to boiling in concentrated acid for extended periods,
a property that is matched by few microporous adsorbents. The polymer
adsorbs CO<sub>2</sub> in a different way from rigid materials by
physical swelling, much as a sponge adsorbs water. This gives rise
to a higher CO<sub>2</sub> capacities and much better CO<sub>2</sub> selectivity than for other water-tolerant, nonswellable frameworks,
such as activated carbon and ZIF-8. The polymer has superior function
as a selective gas adsorbent, even though its constituent monomers
are very simple organic feedstocks, as would be required for materials
preparation on the large industrial scales required for carbon capture