Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 4, Issue 3, Pages 1439-1445Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.5b01425
Keywords
CO2 adsorption; Nitrogen-doped porous carbons; Urea modification; KOH activation; Renewable biomass resource
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Funding
- Zhejiang Provincial Natural Science Foundation [LY15B060004]
- NSF of China [21106136]
- National Undergraduate Training Program for Innovation and Entrepreneurship of China [201510345015]
- University of Wyoming
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Nitrogen-doped porous carbons obtained from coconut shell by urea modification and KOH activation are found to exhibit very high CO, uptake at 1 bar, almost 5 mmol g(-1) at 25 degrees C and over 7 mmol g(-1) at 0 degrees C, respectively. The high CO2 uptake of the sorbent can be ascribed to its high microporosity and nitrogen content. In addition, these sorbents possess high CO2/N-2 selectivity, stable cyclic ability, high initial heat of CO2 adsorption, fast adsorption kinetics, and high dynamic CO2 capture capacity under simulated flue gas conditions. When combined with the low cost of the coconut-shell precursor, these properties make them exceptionally attractive sorbent candidates for CO2 capture.
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