Enhanced CO2 Capture Capacity of Nitrogen-Doped Biomass-Derived Porous Carbons

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• 作者：Jie Chen ; Jie Yang ; Gengshen Hu ; Xin Hu ; Zhiming Li ; Siwei Shen ; Maciej Radosz ; Maohong Fan
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：March 7, 2016
• 年：2016
• 卷：4
• 期：3
• 页码：1439-1445
• 全文大小：506K
• ISSN：2168-0485

文摘

Nitrogen-doped porous carbons obtained from coconut shell by urea modification and KOH activation are found to exhibit very high CO₂ uptake at 1 bar, almost 5 mmol g^–1 at 25 °C and over 7 mmol g^–1 at 0 °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/N₂ 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.