Sustainable and hierarchical porous Enteromorpha prolifera based carbon for CO2 capture.
Sustainable and hierarchical porous Enteromorpha prolifera based carbon for CO2 capture.
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DOI：
10.1016/j.jhazmat.2012.05.094
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发表时间：
2012-08
影响因子：
13.6
通讯作者：
Zhanquan Zhang;Ke Wang;J. Atkinson;Xinlong Yan;X. Li;M. Rood;Zifeng Yan
中科院分区：
文献类型：
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作者：
Zhanquan Zhang;Ke Wang;J. Atkinson;Xinlong Yan;X. Li;M. Rood;Zifeng Yan
以海洋污染物浒苔（Enteromorphaprolifera）为原料，采用水热碳化法和氢氧化钾活化法制备了含氮多孔炭。碳在其制备状态下含有多达2.6%的氮。采用XRD、N2吸附、FTIR、SEM、TEM和元素分析等手段对复合材料的理化性能进行了表征。炭具有微孔、中孔和大孔相互连接的分级结构。碳基质中的无机矿物有助于中孔和大孔的发展，起到原位硬模板的作用。该活性炭具有较高的CO2容量，且在室温下易于再生。在0-75°C范围内考察了CO2的吸附性能。在25°C和0°C下，使用15%CO2（v/v）的N2，CO2的动态吸收分别为61.4mg/g和105 mg/g。同时，在Ar下在25°C下再生在八个循环之后恢复了89%的碳的初始吸收。采用分段模型分析CO2吸附动力学; Avrami模型拟合良好，在0°C和25°C下的相关系数（R2）分别为0.98和0.99。
Nitrogen-containing porous carbon was synthesized from an ocean pollutant, Enteromorpha prolifera, via hydrothermal carbonization and potassium hydroxide activation. Carbons contained as much as 2.6% nitrogen in their as-prepared state. Physical and chemical properties were characterized by XRD, N2sorption, FTIR, SEM, TEM, and elemental analysis. The carbon exhibited a hierarchical structure with interconnected microporosity, mesoporosity and macroporosity. Inorganic minerals in the carbon matrix contributed to the development of mesoporosity and macroporosity, functioning as an in situ hard template. The carbon manifested high CO2capacity and facile regeneration at room temperature. The CO2sorption performance was investigated in the range of 0–75°C. The dynamic uptake of CO2is 61.4mg/g and 105mg/g at 25°C and 0°C, respectively, using 15% CO2(v/v) in N2. Meanwhile, regeneration under Ar at 25°C recovered 89% of the carbon's initial uptake after eight cycles. A piecewise model was employed to analyze the CO2adsorption kinetics; the Avrami model fit well with a correlation coefficient (R2) of 0.98 and 0.99 at 0°C and 25°C, respectively.