Department of Chemical Engineering, Widener University, One University Place, Chester, PA 19013, USA.
Department of Chemical Engineering, Widener University, One University Place, Chester, PA 19013, USA.
Bioresour Technol. 2018 May;256:232-240. doi: 10.1016/j.biortech.2018.02.026. Epub 2018 Feb 6.
Highly microporous carbons have been synthesized from four types of agro-wastes of lignin, walnut shells, orange peels and apricot seeds by one-step carbonization/activation with potassium hydroxide (KOH) in varying ratios. The resultant carbons demonstrated BET specific surface areas of 727-2254 m/g, and total pore volumes 0.34-1.14 cm/g. These are higher than the majority of agro-waste derived carbons reported in the literature. For all the carbons, CO adsorption at 298 K was higher than SF followed by N suggesting a possible separation of CO and SF from N. The adsorbed amounts of CO at 298 K and 273 K and at pressures up to 760 Torr were 7.24 and 9.4 mmol/g, respectively which, to the best of our knowledge, are the highest CO uptakes in these temperatures by any carbon material reported so far. For all the gases, selectivity, mixed adsorption isotherms and adsorption breakthrough have been simulated from experimental data.
已通过在不同比例下使用氢氧化钾 (KOH) 一步碳化/活化，由四种农林废弃物（木质素、核桃壳、橙皮和杏仁）合成了高微孔碳。所得碳的 BET 比表面积为 727-2254 m/g，总孔体积为 0.34-1.14 cm/g。这些都高于文献中报道的大多数农林废弃物衍生碳。对于所有碳，在 298 K 时 CO 的吸附量高于 SF，其次是 N，表明 CO 和 SF 可能从 N 中分离出来。在 298 K 和 273 K 下，在高达 760 Torr 的压力下，CO 的吸附量分别为 7.24 和 9.4 mmol/g，据我们所知，这是迄今为止在这些温度下任何碳材料报告的最高 CO 吸附量。对于所有气体，已根据实验数据模拟了选择性、混合吸附等温线和吸附突破。
