通过氢氧化钠处理获得的牛油果核衍生活性炭上一氧化碳吸附的研究。
Investigation of CO Adsorption on Avocado Stone-Derived Activated Carbon Obtained through NaOH Treatment.
作者信息
Siemak Joanna, Wróbel Rafał J, Pęksiński Jakub, Michalkiewicz Beata
机构信息
Department of Catalytic and Sorbent Materials Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Piastów Ave. 42, 71-065 Szczecin, Poland.
Faculty of Electrical Engineering, West Pomeranian University of Technology, 26 Kwietnia St. 10, 71-126 Szczecin, Poland.
出版信息
Materials (Basel). 2023 Jun 14;16(12):4390. doi: 10.3390/ma16124390.
Activated carbons were prepared from avocado stone through NaOH activation and subsequent carbonization. The following textural parameters were achieved: specific surface area: 817-1172 m/g, total pore volume: 0.538-0.691 cm/g, micropore volume 0.259-0.375 cm/g. The well-developed microporosity resulted in a good CO adsorption value of 5.9 mmol/g at a temperature of 0 °C and 1 bar and selectivity over nitrogen for flue gas simulation. The activated carbons were investigated using nitrogen sorption at -196 °C, CO sorption, X-ray diffraction, and SEM. It was found that the adsorption data were more in line with the Sips model. The isosteric heat of adsorption for the best sorbent was calculated. It was found that the isosteric heat of adsorption changed in the range of 25 to 40 kJ/mol depending on the surface coverage. The novelty of the work is the production of highly microporous activated carbons from avocado stones with high CO adsorption. Before now, the activation of avocado stones using NaOH had never been described.
通过氢氧化钠活化和随后的碳化，从鳄梨核制备了活性炭。获得了以下结构参数：比表面积：817 - 1172 m/g，总孔体积：0.538 - 0.691 cm/g，微孔体积0.259 - 0.375 cm/g。发达的微孔结构在0°C和1巴的温度下产生了5.9 mmol/g的良好CO吸附值，并在模拟烟道气中对氮气具有选择性。使用-196°C下的氮气吸附、CO吸附、X射线衍射和扫描电子显微镜对活性炭进行了研究。发现吸附数据更符合Sips模型。计算了最佳吸附剂的等量吸附热。发现等量吸附热根据表面覆盖率在25至40 kJ/mol的范围内变化。这项工作的新颖之处在于用鳄梨核生产具有高CO吸附性的高度微孔活性炭。在此之前，从未描述过使用氢氧化钠对鳄梨核进行活化。
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