Kiełbasa Karolina
Department of Catalytic and Sorbent Materials Engineering, Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology in Szczecin, Szczecin, Poland.
Front Chem. 2023 Jun 19;11:1184389. doi: 10.3389/fchem.2023.1184389. eCollection 2023.
An innovative and cost-effective method for enhancing CO capture by modifying the textural properties of derived activated biocarbons was explored. A molasses solution was prepared with a sucrose concentration of 1 mol/dm. A two-step synthesis process was involved, which includes the hydrothermal synthesis of spherical carbonaceous materials from molasses followed by chemical activation. The carbonaceous material to activation agent ratio was studied from 1 to 4. The CO adsorption of all activated biocarbons was tested at 0, 10, and 20°C and a pressure of up to 1 bar. The results showed a significant correlation between CO adsorption and the textural properties of the activated biocarbons. The activated biocarbon with the highest CO adsorption of 7.1 mmol/g at 1 bar and 0°C was successfully produced by modifying with KOH. The selectivity of CO over N calculated on the basis of the Ideal Adsorbed Solution Theory was excellent (16.5). The Sips model was found to be the most suitable, and the isosteric heats of adsorption were also specified.
探索了一种通过改变衍生活性生物炭的结构性质来提高二氧化碳捕获量的创新且经济高效的方法。制备了蔗糖浓度为1摩尔/立方分米的糖蜜溶液。该过程涉及两步合成，包括由糖蜜水热合成球形碳质材料，然后进行化学活化。研究了碳质材料与活化剂的比例为1至4。在0、10和20°C以及高达1巴的压力下测试了所有活性生物炭对二氧化碳的吸附。结果表明，二氧化碳吸附与活性生物炭的结构性质之间存在显著相关性。通过用氢氧化钾改性成功制备了在1巴和0°C下二氧化碳吸附量最高达7.1毫摩尔/克的活性生物炭。基于理想吸附溶液理论计算的二氧化碳对氮气的选择性极佳（16.5）。发现Sips模型最为合适，还确定了吸附等温热。
