Abstract A novel and inexpensive method of modification of textural properties of commercial activated carbons for enhancement of CO2 capture was investigated. The commercial activated carbons FPV, WG-12 and CWZ-22 were applied as a starting material, and KOH and K2CO3 were used as modification agents. The modification temperature was varied over the range of 600 °C to 850 °C, and the ratio of modification agent to carbon from 1 to 4 was studied. The adsorption of CO2 was examined on all the activated carbons at temperature 25 °C up to pressure of 1 bar. A close correlation between the CO2 adsorption and the pore size of activated carbons was revealed. The activated carbon exhibiting the CO2 adsorption of 5.8 mmol/g under pressure of 1 bar and temperature of 0 °C was successfully obtained as a result of modification by KOH. After selecting of the best sorbents, the adsorption of CO2 was performed in the temperature range from 25 °C to 160 °C and under pressure up to 35 bar. The measured adsorption isotherm of CO2 was fitted to the numerous adsorption equations. The Sips model was found to be the best. The isosteric heats of adsorption were also calculated.

中文翻译：

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改进商业活性炭以增强 CO2 捕获的进展

摘要 研究了一种改进商业活性炭结构特性以增强 CO2 捕获的新颖且廉价的方法。以商用活性炭 FPV、WG-12 和 CWZ-22 为起始原料，以 KOH 和 K2CO3 为改性剂。改性温度在 600°C 至 850°C 的范围内变化，研究了改性剂与碳的比例为 1 至 4。在 25 °C 至 1 bar 的压力下检查了所有活性炭上的 CO2 吸附。揭示了 CO2 吸附与活性炭孔径之间的密切相关性。作为 KOH 改性的结果，成功获得了在 1 bar 压力和 0 °C 温度下表现出 5.8 mmol/g CO2 吸附的活性炭。选择最佳吸附剂后，在 25 °C 至 160 °C 的温度范围内和高达 35 bar 的压力下进行 CO2 的吸附。测得的 CO2 吸附等温线适合于众多吸附方程。发现 Sips 模型是最好的。还计算了等量吸附热。