In this study, a hypercrosslinked polymer (HCP) adsorbent based on Friedel–Crafts reaction and carbazole as a monomer was synthesized and used for CO₂ capture. The HCP adsorbent is characterized by Fourier transform infrared spectroscopy, Brunauer, Emmett and Teller analysis, and energy dispersive spectroscopy. The effects of crosslinker to carbazole ratio, synthesis time and catalyst type, and their interactions were evaluated by response surface methodology using central composite design. The result showed that the optimum adsorption capacity (191.2 mg/g) was obtained at a crosslinker to carbazole ratio of 2.7, synthesis time of 11.2 h, and FeCl₃ as catalyst of the reaction. The experimental adsorption data fitted by adsorption isotherm and kinetic models in the optimized parameter values and correlation coefficient (R²) were considered to select the best model. The results showed that Hill isotherm and Elovich kinetic models have higher R² values than other models. Finally, the feasibility of the adsorption process was determined by thermodynamic modeling and enthalpy, entropy, and Gibbs free energy differences of adsorption at 298.15 K and 5 bar were calculated −15.035 kJ/mol, −0.025 kJ/mol.K and −7.822 kJ/mol, respectively.

中文翻译：

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基于咔唑的超交联聚合物吸附剂的表征以实现更高的 CO2 捕获

在本研究中，合成了一种基于 Friedel-Crafts 反应和咔唑作为单体的超交联聚合物 (HCP) 吸附剂，并将其用于 CO ₂捕获。HCP 吸附剂的特征在于傅里叶变换红外光谱、Brunauer、Emmett 和 Teller 分析以及能量色散光谱。交联剂与咔唑的比例、合成时间和催化剂类型的影响以及它们的相互作用通过使用中心复合设计的响应面方法进行评估。结果表明，在交联剂与咔唑的比例为2.7、合成时间为11.2 h、FeCl _{3 的条件}下获得最佳吸附容量（191.2 mg/g）。作为反应的催化剂。考虑优化参数值和相关系数( R ² )中的吸附等温线和动力学模型拟合的实验吸附数据来选择最佳模型。结果表明，Hill 等温线和Elovich 动力学模型比其他模型具有更高的R ²值。最后，通过热力学模型确定吸附过程的可行性，并计算出在 298.15 K 和 5 bar 下吸附的焓、熵和吉布斯自由能差 -15.035 kJ/mol、-0.025 kJ/mol.K 和 -7.822 kJ /mol，分别。