Abstract

Zeolite 13X was modified using a piperazine solution for CO₂ adsorption purposes. The operating parameters including temperature, pressure, piperazine concentration, adsorbent amount, and particle size are investigated experimentally to examine adsorption capacity. The maximum adsorption capacity was obtained at temperature of 25°C, pressure of 8 bar, piperazine concentration 2 wt.%, adsorbent amount of 1 g, and particle size of 200 µm. The adsorption capacity for Zeolite 13X is increased from 193.844 to 242.084 mg g⁻¹ after modification. The empirical isotherm data are more consistent with Freundlich model. The best adsorption kinetic model was Elovich model. The thermodynamic parameters represent the spontaneous and exothermic of the process.

摘要

使用哌嗪溶液对沸石 13X 进行改性以用于 CO ₂吸附目的。实验研究了操作参数，包括温度、压力、哌嗪浓度、吸附剂量和粒径，以检查吸附能力。在温度为 25°C、压力为 8 bar、哌嗪浓度为 2 wt.%、吸附剂量为 1 g 和粒径为 200 µm 时获得最大吸附容量。改性后沸石 13X 的吸附容量从 193.844 增加到 242.084 mg g ^-1。经验等温线数据更符合 Freundlich 模型。最好的吸附动力学模型是 Elovich 模型。热力学参数代表过程的自发和放热。