This paper presents adsorption isotherm data of CO₂ on four different metal oxides. Absolute adsorption isotherms of CO₂ at 313 K on WO₃ and at T = 313 K, 333 K, 353 K on CeO₂, TiO₂ and Al₂O₃ and pressures up to p = 25 MPa were determined from CO₂ excess adsorption isotherms. It was found at 313 K a maximum absolute loading of 0.3 mmol g⁻¹ for WO₃, of 1.7 mmol g⁻¹ for CeO₂, of 3.1 mmol g⁻¹ for TiO₂ and of 6.3 mmol g⁻¹ for Al₂O₃. All adsorption isotherms were fitted to the Freundlich, Langmuir, Padè, Sips and Toth models and the Padè model present a better fitting than the other models. Based on these data, the Padè and the Langmuir model were used to determine the isosteric enthalpy of adsorption which was found to be dependent on the loading and the used model.

本文介绍了 CO ₂在四种不同金属氧化物上的吸附等温线数据。由CO ₂过量吸附测定CO ₂在313 K 对WO ₃和在T = 313 K、333 K、353 K 在CeO ₂、TiO ₂和Al ₂ O ₃和压力高达p = 25 MPa 的绝对吸附等温线等温线。将其在313ķ0.3毫摩尔g的最大绝对装载发现^-1为WO ₃，1.7毫摩尔克^-1为的CeO ₂，3.1毫摩尔克^-1为二氧化钛₂和6.3毫摩尔克^-1表示 Al ₂ O ₃。所有吸附等温线均适用于 Freundlich、Langmuir、Padè、Sips 和 Toth 模型，并且 Padè 模型比其他模型具有更好的拟合效果。基于这些数据，使用 Padè 和 Langmuir 模型来确定等量吸附焓，发现这取决于负载和使用的模型。