The CO₂ adsorption and CO₂ adsorption kinetics were evaluated by thermogravimetry on two Prussian blue analogues, K_2x/3Cu^II [Fe^II_x Fe^III_1-x (CN)₆]_2/3, with nominally K-free x = 0.0 and K-rich x = 1.0. Differential isosteric heats of adsorption were determined from adsorption isotherms using the Clausius-Clapeyron equation and integral values by differential scanning calorimetry. The average differential heats of CO₂ adsorption are 28 kJ/mol for x = 0.0 and 33 kJ/mol for x = 1.0. Both compositions show small maxima in differential heat at ∼1 mmol/g. The integral adsorption heats were determined to be 26 kJ/mol for both x = 0.0 and x = 1.0. The kinetic CO₂ adsorption/desorption curves can be modeled by a double exponential function describing two parallel processes with different rate constants. The activation energies for CO₂ adsorption on x = 0.0 were 6 (1) kJ/mol for the faster component and 16 (1) kJ/mol for the slower one, while the corresponding values for x = 1.0 were 9 (1) kJ/mol and 7 (1) kJ/mol, respectively. The maximum CO₂ uptake for both compositions was found to be ∼4.5 mmol/g, 19.8 wt %, at 1 bar and 273 K. The materials exhibited fast adsorption kinetics and stable cyclic performance at room temperature. The kinetics were slower for the samples with x = 1.0 than for x = 0.0 which may be attributed to interactions between CO₂ molecules and K⁺ ions.

通过热重法在两种普鲁士蓝类似物K _{2 x / 3} Cu ^II [Fe ^II _x Fe ^III _{1- x}（CN）₆ ] _2/3上评估了CO ₂吸附和CO ₂吸附动力学_，名义上无K x  = 0.0，富K x  = 1.0。使用Clausius-Clapeyron方程从吸附等温线确定吸附的等温等差热，并通过差示扫描量热法确定积分值。x的平均CO ₂吸附热差为28 kJ / mol 当x  = 1.0时= 0.0和33 kJ / mol 。两种组合物在〜1 mmol / g的差热中均显示出较小的最大值。对于x  ＝ 0.0和x  ＝ 1.0 ，积分吸附热确定为26kJ / mol 。动力学CO ₂吸附/解吸曲线可以通过双指数函数建模，该函数描述了两个具有不同速率常数的并行过程。x  = 0.0时，CO ₂吸附的活化能对于较快的组分为6（1）kJ / mol，对于较慢的 组分为16（1）kJ / mol，而x = 1.0的相应值为9（1）kJ。 / mol和7（1）kJ / mol。最大CO ₂发现两种组合物在1bar和273K下的吸收为〜4.5mmol / g，19.8wt％。该材料在室温下显示出快速的吸附动力学和稳定的循环性能。对于x  = 1.0的样品，动力学要慢于x  = 0.0的样品，这可能归因于CO ₂分子与K ⁺离子之间的相互作用。