The absorption reaction between aqueous NH₃ and CO₂ was studied using the Wetted Wall Column. A total of 27 different cases are investigated in the region defined by temperatures from 15 °C to 35 °C, NH₃ concentrations from 5% to 15%, which are the typical solvent conditions in absorption columns, and lastly CO₂ loadings from 0.2 to 0.6. The resulting overall mass transfer coefficient of absorption measured follows the trends described by the modelling of the reactor and the equations used to describe the rate of the absorption reactions. Moreover, the overall mass transfer coefficient of absorption is in agreement with data available in the literature, valid in smaller portions of the investigated region. From the data analysis, the kinetics of the absorption reactions in the liquid phase is characterized. The equation proposed to fit the data is a power law equation which reproduces the experimental results measured at different CO₂ loadings. This represents a novelty because in literature the kinetic model of the reaction is usually fitted only to data for unloaded solutions (CO₂ loading equal to zero). Hence, in this case there is an experimental evidence that the kinetic model holds true in every loading conditions. The kinetic model intercept the values found in literature in every range of concentration. Consequently, the model is valid in every conditions and the rate of the reaction between NH₃ and CO₂ in liquid phase is described with an Arrhenius constant with a pre-exponential factor of 1.41·10⁸ [mol/(m³s)] and an activation energy of 60,680 [J/mol], a linear dependence on the CO₂ concentration and a dependence on the NH₃ with an exponent γ = 1.89. The proposed equation is found to be appropriate for implementation into process simulation software.

使用湿壁塔研究了NH ₃和CO ₂水溶液之间的吸收反应。在温度从15°C到35°C，NH ₃浓度从5％到15％（这是吸收塔中的典型溶剂条件）和最后是CO ₂定义的区域中，总共研究了27种不同的情况负载从0.2到0.6。测得的吸收的总传质系数遵循反应器建模和用于描述吸收反应速率的方程式所描述的趋势。而且，吸收的总传质系数与文献中可用的数据一致，在研究区域的较小部分有效。通过数据分析，表征了液相中吸收反应的动力学。提出的适合数据的方程是幂定律方程，该方程重现了在不同CO ₂负载下测得的实验结果。这代表了一种新颖性，因为在文献中，反应的动力学模型通常仅适用于空载溶液的数据（CO ₂加载等于零）。因此，在这种情况下，有实验证据表明动力学模型在每种载荷条件下均成立。动力学模型截取了文献中每个浓度范围内的值。因此，该模型在所有条件下均有效，并且以Arrhenius常数和1.41·10 ⁸ [mol /（m ³ s）]的指数前期常数描述了液相中NH ₃与CO ₂之间的反应速率。活化能为60,680 [J / mol]，对CO ₂浓度呈线性依赖性，对NH ₃呈指数γ依赖性 = 1.89。发现所提出的方程式适合于在过程仿真软件中实施。