The gas-phase mass transfer coefficient is one of the significant parameter for the determination of mass transfer in absorption columns. A novel correlation was obtained for the calculation of the gas phase mass transfer coefficient in the current research study based on the theoretical investigation and experimental data. Buckingham pi-theorem was utilized to develop an overall dimensionless correlation. The correlation was derived based on the experimental data conducted at the operating conditions’ range of temperature 40–100 °C, CO₂ partial pressure of 18-66 kPa, and piperazine (PZ) concentration of 2-8 M. The correlation was validated using the experimental data with an acceptable error of 7.47%. The results showed that the gas-phase mass transfer coefficient was increased by enhancing the amount of holdup and Schmidt number (Sc) at different temperatures and PZ concentrations. Furthermore, by comparing the Sc number with holdup, it was observed that a higher temperature resulted in a higher hold-up amount in the gas-phase of the absorption column.

气相传质系数是确定吸收塔传质的重要参数之一。在理论研究和实验数据的基础上，本研究获得了一种新型的气相传质系数计算公式。利用白金汉π定理建立了一个整体的无量纲相关性。相关性是根据在40–100°C的温度，CO ₂的工作条件范围内进行的实验数据得出的分压为18-66 kPa，哌嗪（PZ）浓度为2-8M。使用实验数据验证了相关性，可接受的误差为7.47％。结果表明，在不同的温度和PZ浓度下，通过提高持留量和Schmidt数（Sc），可以提高气相传质系数。此外，通过将Sc数与滞留量进行比较，观察到较高的温度导致吸收塔的气相中的滞留量较高。