Abstract The goal of the study is to assess the use of MDEA + PZ in place of MEA solvent in industrial conditions. In the first part of the paper, a concise package of the models and the correlations in the Rate-based model is introduced to simulate the capture processes. For this purpose, Onda, Bravo-Fair, and, Billet-Schultes mass transfer correlations are evaluated to determine the one with a precise prediction of CO2 absorption. The results show that Bravo-Fair mass transfer correlation has a lower average error, 10.24 %, compared to Onda, 16.41 %, and Billet-Schultes, 27.02 %. In the second part of this paper, different operational and process sensitivity analyses have been performed to investigate the capabilities of the MDEA + PZ in place of the prevalent solvents such as MEA in the industrial environment with the use of the data obtained from Kermanshah petrochemical’s Carbon Dioxide Recovery plant (CDR). According to the sensitivity analysis, which determines the influence of design parameters and operational conditions on CO2 absorption percentage, rich solvent temperature, liquid temperature profile, and CO2 mole fraction profile in the gas phase inside the CO2 absorption tower, the total solvent concentration is the most influential one in CO2 absorption (%) and rich solvent temperature (°C). Hence, in optimal conditions, the absorption percentage can be raised from the base case 64.62 % to 87.44 % for MDEA + PZ compared to 82.86 of MEA. In addition, the rich solvent temperature can be lifted to 53.61 °C in comparison with 47.24 °C for MEA.

中文翻译：

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工业 CO2 吸收到甲基二乙醇胺/哌嗪中代替吸收柱中的单乙醇胺

摘要 本研究的目的是评估在工业条件下使用 MDEA + PZ 代替 MEA 溶剂的情况。在论文的第一部分，介绍了模型的简洁包和基于速率的模型中的相关性来模拟捕获过程。为此，对 Onda、Bravo-Fair 和 Billet-Schultes 传质相关性进行了评估，以确定对 CO2 吸收进行精确预测的相关性。结果表明，与 Onda 的 16.41 % 和 Billet-Schultes 的 27.02 % 相比，Bravo-Fair 传质相关性的平均误差较低，为 10.24 %。在本文的第二部分，使用从 Kermanshah 石化的二氧化碳回收厂 (CDR) 获得的数据，已执行不同的操作和过程敏感性分析，以研究 MDEA + PZ 代替工业环境中常见溶剂（如 MEA）的能力。根据敏感性分析，确定设计参数和操作条件对 CO2 吸收塔内气相中 CO2 吸收百分比、富溶剂温度、液体温度分布和 CO2 摩尔分数分布的影响，总溶剂浓度为对 CO2 吸收 (%) 和富溶剂温度 (°C) 影响最大的一项。因此，在最佳条件下，与 MEA 的 82.86 相比，MDEA + PZ 的吸收百分比可以从基本情况的 64.62 % 提高到 87.44 %。