Abstract The modeling procedure of an absorption-based carbon capture process using a blended amine solvent is presented. Semi-empirical correlation equations were developed for modeling the CO2 vapor-liquid equilibrium (VLE) and absorption rate in the ternary aqueous amine solvent used in this study. To reflect the non-ideality of the blended amine solvent in a CO2 loaded state, correction terms based on the fresh amine and free amine concentrations were added to the CO2 VLE and CO2 absorption rate models, respectively. The developed model was implemented in the commercial software PRO/II® by means of a user-added subroutine. Both the absorber and stripper were represented by rate-based models. The process behavior predictions by the proposed simulation model were compared with the pilot plant operation data. A quite satisfactory agreement between the model and data was obtained, which verifies the effectiveness of the proposed solvent modeling techniques.

中文翻译：

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基于混合胺溶剂的 CO2 捕集过程的新建模方法

摘要 介绍了使用混合胺溶剂的基于吸收的碳捕获过程的建模程序。开发了半经验相关方程来模拟本研究中使用的三元水性胺溶剂中的 CO2 气液平衡 (VLE) 和吸收率。为了反映混合胺溶剂在 CO2 负载状态下的非理想性，基于新鲜胺和游离胺浓度的校正项分别添加到 CO2 VLE 和 CO2 吸收率模型中。开发的模型通过用户添加的子程序在商业软件 PRO/II® 中实现。吸收器和汽提塔都由基于速率的模型表示。所提出的模拟模型对过程行为的预测与中试工厂的运行数据进行了比较。