Modeling inconsistencies exhibited in previous work (O'Connell, 2017) associated with post-combustion methanolamine (MEA) and ammonia (NH₃) absorption processes have been revealed. The origin of the problem was that entropies for ionic reactions were not evaluated from input model equilibrium constants regressed from data. Revised calculations have been made using only properties of formation. Positive and consistent entropy generation rates (${\dot{S}}_{gen}$) are now found for all units and sections, and process convergence was achieved for multiple sections rather than for only single sections as before. Only minor changes in material, energy and overall ${\dot{S}}_{gen}$ appeared in the new simulations. Results for ${\dot{S}}_{gen}$ values show that the greatest irreversibilities for the MEA process are in the stripping section, though significant effects appear in the chiller, heat exchanger, and stripper flash. For the NH₃ process, roughly equal and large contributions to ${\dot{S}}_{gen}$ are in the absorption, heat exchange, and stripping sections. Process improvements should focus on these sections. Applying the methodology to proposed changes would quantitatively reveal the amounts of increased efficiency.

已经揭示了与燃烧后甲醇胺（MEA）和氨（NH ₃）吸收过程相关的先前工作（O'Connell，2017）中显示的建模不一致之处。问题的根源在于，离子反应的熵没有从数据回归的输入模型平衡常数中得到评估。仅使用地层性质进行了修正的计算。正和一致的熵产生率（${\dot{\mathrm{小号}}}_{GËñ}$）现在可以在所有单元和部分中找到，并且实现了多个部分的过程收敛，而不是像以前那样仅单个部分。材料，能量和整体上的微小变化${\dot{\mathrm{小号}}}_{GËñ}$出现在新的模拟中。结果${\dot{\mathrm{小号}}}_{GËñ}$值表明，MEA过程的最大不可逆性是在汽提段，尽管在冷却器，热交换器和汽提塔闪蒸中会产生显着影响。对于NH ₃工艺，${\dot{\mathrm{小号}}}_{GËñ}$在吸收，热交换和汽提部分。流程改进应侧重于这些部分。将方法论应用于拟议的变更将定量揭示提高效率的数量。