Fossil-fuel power plants supply a large part of global energy for domestic and industrial applications at the expense of releasing a high volume of carbon dioxide (CO₂) in the atmosphere. The gas separation market is currently dominated by amine-based absorption technology, which is costly, energy-intensive, and less eco-friendly. Herein, a hybrid system including membrane and enzymatic-absorption processes is proposed to remove CO₂ in flue-gas emitted from a 600 MW_e power plant. As the above-mentioned standalone processes suffer from high investment cost and energy consumption, the hybrid process would exhibit better performance through sharing partial CO₂ capture between two separation units. The optimization results reveal that the membrane process becomes economically more efficient through removing CO₂ in bulk by 75% from the flue-gas. The complete CO₂ capture through the enzymatic-absorption unit then allows to remarkably reduce solvent circulation rate between absorption and desorption units, as well as the energy of CO₂ regeneration. Overall, the hybrid process contributes to decrease the total electricity loss by 124 MW and the total annual cost by 139 M$, which are 10 and 37% lower than those in the standalone membrane process, respectively.

化石燃料发电厂为家用和工业应用提供了全球能源的很大一部分，但其代价是在大气中释放了大量的二氧化碳（CO ₂）。气体分离市场目前主要是基于胺的吸收技术，该技术成本高，能源消耗大，对环境的友好程度较低。在本文中，提出了一种包括膜和酶吸收过程的混合系统，以去除从600 MW _e电厂排放的烟道气中的CO ₂。由于上述独立过程的投资成本和能耗较高，因此混合过程将通过共享部分CO ₂表现出更好的性能。在两个分离单元之间捕获。优化结果表明，通过从烟道气中去除75％的大量CO ₂，膜工艺在经济上变得更加有效。然后，通过酶吸收单元捕获的完整CO ₂可以显着降低吸收单元和解吸单元之间的溶剂循环速率，以及CO ₂再生的能量。总体而言，混合工艺可将总电力损耗降低124 MW，年度总成本降低139 M $，分别比独立膜工艺降低10％和37％。