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Techno-economic evaluation of membrane and enzymatic-absorption processes for CO2 capture from flue-gas

机译：烟气 - 气体捕获二氧化碳捕获的技术经济评价

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摘要

A large part of the global energy is supplied through fossil-fuel power plants which release a high amount of CO2 into the atmosphere. As long as this energy pattern prevails in the world, concerns about climate change due to sudden rise in the content of green-house gasses (GHGs) might be alleviated only through retrofitting the power plants to CO2 capture units. Gas separation methods such as amine-based absorption could be suggested to hit this target but they could result in a costly and highly intensive process. This study analyzes the integration of a 600 MWe power plant with two promising methods, including membrane technology and enzymatic-absorption process. A techno-economic analysis is then carried out to demonstrate the technical viability and economic efficiency of these two methods compared to traditional separation processes. It is found that the electricity losses are estimated at 95 and 89 MW respectively, to capture 90% of the CO2 which is as low as 15% of the output power. This study also presents cost optimization results including capital and operation expenditures for each method. In comparison, enzyme-based absorption is more economically attractive and results in a lower CO2 capture cost. Overall, this study allows to recognize bottlenecks in each process and then proposes initiatives to improve the capture efficiency.
机译：全球能量的大部分通过化石燃料发电厂供应，该燃料发电厂将大量二氧化碳释放到大气中。只要世界上的这种能量模式普遍存在，才能仅通过将电厂改装到CO2捕获单元来缓解由于绿色房屋气体（GHG）含量突然上升导致的气候变化引起的担忧。可以提出胺基吸收等气体分离方法来击中该目标，但它们可能导致昂贵和高度密集的过程。本研究分析了600 MWE发电厂的整合，具有两个有前途的方法，包括膜技术和酶吸收过程。随后进行了技术经济分析，以展示与传统分离过程相比这两种方法的技术活力和经济效率。发现电力损耗分别估计为95和89兆瓦，捕获90％的CO2，其低至输出功率的15％。本研究还提出了成本优化结果，包括每种方法的资本和运营支出。相比之下，基于酶的吸收更具经济吸引力，并导致较低的CO 2捕获成本。总体而言，这项研究允许识别每个过程中的瓶颈，然后提出提高捕获效率的举措。

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