High-purity CO2 recovery following two-stage temperature swing adsorption using an internally heated and cooled adsorber
High-purity CO2 recovery following two-stage temperature swing adsorption using an internally heated and cooled adsorber
复制标题
DOI：
10.1016/j.seppur.2022.123062
复制
发表时间：
2022-12
影响因子：
8.6
通讯作者：
S. Masuda;Y. Osaka;T. Tsujiguchi;A. Kodama
中科院分区：
文献类型：
--
作者：
S. Masuda;Y. Osaka;T. Tsujiguchi;A. Kodama
获取、储存和使用二氧化碳(CO2)的相关有效技术对于降低大气中的二氧化碳浓度和实现二氧化碳净零排放至关重要。在本研究中，我们通过将吸附填充式换热器与变温吸附的内部加热和冷却过程相结合来捕获二氧化碳。由于单级工艺只能将CO2浓缩到∼的50%以上，因此采用两段工艺可以在模拟烟气中获得大于90%的CO2纯度。结果表明，第二级吸附换热器的体积约为第一级吸附器的三分之一，这是因为第二级原料气中的CO2浓度在第一级增加，从而导致第二级的吸附能力增加。以第二段再生过程的吹风量和再生时间为操作参数，CO2纯度最高可达95%。整体二氧化碳回收率为∼的60%-60%。研究结果表明，需要提高采收率以改善性能。
The availability of relevant and efficient technologies to capture, store, and use carbon dioxide (CO2) is critical to reduce CO2concentrations in the atmosphere and reach net-zero CO2emissions. In this study, we captured CO2by combining an adsorbent-packed heat exchanger with an internal heating and cooling process of thermal swing adsorption. A two-stage process was used to achieve CO2purity greater than 90 % in the simulated flue gas because the single-stage process could only concentrate CO2to ∼ 50 % purity. The results revealed that the volume of the second-stage adsorption heat exchanger is approximately-one-third of the first-stage adsorber because the CO2concentration of the second-stage feed gas increases in the first stage, thereby leading to an increase in the adsorption capacity of the second stage. Maximum CO2purity of 95 % was achieved using the rate of purge air flow and regeneration time in the second-stage regeneration process as operating parameters. The overall CO2recovery ratio was ∼ 60 %. The results of the study indicate the need to enhance the recovery ratio for improved performance.