2023年8月15日 · Hence, the TVSA process is a practical option to achieve high productivity and efficiency on the scale-up application in DAC. Due to the ultra-diluted CO 2 concentration, DAC also requires a higher energy penalty than that captures CO 2 through flue gases ( …

2024年4月1日 · The process performance of three amine-functionalized chemisorbents (TRI-PE-MCM-41, SI-AEATPMS, APDES-NFC-FD-S) and two physisorbents (SIFSIX-18-Ni-β and NbOFFIVE-1-Ni) was evaluated for direct air capture (DAC) of CO 2 in temperature-vacuum swing adsorption (TVSA) and steam-assisted temperature-vacuum swing adsorption (s-TVSA) cycles.Rigorous process optimizations were performed to evaluate ...

2024年11月11日 · This vapor promoted DAC process achieves much higher CO 2 working capacities in comparison with prevalent TVSA techniques, reducing energy consumption and realizing a low total cost of $111–$313 ...

2021年1月15日 · Comparison of different regeneration options for direct air capture (DAC) has usually been limited to only consider pure CO 2 production, limiting the process options to e.g. temperature-vacuum swing adsorption (TVSA) or steam-stripping. In this work, detailed experimental comparison is conducted of temperature swing adsorption (TSA/TCSA) and TVSA for …

2023年7月8日 · 图8 固态胺吸附剂dac流程示意图. 除上述四步tvsa循环之外，研究人员还对三步与五步tvsa循环进行了研究。zhu等提出了一种蒸汽辅助的三步tvsa循环，即在减压条件下将吹扫与再生步骤合并，这是因为蒸汽吹扫时吸附h 2 o所释放出的热量可同时维持co 2 ...

This study presents a comprehensive comparison between the packed bed and monolith contactor configurations for direct air capture (DAC) via process modeling of a temperature-vacuum swing adsorption (TVSA) process. We investigate various design parameters to optimize performance across different contactor geometries, including pellet size, monolith wall thickness, active sorbent content in ...

通过详细的过程建模，评估了五种固体吸附剂在变温真空变压吸附 (tvsa) 和蒸汽辅助变温真空变压吸附 (s-tvsa) 循环中直接空气捕获 co2 的工艺性能。一元 co2、h2o 和二元 co2-h2o 等温线数据（只要有）都适合合适的等温线模型，然后与详细的过程模型集成。通过严格的工艺优化研究了比能量和二氧化碳 ...

2025年1月6日 · A specific focus is given to the TVSA-DAC process considering the uncertainty of the available adsorption mass transfer kinetics. It is found that the CO 2 -productivity ranges from 0.23–13.35 kg CO 2 m −3 h −1 given an interval for the CO 2 mass transfer coefficient of 0.0001–0.1 s −1 in which the highest productivity is obtained ...

评价了三种胺功能化学溶剂 （tri-pe-mcm-41、si-aeatpms、apdes-nfc-fd-s） 和两种物理吸附剂 （sifsix-18-ni-β 和 nboffive-1-ni） 在温度-真空摆动吸附 （tvsa） 和蒸汽辅助温度-真空摆动吸附 （s-tvsa） 循环中对 co2 的直接空气捕获 （dac） 的工艺性能。执行了严格的流程优化，以评估能耗和生产率之间的权衡。

2024年8月14日 · Direct capture of CO \(_2\) from ambient air is technically feasible today, with commercial units already in operation. A demonstrated technology for achieving direct air capture (DAC) is chemical separation of CO \(_2\) in a steam-assisted temperature-vacuum swing adsorption (S-TVSA) process. However, the potential to develop scalable solutions remains high, requiring a detailed understanding ...