烟气
渗透
膜
气体分离
二氧化碳
温室气体
工艺工程
空气分离
氮气
体积流量
吸收(声学)
选择性
化学工程
中空纤维膜
膜技术
材料科学
化学
分析化学(期刊)
色谱法
氧气
工程类
有机化学
生态学
生物化学
物理
量子力学
复合材料
生物
催化作用
作者
Palash Panja,Chamila Manankandayalage,Maksudul M. Alam,Milind Deo
摘要
Abstract Direct air capture (DAC) of CO 2 is becoming increasingly important for reducing greenhouse gas concentrations in the atmosphere. However, the cost and energy requirements associated with DAC make it less economically feasible than carbon capture from flue gases. While various methods like solid sorbents and gas–liquid absorption have been explored for DAC, membrane processes have only recently been investigated. The objective of this study is to examine the separation performance of a membrane unit for capturing CO 2 from ambient air. The performance of a membrane depends on several factors, including the composition of the feed gas, pressure ratio, material selectivity, and membrane area. The single‐stage separation process with the co‐current flow and constant permeability flux model is evaluated using a commercial module integrated with a process simulator to separate a binary mixture of carbon dioxide and nitrogen to assess the sensitivity of selectivity on purity and recovery of CO 2 in permeate, and power requirement. Additionally, three levels of CO 2 reduction from the feed stream to the retentate stream (25%, 50%, and 75%) are studied. A trade‐off between purity and recovery factor is observed, and achieving high purity in permeate requires high concentration in the retentate.
科研通智能强力驱动
Strongly Powered by AbleSci AI