Membrane gas contactors are a promising alternative to conventional post-combustion carbon capture technologies. However, residuals of the other acid gas compounds can exist in the flue gas streams emitted from industrial facilities, having a notable impact on the absorption performance of the membrane system. Simultaneous removal of CO₂ and NO₂ from a simulated flue gas stream was carried out in a polytetrafluoroethylene (PTFE) hollow fiber gas-liquid membrane contacting (GLMC) system using different scrubbing solutions. A series of experiments were conducted to study the effects of operating conditions such as gas and liquid cross flow velocities, concentration of feed gas, absorbent nature and concentration, and long-term performance of the GLMC system on the removal efficiencies as well as mass transfer rates of CO₂ and NO₂. Experimental results indicated that simultaneous absorption of CO₂ and NO₂ were enhanced with increasing the liquid-phase cross flow velocity, decreasing gas-phase cross flow velocity, and using chemical stripping absorbents. Moreover, it was shown the sodium hydroxide to be a superior absorbent as compared to alkanolamine solutions for the co-capture of CO₂ and NO₂ species. It was observed that low concentrations of NO₂ in the feed gas had a minimal impact on the decarbonization of GLMC system. The durability of the membrane system was also evaluated by running the simultaneous gas removal experiments over a 24-h period. The consistency of the absorption efficiency results confirmed the potential of using PTFE membrane system for the simultaneous absorption of CO₂ and NO₂ gases.

膜式气体接触器是常规燃烧后碳捕集技术的有希望的替代品。但是，其他酸性气体化合物的残留物可能存在于从工业设施排放的烟气流中，这对膜系统的吸收性能有显着影响。同时去除CO ₂和NO ₂使用不同的洗涤溶液，在模拟的烟气流中，从聚四氟乙烯（PTFE）中空纤维气液膜接触（GLMC）系统中进行萃取。进行了一系列实验来研究诸如气体和液体的横流速度，进料气体的浓度，吸收剂的性质和浓度以及GLMC系统的长期性能等操作条件对去除效率和传质的影响。 CO ₂和NO _2的比率。实验结果表明，CO ₂和NO ₂同时吸收通过增加液相错流速度，降低气相错流速度和使用化学汽提吸收剂，可以提高碳氢化合物的吸收率。而且，显示出与烷醇胺溶液相比，氢氧化钠是用于CO ₂和NO ₂物种的共同捕获的优良吸收剂。观察到进料气体中低浓度的NO ₂对GLMC系统的脱碳影响最小。膜系统的耐用性还通过在24小时内进行同时的除气实验来评估。吸收效率结果的一致性证实了使用PTFE膜系统同时吸收CO ₂和NO ₂气体的潜力。