In this study, diethylene glycol (DEG) as an absorbent was used for gas dehydration. For this purpose, hollow fiber membrane contactor was fabricated from polyvinyl chloride. The effect of surface modification with polydimethylsiloxane in the presence of calcium carbonate nanoparticles, relative humidity percentage of inlet air, variation in the gas and liquid flow rates in a dehydration process were investigated. The surface modification of the membranes increased the contact angle from 64° to 101° and a liquid entry pressure of as high as 7 bar was achieved. Moreover, increasing the gas flow rate led to a significant enhancement in absorption performance. Conversely, it was observed that the liquid flow rate had marginal effect on the mass transfer efficiency and flux i.e. R_M+L/R_M+G = 0.001–0.01. This revealed that the mass transfer resistance was not controlled by the liquid phase. Although higher fluxes were observed for the unmodified membrane contactor, the membrane modified with polydimethylsiloxane and calcium carbonate nanoparticles (i.e. M0.5-1) was more effective compared to the neat membrane (M0) in a 35-day long-term performance test i.e. η_M0.5-1 ≈ 0.12 versus η_M0 = 1.0. The results show that the applied technique for fabricating the hollow fiber membrane contactor can be a promising technique in gas conditioning.

在这项研究中，使用二甘醇（DEG）作为吸收剂进行气体脱水。为此，中空纤维膜接触器由聚氯乙烯制成。研究了在碳酸钙纳米颗粒存在下，用聚二甲基硅氧烷进行表面改性的效果，进气的相对湿度百分比，脱水过程中气体和液体流速的变化。膜的表面改性将接触角从64°增加到101°，并且获得了高达7 bar的液体进入压力。此外，增加气体流速导致吸收性能的显着提高。相反，观察到液体流速对传质效率和通量具有边际影响，即R _{M + L} / R _{M + G} = 0.001-0.01。这表明传质阻力不受液相控制。尽管在未改性的膜接触器中观察到更高的通量，但在35天的长期性能测试中，与纯膜（M0）相比，用聚二甲基硅氧烷和碳酸钙纳米颗粒（即M0.5-1）改性的膜更有效。η _M0.5-1  ≈0.12相对于η _M0  = 1.0。结果表明，所应用的中空纤维膜接触器制造技术在气体调节中可能是有前途的技术。